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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2017	Apr. 30, 2017
Entity Information [Line Items]
Entity Registrant Name	NU SKIN ENTERPRISES INC
Entity Central Index Key	0001021561
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Common Class A [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		52,840,388

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 335,578	$ 357,246
Current investments	11,759	10,880
Accounts receivable	28,838	31,199
Inventories, net	251,947	249,936
Prepaid expenses and other	77,717	65,076
Total current assets	705,839	714,337
Property and equipment, net	450,607	444,732
Goodwill	114,954	114,954
Other intangible assets, net	61,678	63,553
Other assets	161,338	136,469
Total assets	1,494,416	1,474,045
Current liabilities:
Accounts payable	42,076	41,261
Accrued expenses	253,359	275,023
Current portion of long-term debt	99,482	82,727
Total current liabilities	394,917	399,011
Long-term debt	329,001	334,165
Other liabilities	82,913	76,799
Total liabilities	806,831	809,975
Commitments and contingencies (Note 11)
Stockholders' equity:
Class A common stock - 500 million shares authorized, $.001 par value, 90.6 million shares issued	91	91
Additional paid-in capital	449,762	439,635
Treasury stock, at cost - 37.7 million and 38.0 million shares	(1,251,788)	(1,250,123)
Accumulated other comprehensive loss	(74,771)	(84,122)
Retained earnings	1,564,291	1,558,589
Total stockholders' equity	687,585	664,070
Total liabilities and stockholders' equity	$ 1,494,416	$ 1,474,045

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares shares in Millions	Mar. 31, 2017	Dec. 31, 2016
Stockholders' equity:
Common stock, shares authorized (in shares)	500.0	500.0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (in shares)	90.6	90.6
Treasury stock (in shares)	37.7	38.0

Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements of Income (Unaudited) [Abstract]
Revenue	$ 499,099	$ 471,831
Cost of sales	111,266	137,869
Gross profit	387,833	333,962
Operating expenses:
Selling expenses	209,008	195,559
General and administrative expenses	132,563	130,254
Total operating expenses	341,571	325,813
Operating income	46,262	8,149
Other income (expense), net	(4,567)	(2,863)
Income before provision for income taxes	41,695	5,286
Provision for income taxes	14,206	1,970
Net income	$ 27,489	$ 3,316
Net income per share:
Basic (in dollars per share)	$ 0.52	$ 0.06
Diluted (in dollars per share)	$ 0.51	$ 0.06
Weighted-average common shares outstanding:
Basic (in shares)	52,678	55,955
Diluted (in shares)	54,057	56,411

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net income	$ 27,489	$ 3,316
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of taxes of $(222) and $(2,451), respectively	9,695	5,589
Net unrealized gains (losses) on foreign currency cash flow hedges, net of taxes of $213 and $931, respectively	(387)	(1,690)
Reclassification adjustment for realized losses (gains) in current earnings, net of taxes of $(24) and $(66), respectively	43	120
Total other comprehensive income	9,351	4,019
Comprehensive Income	$ 36,840	$ 7,335

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other comprehensive income, net of tax:
Foreign currency translation adjustment, tax	$ (222)	$ (2,451)
Net unrealized gains/(losses) on foreign currency cash flow hedges, tax	213	931
Reclassification adjustment for realized losses/(gains) in current earnings, tax	$ (24)	$ (66)

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 27,489	$ 3,316
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,625	16,945
Equity method earnings	(104)	0
Japan customs expense	0	31,355
Foreign currency (gains)/losses	791	2,411
Stock-based compensation	3,929	2,447
Deferred taxes	4,522	3,668
Changes in operating assets and liabilities:
Accounts receivable	3,269	4,254
Inventories, net	2,340	(6,906)
Prepaid expenses and other	(12,088)	(68,479)
Other assets	(2,023)	2,361
Accounts payable	(125)	4,607
Accrued expenses	(26,282)	5,128
Other liabilities	1,984	(3,823)
Net cash provided by (used in) operating activities	21,327	(2,716)
Cash flows from investing activities:
Purchases of property and equipment	(15,928)	(10,942)
Proceeds on investment sales	4,188	3,902
Purchases of investments	(4,716)	(4,538)
Acquisitions	0	(3,300)
Investment in equity investee	(12,600)	0
Net cash used in investing activities	(29,056)	(14,878)
Cash flows from financing activities:
Exercise of employee stock options and taxes paid related to the net shares settlement of stock awards	164	2,271
Payments on long-term debt	(17,830)	(15,308)
Payment of cash dividends	(18,987)	(19,840)
Income tax benefit of equity awards	0	3,402
Proceeds from long-term debt	25,000	23,721
Repurchases of shares of common stock	(6,816)	(20,006)
Net cash used in financing activities	(18,469)	(25,760)
Effect of exchange rate changes on cash	4,530	4,087
Net decrease in cash and cash equivalents	(21,668)	(39,267)
Cash and cash equivalents, beginning of period	357,246	289,354
Cash and cash equivalents, end of period	$ 335,578	$ 250,087

THE COMPANY	3 Months Ended
THE COMPANY	Mar. 31, 2017
THE COMPANY [Abstract]
THE COMPANY	1. THE COMPANY Nu Skin Enterprises, Inc. (the "Company") is a leading, global direct selling company that develops and distributes premium-quality, innovative personal care products and nutritional supplements that are sold worldwide under the Nu Skin and Pharmanex brands and a small number of other products and services. Over the last several years, the Company has introduced new Pharmanex nutritional supplements and Nu Skin personal care products under its ageLOC anti-aging brand. The Company reports revenue from seven segments: Mainland China; South Korea; South Asia/Pacific, which consists of Australia, Brunei, French Polynesia, Indonesia, Malaysia, New Caledonia, New Zealand, the Philippines, Singapore, Thailand and Vietnam; Americas, which consists of the United States, Canada and Latin America; Japan; Hong Kong/Taiwan; and Europe, Middle East and Africa ("EMEA"), which consists of several markets in Europe as well as Israel, Russia, Ukraine and South Africa (the Company's subsidiaries operating in these countries in each segment are collectively referred to as the "Subsidiaries"). The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. The unaudited consolidated financial statements include the accounts of the Company and its Subsidiaries. All significant intercompany accounts and transactions are eliminated in consolidation. In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of the Company's financial information as of March 31, 2017, and for the three-month periods ended March 31, 2017 and 2016. The results of operations of any interim period are not necessarily indicative of the results of operations to be expected for the fiscal year. The consolidated balance sheet as of December 31, 2016 has been prepared using information from the audited financial statements at that date. For further information, refer to the consolidated financial statements and accompanying footnotes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2016.

NET INCOME PER SHARE	3 Months Ended
NET INCOME PER SHARE	Mar. 31, 2017
NET INCOME PER SHARE [Abstract]
NET INCOME PER SHARE	2. NET INCOME PER SHARE Net income per share is computed based on the weighted-average number of common shares outstanding during the periods presented. Additionally, diluted earnings per share data gives effect to all potentially dilutive common shares that were outstanding during the periods presented. For the three-month periods ended March 31, 2017 and 2016, stock options of 0.8 million and 2.6 million, respectively, were excluded from the calculation of diluted earnings per share because they were anti-dilutive.

DIVIDENDS PER SHARE	3 Months Ended
DIVIDENDS PER SHARE	Mar. 31, 2017
DIVIDENDS PER SHARE [Abstract]
DIVIDENDS PER SHARE	3. DIVIDENDS PER SHARE In February 2017, the Company's board of directors declared a quarterly cash dividend of $0.36 per share. This quarterly cash dividend of $19.0 million was paid on March 15, 2017 to stockholders of record on February 27, 2017. In May 2017, the Company's board of directors declared a quarterly cash dividend of $0.36 per share to be paid on June 14, 2017 to stockholders of record on May 26, 2017.

DERIVATIVE FINANCIAL INSTRUMENTS

3 Months Ended

Mar. 31, 2017

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

4. DERIVATIVE FINANCIAL INSTRUMENTS

The Company enters into non-designated foreign currency derivatives, primarily comprised of foreign currency forward contracts, for which hedge accounting does not apply. The changes in the fair market value of these non-designated derivatives are included in other income/expense in the Company's consolidated statements of income. The Company uses non-designated foreign currency derivatives to hedge foreign-currency-denominated intercompany transactions and to partially mitigate the impact of foreign-currency fluctuations. The fair value of the non-designated foreign currency derivatives is based on third-party quotes.

As of March 31, 2017, the Company did not hold any non-designated derivative contracts. As of March 31, 2016, the Company held non-designated derivative contracts with notional amounts of 500 million Japanese yen ($4.4 million) and 5.8 billion Korean won ($5.0 million). Gains and losses related to non-designated derivative contracts are recorded as part of Other Income (Expense).

The following table summarizes gains (losses) related to derivative instruments not designated as hedging instruments during the three-month periods ended March 31, 2017 and 2016 (U.S. dollars in thousands):

Derivatives not designated as hedging instruments:	Location of Gain (Loss) Recognized in Income	Amount of Gain (Loss) Recognized in Income
		Three Months Ended
		March 31,
		2017	2016

Foreign currency contracts	Other income (expense)	$ (485)	$ (4)

The Company designates as cash-flow hedges those foreign currency forward contracts it enters to hedge forecasted intercompany transactions that are subject to foreign currency exposures. Changes in the fair value of these forward contracts designated as cash-flow hedges are recorded as a component of accumulated other comprehensive income (loss) within shareholders' equity (deficit), and are recognized in the consolidated statement of income during the period which approximates the time the hedged transaction is settled.

As of March 31, 2017, the Company held forward contracts designated as foreign currency cash flow hedges with notional amounts totaling 2.3 billion Japanese yen ($20.6 million), compared to 3.9 billion Japanese yen and 12.0 million euros ($34.6 million and $13.7 million, respectively) as of March 31, 2016, to hedge forecasted foreign-currency-denominated intercompany transactions. The fair value of these hedges were $0.3 million and $2.0 million as of March 31, 2017 and 2016, respectively. The contracts held at March 31, 2017 have maturities through April 2018, and accordingly, all unrealized gains and losses on foreign currency cash flow hedges included in accumulated other comprehensive loss will be recognized in current earnings over the next 13 months.

The following table summarizes gains (losses) related to derivative instruments recorded in other comprehensive income (loss) during the three-month periods ended March 31, 2017 and 2016 (U.S. dollars in thousands):

	Amount of Gain (Loss) Recognized in Other Comprehensive Loss
	Three Months Ended
	March 31,
Derivatives designated as hedging instruments:	2017	2016

Foreign currency forward contracts related to intercompany license fee, product sales, and selling expense hedges	$ (387)	$ (1,690)

The following table summarizes gains (losses) relating to derivative instruments reclassified from accumulated other comprehensive loss into income during the three-month periods ended March 31, 2017 and 2016 (U.S. dollars in thousands):

Derivatives designated as hedging instruments:	Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income
		Three Months Ended
		March 31,
		2017	2016

Foreign currency forward contracts related to intercompany license fees and product sales hedges	Revenue	$ (25)	$ (78)
Foreign currency forward contracts related to intercompany selling expense hedges	Selling expenses	$ (41)	$ (107)

As of March 31, 2017 and December 31, 2016, there were $0.2 million and $0.6 million, respectively, of unrealized gains/(losses) included in accumulated other comprehensive loss related to foreign currency cash flow hedges. The remaining $75.0 million and $84.7 million as of March 31, 2017 and December 31, 2016, respectively, in accumulated other comprehensive loss are related to cumulative translation adjustments. The Company assesses hedge effectiveness at least quarterly. During the three months ended March 31, 2017 and 2016, all hedges were determined to be effective.

The Company reports its derivatives at fair value as either other current assets or accrued expenses within its consolidated balance sheet. See Note 13 Fair Value.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

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+ Details

REPURCHASES OF COMMON STOCK	3 Months Ended
REPURCHASES OF COMMON STOCK	Mar. 31, 2017
REPURCHASES OF COMMON STOCK [Abstract]
REPURCHASES OF COMMON STOCK	5. REPURCHASES OF COMMON STOCK During the three-month periods ended March 31, 2017 and 2016, the Company repurchased 0.1 million and 0.6 million shares of its Class A common stock under its open market stock repurchase plan for $6.8 million and $20.0 million, respectively. As of March 31, 2017, $192.9 million was available for repurchases under the Company's open market stock repurchase plan.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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+ Details

SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2017

SEGMENT INFORMATION [Abstract]

SEGMENT INFORMATION

6. SEGMENT INFORMATION

As a result of the Company's management changes in the first quarter of 2017, the Company concluded that the Chief Operating Decision Maker, as defined in ASC 280 is now comprised of the CEO, President and CFO. This change required the Company to reevaluate its determination of operating segments. The Company's operating segments are based on geographic regions that generate revenue and hold its long-lived assets. The Company sells and distributes its products through a global network of customers and sales leaders in approximately 50 markets. The Company has divided these markets into seven operating segments, which are the Company's reportable segments: Mainland China, Hong Kong/Taiwan, South Korea, Japan, South Asia/Pacific, Americas and EMEA. The seven reportable segments generate revenue from the sale of personal care products and nutritional supplements under the Nu Skin and Pharmanex brands, have similar business characteristics and align with how the CODM function began assessing performance and allocating resources in the first quarter of 2017.

Profitability by segment as reported under US GAAP is driven primarily by the Company's international taxation policies. Segment contribution, which is the Company's segment profitability metric presented in the table below, excludes certain intercompany charges, specifically royalties, license fees, transfer pricing, discrete charges and other miscellaneous items. These charges have been included in Corporate and other expenses. Corporate and other expenses also include costs related to the Company's executive and administrative offices, information technology, research and development, marketing and supply chain functions not recorded at the segment level.

The accounting policies of the segments are the same as those described in Note 1 – The Company. The Company evaluates the performance of its segments based on revenue and segment contribution. Each segment records direct expenses related to its employees and its operations.

Summarized financial information for the Company's reportable segments is shown in the following tables. Asset information is not reviewed or included with the Company's internal management reporting. Therefore, the Company has not disclosed asset information for each reportable segment.

Revenue by Segment

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Mainland China	$	150,004	$	118,655
South Korea		82,471		86,118
South Asia/Pacific		69,798		63,578
Americas		65,658		65,748
Japan		61,156		65,091
Hong Kong/Taiwan		35,948		40,056
EMEA		34,064		32,585
Total	$	499,099	$	471,831

Segment Contribution

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017			2016

Mainland China	$	35,427		$	18,301
South Korea		24,512			24,057
South Asia/Pacific		13,980			12,453
Americas		10,096			10,472
Japan		12,426			12,047
Hong Kong/Taiwan		5,083			8,358
EMEA		1,791			347
Total segment contribution		103,315			86,035
Corporate and other		(57,053	)		(77,886	)
Operating income		46,262			8,149
Other income (expense)		(4,567	)		(2,863	)
Income before provision for income taxes	$	41,695		$	5,286

Depreciation and Amortization

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Mainland China	$	3,971	$	4,027
South Korea		1,632		1,641
South Asia/Pacific		563		563
Americas		530		659
Japan		880		893
Hong Kong/Taiwan		302		564
EMEA		272		304
Corporate and other		9,475		8,294
Total	$	17,625	$	16,945

Capital Expenditures

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Mainland China	$	903	$	4,900
South Korea		448		270
South Asia/Pacific		183		277
Americas		251		278
Japan		76		739
Hong Kong/Taiwan		606		228
EMEA		193		465
Corporate and other		13,268		3,785
Total	$	15,928	$	10,942

Revenue by Major Market

A major market is defined as one with total revenue greater than 10% of consolidated total revenue. As shown in the revenue by segment table above, the Company identified three major markets: Mainland China, South Korea and Japan. There are approximately 50 other markets, each of which individually is less than 10%. No single customer accounted for 10% or more of net sales for the periods presented. Sales are recorded in the jurisdiction in which the transactions occurred.

Revenue by Product Line

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Nu Skin	$	301,873	$	289,989
Pharmanex		196,103		180,714
Other		1,123		1,128
Total	$	499,099	$	471,831

Long-Lived Assets by Major Market

A major market is defined as a market with long-lived assets greater than 10% of consolidated long-lived assets and also includes the Company's country of domicile (the U.S.). Long-lived assets in Mainland China consist primarily of property, plant and equipment related to manufacturing, distribution facilities and the Mainland China headquarters. Long-lived assets in the U.S. consist primarily of property, plant and equipment, including the Company's corporate offices and distribution facilities. Long-lived assets by major markets are set forth below:

(U.S. dollars in thousands)	March 31, 2017		December 31, 2016

United States	$	289,228	$	283,868
Mainland China		95,458		97,867
South Korea		44,280		41,545
Japan		11,250		11,517
All others		10,391		9,935
Total	$	450,607	$	444,732

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599

+ Details

GOODWILL

3 Months Ended

Mar. 31, 2017

GOODWILL [Abstract]

GOODWILL

7. GOODWILL

During the first quarter of 2017, the Company realigned its operational segments and reporting structure to reflect how the business will be managed going forward. As part of this realignment, the Company divided its single operating segment into seven geographical reporting segments. The Company's reporting units for goodwill are its operating segments, which are also its reportable segments. As a result of the segment changes, the historical goodwill of $115.0 million was allocated to the seven reportable segments.

The following table presents goodwill allocated to the Company's reportable segments for the periods ended March 31, 2017 and December 31, 2016 (U.S. dollars in thousands):

	March 31, 2017		December 31, 2016⁽¹⁾

Mainland China	$	32,179	$	32,179
South Korea		29,261		29,261
South Asia/Pacific		18,537		18,537
Americas		9,449		9,449
Japan		16,019		16,019
Hong Kong/Taiwan		6,634		6,634
EMEA		2,875		2,875
Total	$	114,954	$	114,954

(1)

Goodwill was recast to reflect current period presentation by geographic region at December 31, 2016.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

INVENTORY

3 Months Ended

Mar. 31, 2017

INVENTORY [Abstract]

INVENTORY

8. INVENTORY

Inventories consist of the following (U.S. dollars in thousands):

	March 31, 2017		December 31, 2016

Raw materials	$	104,177	$	108,276
Finished goods		147,770		141,660
	$	251,947	$	249,936

DEFERRED TAX ASSETS AND LIABILITIES	3 Months Ended
DEFERRED TAX ASSETS AND LIABILITIES	Mar. 31, 2017
DEFERRED TAX ASSETS AND LIABILITIES [Abstract]
DEFERRED TAX ASSETS AND LIABILITIES	9. DEFERRED TAX ASSETS AND LIABILITIES The Company accounts for income taxes in accordance with the Income Taxes Topic of the Financial Accounting Standards Codification. These standards establish financial accounting and reporting standards for the effects of income taxes that result from an enterprise's activities during the current and preceding years. The Company takes an asset and liability approach for financial accounting and reporting of income taxes. The Company pays income taxes in many foreign jurisdictions based on the profits realized in those jurisdictions, which can be significantly impacted by terms of intercompany transactions between the Company and its foreign affiliates. Deferred tax assets and liabilities are created in this process. The Company has netted these deferred tax assets and deferred tax liabilities by jurisdiction. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be ultimately realized. As of March 31, 2017 and December 31, 2016, the Company had net deferred tax assets of $31.7 million and $35.1 million, respectively. The Company evaluates its indefinite reinvestment assertions with respect to foreign earnings for each quarter. Other than earnings the Company intends to reinvest indefinitely, the Company accrues for the U.S. federal and state income taxes applicable to the earnings. For all foreign earnings, the Company accrues the applicable foreign income taxes. The Company intends to utilize the offshore earnings to fund foreign investments, specifically capital expenditures. Undistributed earnings that the Company has indefinitely reinvested, for which no federal or state income taxes in the U.S. have been provided, aggregate to $70.0 million as of December 31, 2016. If the amount designated as indefinitely reinvested as of December 31, 2016 was repatriated to the United States, the amount of incremental taxes would be approximately $7.6 million.

UNCERTAIN TAX POSITIONS	3 Months Ended
UNCERTAIN TAX POSITIONS	Mar. 31, 2017
UNCERTAIN TAX POSITIONS [Abstract]
UNCERTAIN TAX POSITIONS	10. UNCERTAIN TAX POSITIONS The Company files income tax returns in the U.S. federal jurisdiction, and in various state and foreign jurisdictions. The Company is no longer subject to tax examinations from the IRS for all years for which tax returns have been filed before 2011. With a few exceptions, the Company is no longer subject to state and local income tax examination by tax authorities for the years before 2011. In 2009, the Company entered into a voluntary program with the IRS called Compliance Assurance Process ("CAP"). The objective of CAP is to contemporaneously work with the IRS to achieve federal tax compliance and resolve all or most of the issues prior to filing of the tax return. The Company has elected to participate in the CAP program for 2017 and may elect to continue participating in CAP for future tax years; the Company may withdraw from the program at any time. In major foreign jurisdictions, the Company is generally no longer subject to income tax examinations for years before 2010. However, statutes in certain countries may be as long as ten years for transfer pricing related issues. Along with the IRS examination of 2011, the Company is currently under examination in certain foreign jurisdictions; however, the outcomes of those reviews are not yet determinable. The Company's unrecognized tax benefits relate to multiple foreign and domestic jurisdictions. There are potential changes in unrecognized tax benefits from the multiple jurisdictions in which the Company operates, as well as the expiration of various statutes of limitation and possible completion of tax examinations; however, the Company does not anticipate that total unrecognized tax benefits will significantly change over the next 12 months.

COMMITMENTS AND CONTINGENCIES	3 Months Ended
COMMITMENTS AND CONTINGENCIES	Mar. 31, 2017
COMMITMENTS AND CONTINGENCIES [Abstract]
COMMITMENTS AND CONTINGENCIES	11. COMMITMENTS AND CONTINGENCIES The Company is subject to government regulations pertaining to product formulation, labeling and packaging, product claims and advertising, and the Company's direct selling system. The Company is also subject to the jurisdiction of numerous foreign tax and customs authorities. Any assertions or determination that either the Company or the Company's sales force is not in compliance with existing statutes, laws, rules or regulations could have a material adverse effect on the Company's operations. In addition, in any country or jurisdiction, the adoption of new statutes, laws, rules or regulations or changes in the interpretation of existing statutes, laws, rules or regulations could have a material adverse effect on the Company and its operations. Although management believes that the Company is in compliance in all material respects with the statutes, laws, rules and regulations of every jurisdiction in which it operates, no assurance can be given that the Company's compliance with applicable statutes, laws, rules and regulations will not be challenged by foreign authorities or that such challenges will not have a material adverse effect on the Company's financial position, results of operations or cash flows. The Company and its Subsidiaries are defendants in litigation, investigations and other proceedings involving various matters. In the opinion of the Company's management, based upon advice of its counsel handling such litigation, investigations and other proceedings, adverse outcomes, if any, will not likely result in a material effect on the Company's consolidated financial condition, results of operations or cash flows. The Company is subject to regular audits by federal, state and foreign tax authorities. These audits may result in additional tax liabilities. The Company believes it has appropriately provided for income taxes for all years. Several factors drive the calculation of its tax reserves. Some of these factors include: (i) the expiration of various statutes of limitations; (ii) changes in tax law and regulations; (iii) issuance of tax rulings; and (iv) settlements with tax authorities. Changes in any of these factors may result in adjustments to the Company's reserves, which would impact its reported financial results.

DEBT

3 Months Ended

Mar. 31, 2017

DEBT [Abstract]

DEBT

12. DEBT

Credit Agreement

On October 9, 2014, the Company entered into a Credit Agreement (the "Credit Agreement") with various financial institutions, and Bank of America, N.A. as administrative agent. The Credit Agreement provides for a $127.5 million term loan facility, a 6.6 billion Japanese yen term loan facility and a $187.5 million revolving credit facility, each with a term of five years. On October 10, 2014, the Company drew the full amount of the term loan facilities, and as of December 31, 2015 and 2016, the Company had an outstanding balance of $47.5 million on the revolving credit facility. Any additional amounts drawn under the revolving credit facility will bear interest at rates that will be determined in accordance with the Credit Agreement. The Credit Agreement requires that the Company maintains a consolidated leverage ratio not exceeding 2.25 to 1.00 and a consolidated interest coverage ratio of no less than 3.00 to 1.00. The Company believes these covenants provide it with greater flexibility to pay dividends and repurchase stock. The Company is in compliance with its debt covenants.

Convertible Note

On June 16, 2016, the Company issued $210.0 million of convertible senior notes (the "Convertible Notes") in a private offering to a Chinese investor (the "Holder"). The Convertible Notes are senior unsecured obligations which will rank equal in right of payment to all senior unsecured indebtedness of the Company, and will rank senior in right of payment to any indebtedness that is contractually subordinated to the Convertible Notes. Interest on the Convertible Notes is payable semiannually in arrears on June 15 and December 15 of each year at a rate of 4.75% per annum.

The Convertible Notes mature on June 15, 2020, unless repurchased or converted prior to maturity. Prior to the stated maturity date, the Company may, at its option, redeem all or part of the Convertible Notes at a price equal to 100% of the principal amount thereof, plus accrued and unpaid interest, if any, provided that its common stock share price is equal to or exceeds 180% of the applicable conversion price for 20 or more trading days (including the final three trading days) in the 30 consecutive trading days prior to the Company's exercise of such redemption right. The Holder of the Convertible Notes may, at its option, cause the Company to repurchase all of such Holder's Convertible Notes or any portion thereof that is equal to $1,000 in principal amount or multiples of $1,000 upon a change in control or a termination of trading of the Company's common stock, as those terms are defined in the indenture governing the Convertible Notes. In addition, each holder of the Convertible Notes shall have the right, at such holder's option, to convert all or any portion thereof that is equal to $1,000 in principal amount or multiples of $1,000 at any time beginning six calendar months following June 16, 2016, at the then-applicable conversion rate. Upon conversion by the Holder, the Convertible Notes will be settled in cash with respect to principal and any accrued and unpaid interest to such date and in the Company's common shares with respect to any additional amounts, based on the applicable conversion rate at such time. The Convertible Notes had an initial conversion rate of 21.5054 common shares per $1,000 principal amount of the Convertible Notes (which is equal to an initial conversion price of approximately $46.50 per common share). Throughout the term of the Convertible Notes, the conversion rate may be adjusted upon the occurrence of certain specified events.

Of the $210.0 million in proceeds received from the issuance of the Convertible Notes, $199.1 million was allocated to long-term debt (the "Liability Component") and $10.9 million was allocated to additional paid-in capital (the "Equity Component") within the Company's consolidated balance sheet. The Liability Component was calculated by measuring the fair value of a similar debt instrument that does not have an associated conversion feature. The amount allocated to the Equity Component, which represents the conversion option, was calculated by deducting the fair value of the Liability Component from the par value of the Convertible Notes. The Company determined that the conversion option does not require separate accounting treatment as a derivative instrument because it is both indexed to the Company's own stock and would be classified in stockholders' equity if freestanding. The Equity Component will not be remeasured as long as it continues to meet the conditions for equity classification. The excess of the principal amount of the Liability Component over its carrying amount (the "Debt Discount") will be amortized to interest expense over the term of the Convertible Notes. As a result, the Liability Component will be accreted up to the Convertible Notes' $210.0 million face value, resulting in additional non-cash interest expense being recognized within the Company's consolidated statement of income. The effective interest rate on the Convertible Notes is approximately 7.1% per annum.

The net carrying amount of the Liability Component is as follows (U.S. dollars in thousands):

	March 31, 2017

Principal	$	210,000
Unamortized debt discount (conversion option)		(9,003	)
Total long-term debt, net		200,997
Unamortized debt discount (issuance costs)		(5,152	)
Net carrying amount	$	195,845

The net carrying amount of the Liability Component was recorded to long-term debt within the Company's consolidated balance sheet.

The Company incurred approximately $6.6 million of issuance costs related to the issuance of the Convertible Notes. Of the $6.6 million in issuance costs incurred, $6.3 million and $0.3 million were recorded to deferred financing cost and additional paid-in capital, respectively, in proportion to the allocation of the proceeds of the Convertible Notes. The $6.3 million recorded to deferred financing cost on the Company's consolidated balance sheet as a reduction of long-term debt is being amortized over the contractual term of the Convertible Notes using the effective interest method.

During the three months ended March 31, 2017, the Company recognized $3.5 million in interest expense related to the Convertible Notes, which included $2.5 million of contractual interest and $1.0 million in amortization of debt issuance costs and in amortization of the Debt Discount.

The following table summarizes the Company's debt facilities as of March 31, 2017 and December 31, 2016:

Facility or Arrangement	Original Principal Amount	Balance as of March 31, 2017⁽¹⁾⁽²⁾	Balance as of December 31, 2016	Interest Rate	Repayment terms

Credit Agreement term loan facility:

U.S. dollar denominated:	$127.5 million	$105.2 million	$108.4 million	Variable 30 day: 3.73%	One half of the principal amount payable in increasing quarterly installments over a five-year period beginning on December 31, 2014, with the remainder payable at the end of the five-year term.

Japanese yen denominated:	6.6 billion yen	5.4 billion yen ($48.8 million as of March 31, 2017)	5.6 billion yen ($47.9 million as of December 31, 2016)	Variable 30 day: 2.76%	One half of the principal amount payable in increasing quarterly installments over a five-year period beginning on December 31, 2014, with the remainder payable at the end of the five-year term.

Credit Agreement revolving credit facility:

		$72.5 million	$47.5 million	Variable 30 day: 3.73%	Revolving line of credit expires October 2019.

Korea subsidiary loan:	$20.0 million	—	$10.0 million	1.12%	Loan paid in full as of March 2017.

Japan subsidiary loan:	2.0 billion yen	1.0 billion yen ($9.0 million as of March 31, 2017)	1.3 billion yen ($11.4 million as of December 31, 2016)	0.66%	Payable in semi-annual installments over three years that began on January 31, 2016.

Convertible note	$210.0 million	$210.0 million	$210.0 million	4.75%	Principal amount payable on June 15, 2020.

⁽¹⁾

As of March 31, 2017, the current portion of the Company's debt (i.e. becoming due in the next 12 months) included $14.3 million of the balance of its U.S. dollar denominated debt under the Credit Agreement facility, $6.7 million of the balance of its Japanese yen-denominated debt under the Credit Agreement facility and $6.0 million of the Japan subsidiary loan. The Company has classified the $72.5 million borrowed under the revolving line of credit as short term because it is the Company's intention to use the line of credit to borrow and pay back funds over short periods of time.

⁽²⁾

The carrying value of the debt reflects the amounts stated in the above table less a debt discount of $11.9 million and debt issuance costs of $5.2 million (consisting of $14.2 million related to the Convertible Note and $2.9 million related to the credit agreement), which is not reflected in this table.

FAIR VALUE

3 Months Ended

Mar. 31, 2017

FAIR VALUE [Abstract]

FAIR VALUE

13. FAIR VALUE

The carrying value of financial instruments including cash and cash equivalents, accounts receivable and accounts payable approximate fair values due to the short-term nature of these instruments. The Company's current investments as of March 31, 2017 include certificates of deposits and pre-refunded municipal bonds that are classified by management as held-to-maturity as the Company had the positive intent and ability to hold to maturity. The carrying value of these current investments approximate fair values due to the short-term nature of these instruments. The Company has classified these instruments as Level 2 in the fair value hierarchy. Fair value estimates are made at a specific point in time, based on relevant market information.

The FASB Codification defines fair value as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. On a quarterly basis, the Company measures at fair value certain financial assets, including cash equivalents. Accounting standards specify a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect data obtained from independent sources, while unobservable inputs reflect the Company's market assumptions. These two types of inputs have created the following fair-value hierarchy:

▪ Level 1 – quoted prices in active markets for identical assets or liabilities;

▪ Level 2 – inputs, other than the quoted prices in active markets, that are observable either directly or indirectly;

▪ Level 3 – unobservable inputs based on the Company's own assumptions.

Accounting standards permit companies, at their option, to measure many financial instruments and certain other items at fair value. The Company has elected not to apply the fair value option to existing eligible items.

The following tables present the fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis (U.S. dollars in thousands):

	Fair Value at March 31, 2017
	Level 1		Level 2		Level 3		Total

Financial assets (liabilities):
Cash equivalents and current investments	$	37,947	$	—	$	—	$	37,947
Other long-term assets		3,557		—		—		3,557
Forward contracts		—		339		—		339
Life insurance contracts		—		—		34,024		34,024
Total	$	41,504	$	339	$	34,024	$	75,867

	Fair Value at December 31, 2016
	Level 1		Level 2		Level 3		Total

Financial assets (liabilities):
Cash equivalents and current investments	$	50,307	$	—	$	—	$	50,307
Other long-term assets		2,782		—		—		2,782
Forward contracts		—		1,371		—		1,371
Life insurance contracts		—		—		32,286		32,286
Total	$	53,089	$	1,371	$	32,286	$	86,746

The following table provides a summary of changes in fair value of the Company's Level 3 marketable securities (U.S. dollars in thousands):

Life Insurance Contracts

Beginning balance at January 1, 2017	$	32,286
Actual return on plan assets:
Relating to assets still held at the reporting date		1,535
Purchases and issuances		314
Sales and settlements		(111	)
Transfers into Level 3		—
Ending balance at March 31, 2017	$	34,024

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

ACCOUNTING PRONOUNCEMENTS	3 Months Ended
ACCOUNTING PRONOUNCEMENTS	Mar. 31, 2017
ACCOUNTING PRONOUNCEMENTS [Abstract]
ACCOUNTING PRONOUNCEMENTS	14. ACCOUNTING PRONOUNCEMENTS In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). The new revenue recognition standard provides a five-step analysis of transactions to determine when and how revenue is recognized. The core principle is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU is effective for annual periods beginning after December 15, 2017. As the Company evaluates the impact of this ASU, the more significant changes that the Company has identified relate to the current method of accruing its loyalty points program from a cost provision method to a deferred revenue method in accordance with the new guidance. The Company is continuing to evaluate the impact this ASU, and related amendments and interpretive guidance, will have on its consolidated financial statements. The Company plans to adopt this ASU beginning in the first quarter of 2018 with a cumulative adjustment to retained earnings as opposed to retrospectively adjusting prior periods. In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory. This guidance requires an entity to measure inventory at the lower of cost and net realizable value, rather than at the lower of cost or market. This ASU was effective for the Company beginning on January 1, 2017. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Subtopic 842). ASU 2016-02 will require companies to recognize lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. For public companies, this standard is effective for annual reporting periods beginning after December 15, 2018, and early adoption is permitted. The Company is currently evaluating the impact of this standard on its consolidated financial position, results of operations, and cash flows. In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The objective of this update was to simplify several aspects of the accounting for employee share-based payment transactions, including accounting for income taxes related to share-based compensation, the related classification in the statement of cash-flows, and accounting for share award forfeitures. This ASU was effective for the Company beginning on January 1, 2017. As required by the adoption of this new guidance, the Company recognized excess tax benefits of $0.8 million in the provision for income taxes as a discrete item during the quarter ended March 31, 2017. Prior to January 1, 2017, excess tax benefits were recognized in equity. As permitted, the Company elected to classify excess tax benefits as an operating activity in the Statement of Cash Flows instead of as a financing activity on a prospective basis and did not retroactively adjust prior periods. As also permitted by the new guidance, beginning January 1, 2017 the Company has elected to account for share award forfeitures as they occur. Previously, share-based compensation expense was recorded net of estimated forfeitures. A cumulative adjustment of $2.8 million was recorded to retained earnings and additional paid-in capital as of January 1, 2017. Prior periods were not retroactively adjusted. In the second half of 2016, the FASB issued ASU Nos. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, and 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The objective of these updates is to reduce the diversity in practice in the classification of certain cash receipts and cash payments, and the presentation of restricted cash within an entity's statement of cash flows, respectively. These ASUs are effective for interim and annual fiscal periods beginning after December 15, 2017. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. This guidance revises the definition of a business as it relates to acquisitions, disposals, goodwill impairments and consolidations. This ASU is effective for annual periods beginning after December 15, 2017. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This guidance simplifies the required test of goodwill for impairment by eliminating Step 2 from the goodwill impairment test. If a company determines in Step 1 of the goodwill impairment test that the carrying value of goodwill is less than the fair value, an impairment in that amount should be recorded to the income statement, rather than proceeding to Step 2. This ASU is effective for interim and annual impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6507316

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Direct Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=66092750

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Indirect Effects of a Change in Accounting Principle
-URI http://asc.fasb.org/extlink&oid=6515603

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 250
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Topic 250
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Retrospective Application
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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+ Details

COST OF SALES	3 Months Ended
COST OF SALES	Mar. 31, 2017
COST OF SALES [Abstract]
COST OF SALES	15. COST OF SALES In April 2017, the Tokyo High Court issued a ruling on a dispute between the Company and the customs authorities in Japan. The High Court affirmed the Tokyo District Court's February 2016 decision upholding previous customs assessments related to the importation of several of the Company's products into Japan during 2010. The High Court's decision applies only to imports that occurred during 2010; the Company's appeal regarding imports during the other time periods in the dispute is still pending with the High Court. The Company intends to appeal the High Court's decision to the Japan Supreme Court. As previously disclosed, the Company already recorded a charge of $31.4 million to cost of sales in the first quarter of 2016, when the District Court issued its decision. This was a non-cash item because the Company was previously required to pay the assessments. This charge represents the full amount that was disputed, including assessments for the period of October 2006 through September 2009 in connection with post-importation audits, as well as the disputed portion of our import duties from October 2009 to the date of the District Court's decision.

ACQUISITION AND INVESTMENT IN EQUITY INVESTEE	3 Months Ended
ACQUISITION AND INVESTMENT IN EQUITY INVESTEE	Mar. 31, 2017
ACQUISITION AND INVESTMENT IN EQUITY INVESTEE [Abstract]
ACQUISITION AND INVESTMENT IN EQUITY INVESTEE	16. ACQUISITION AND INVESTMENT IN EQUITY INVESTEE Vertical Eden, LLC In the first quarter of 2016, the Company purchased 70% of Vertical Eden, LLC, an early-stage company in the warehouse growing market, based in Alpine, Utah, for $3.3 million in cash and contingent consideration valued at $1.5 million. The purchase of Vertical Eden includes specialized technology in remote programming and management of the entire crop growing cycle. As a result of this acquisition, the Company has recorded approximately $4.4 million of intangible assets which are being amortized over the useful lives of 3 to 7 years. The Company has also recorded $2.5 million of goodwill. Due to the insignificance of the transaction to the Company's consolidated financial statements, the Company has not separately presented the $2.1 million non-controlling interest related to this acquisition, but has included it in other liabilities and has included the net income (loss) attributable to the non-controlling interest in other income (expense). Treviso, LLC On February 28, 2017, the Company purchased a 35% membership interest in Treviso, LLC, which owns a manufacturing company, for a purchase price of $21.0 million and a possible earnout of $1.0 million. The purchase price included $12.6 million in cash and $8.4 million in the Company's stock (169,560 shares based on the closing stock price of $49.54 per share on February 28, 2017).

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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+ Details

ACCOUNTING PRONOUNCEMENTS (Policies)	3 Months Ended
ACCOUNTING PRONOUNCEMENTS (Policies)	Mar. 31, 2017
ACCOUNTING PRONOUNCEMENTS [Abstract]
Share-based Compensation	In March 2016, the FASB issued ASU 2016-09, Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The objective of this update was to simplify several aspects of the accounting for employee share-based payment transactions, including accounting for income taxes related to share-based compensation, the related classification in the statement of cash-flows, and accounting for share award forfeitures. This ASU was effective for the Company beginning on January 1, 2017. As required by the adoption of this new guidance, the Company recognized excess tax benefits of $0.8 million in the provision for income taxes as a discrete item during the quarter ended March 31, 2017. Prior to January 1, 2017, excess tax benefits were recognized in equity. As permitted, the Company elected to classify excess tax benefits as an operating activity in the Statement of Cash Flows instead of as a financing activity on a prospective basis and did not retroactively adjust prior periods. As also permitted by the new guidance, beginning January 1, 2017 the Company has elected to account for share award forfeitures as they occur. Previously, share-based compensation expense was recorded net of estimated forfeitures. A cumulative adjustment of $2.8 million was recorded to retained earnings and additional paid-in capital as of January 1, 2017. Prior periods were not retroactively adjusted.

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2017

DERIVATIVE FINANCIAL INSTRUMENTS [Abstract]

Gains (Losses) Related to Derivative Instruments Not Designated as Hedging Instruments

Derivatives not designated as hedging instruments:	Location of Gain (Loss) Recognized in Income	Amount of Gain (Loss) Recognized in Income
		Three Months Ended
		March 31,
		2017	2016

Foreign currency contracts	Other income (expense)	$ (485)	$ (4)

Gains (Losses) Related to Derivative Instruments Designated as Cash Flow Hedges

	Amount of Gain (Loss) Recognized in Other Comprehensive Loss
	Three Months Ended
	March 31,
Derivatives designated as hedging instruments:	2017	2016

Foreign currency forward contracts related to intercompany license fee, product sales, and selling expense hedges	$ (387)	$ (1,690)

Derivatives designated as hedging instruments:	Location of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income
		Three Months Ended
		March 31,
		2017	2016

Foreign currency forward contracts related to intercompany license fees and product sales hedges	Revenue	$ (25)	$ (78)
Foreign currency forward contracts related to intercompany selling expense hedges	Selling expenses	$ (41)	$ (107)

SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2017

SEGMENT INFORMATION [Abstract]

Revenue by Segment

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Mainland China	$	150,004	$	118,655
South Korea		82,471		86,118
South Asia/Pacific		69,798		63,578
Americas		65,658		65,748
Japan		61,156		65,091
Hong Kong/Taiwan		35,948		40,056
EMEA		34,064		32,585
Total	$	499,099	$	471,831

Segment Contribution

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017			2016

Mainland China	$	35,427		$	18,301
South Korea		24,512			24,057
South Asia/Pacific		13,980			12,453
Americas		10,096			10,472
Japan		12,426			12,047
Hong Kong/Taiwan		5,083			8,358
EMEA		1,791			347
Total segment contribution		103,315			86,035
Corporate and other		(57,053	)		(77,886	)
Operating income		46,262			8,149
Other income (expense)		(4,567	)		(2,863	)
Income before provision for income taxes	$	41,695		$	5,286

Depreciation and Amortization and Capital Expenditures

Depreciation and Amortization

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Mainland China	$	3,971	$	4,027
South Korea		1,632		1,641
South Asia/Pacific		563		563
Americas		530		659
Japan		880		893
Hong Kong/Taiwan		302		564
EMEA		272		304
Corporate and other		9,475		8,294
Total	$	17,625	$	16,945

Capital Expenditures

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Mainland China	$	903	$	4,900
South Korea		448		270
South Asia/Pacific		183		277
Americas		251		278
Japan		76		739
Hong Kong/Taiwan		606		228
EMEA		193		465
Corporate and other		13,268		3,785
Total	$	15,928	$	10,942

Revenue by Product Line

	Three Months Ended March 31,
(U.S. dollars in thousands)	2017		2016

Nu Skin	$	301,873	$	289,989
Pharmanex		196,103		180,714
Other		1,123		1,128
Total	$	499,099	$	471,831

Long-lived Assets by Major Markets

Long-lived assets by major markets are set forth below:

(U.S. dollars in thousands)	March 31, 2017		December 31, 2016

United States	$	289,228	$	283,868
Mainland China		95,458		97,867
South Korea		44,280		41,545
Japan		11,250		11,517
All others		10,391		9,935
Total	$	450,607	$	444,732

GOODWILL (Tables)

3 Months Ended

Mar. 31, 2017

GOODWILL [Abstract]

Goodwill

The following table presents goodwill allocated to the Company's reportable segments for the periods ended March 31, 2017 and December 31, 2016 (U.S. dollars in thousands):

	March 31, 2017		December 31, 2016⁽¹⁾

Mainland China	$	32,179	$	32,179
South Korea		29,261		29,261
South Asia/Pacific		18,537		18,537
Americas		9,449		9,449
Japan		16,019		16,019
Hong Kong/Taiwan		6,634		6,634
EMEA		2,875		2,875
Total	$	114,954	$	114,954

(1)

Goodwill was recast to reflect current period presentation by geographic region at December 31, 2016.

INVENTORY (Tables)

3 Months Ended

Mar. 31, 2017

INVENTORY [Abstract]

Inventories

Inventories consist of the following (U.S. dollars in thousands):

	March 31, 2017		December 31, 2016

Raw materials	$	104,177	$	108,276
Finished goods		147,770		141,660
	$	251,947	$	249,936

DEBT (Tables)

3 Months Ended

Mar. 31, 2017

DEBT [Abstract]

Convertible Note

The net carrying amount of the Liability Component is as follows (U.S. dollars in thousands):

	March 31, 2017

Principal	$	210,000
Unamortized debt discount (conversion option)		(9,003	)
Total long-term debt, net		200,997
Unamortized debt discount (issuance costs)		(5,152	)
Net carrying amount	$	195,845

Debt Facilities

The following table summarizes the Company's debt facilities as of March 31, 2017 and December 31, 2016:

Facility or Arrangement	Original Principal Amount	Balance as of March 31, 2017⁽¹⁾⁽²⁾	Balance as of December 31, 2016	Interest Rate	Repayment terms

Credit Agreement term loan facility:

U.S. dollar denominated:	$127.5 million	$105.2 million	$108.4 million	Variable 30 day: 3.73%	One half of the principal amount payable in increasing quarterly installments over a five-year period beginning on December 31, 2014, with the remainder payable at the end of the five-year term.

Japanese yen denominated:	6.6 billion yen	5.4 billion yen ($48.8 million as of March 31, 2017)	5.6 billion yen ($47.9 million as of December 31, 2016)	Variable 30 day: 2.76%	One half of the principal amount payable in increasing quarterly installments over a five-year period beginning on December 31, 2014, with the remainder payable at the end of the five-year term.

Credit Agreement revolving credit facility:

		$72.5 million	$47.5 million	Variable 30 day: 3.73%	Revolving line of credit expires October 2019.

Korea subsidiary loan:	$20.0 million	—	$10.0 million	1.12%	Loan paid in full as of March 2017.

Japan subsidiary loan:	2.0 billion yen	1.0 billion yen ($9.0 million as of March 31, 2017)	1.3 billion yen ($11.4 million as of December 31, 2016)	0.66%	Payable in semi-annual installments over three years that began on January 31, 2016.

Convertible note	$210.0 million	$210.0 million	$210.0 million	4.75%	Principal amount payable on June 15, 2020.

⁽¹⁾

⁽²⁾

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

+ Details

FAIR VALUE (Tables)

3 Months Ended

Mar. 31, 2017

FAIR VALUE [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables present the fair value hierarchy for those assets and liabilities measured at fair value on a recurring basis (U.S. dollars in thousands):

	Fair Value at March 31, 2017
	Level 1		Level 2		Level 3		Total

Financial assets (liabilities):
Cash equivalents and current investments	$	37,947	$	—	$	—	$	37,947
Other long-term assets		3,557		—		—		3,557
Forward contracts		—		339		—		339
Life insurance contracts		—		—		34,024		34,024
Total	$	41,504	$	339	$	34,024	$	75,867

	Fair Value at December 31, 2016
	Level 1		Level 2		Level 3		Total

Financial assets (liabilities):
Cash equivalents and current investments	$	50,307	$	—	$	—	$	50,307
Other long-term assets		2,782		—		—		2,782
Forward contracts		—		1,371		—		1,371
Life insurance contracts		—		—		32,286		32,286
Total	$	53,089	$	1,371	$	32,286	$	86,746

Changes in Fair Value of Marketable Securities

The following table provides a summary of changes in fair value of the Company's Level 3 marketable securities (U.S. dollars in thousands):

Life Insurance Contracts

Beginning balance at January 1, 2017	$	32,286
Actual return on plan assets:
Relating to assets still held at the reporting date		1,535
Purchases and issuances		314
Sales and settlements		(111	)
Transfers into Level 3		—
Ending balance at March 31, 2017	$	34,024

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

THE COMPANY (Details)	3 Months Ended
THE COMPANY (Details)	Mar. 31, 2017 Segment
THE COMPANY [Abstract]
Number of segments	7

NET INCOME PER SHARE (Details) - shares shares in Millions	3 Months Ended
NET INCOME PER SHARE (Details) - shares shares in Millions	Mar. 31, 2017	Mar. 31, 2016
Stock Options [Member]
Net Income per Share [Abstract]
Anti-dilutive shares excluded from calculation of diluted earnings per share (in shares)	0.8	2.6

DIVIDENDS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended
	May 03, 2017	Mar. 15, 2017	Feb. 28, 2017	Mar. 31, 2017	Mar. 31, 2016
Dividends per Share [Abstract]
Payment of cash dividends				$ 18,987	$ 19,840
Dividend Declared 2017-Q1 [Member]
Dividends per Share [Abstract]
Dividend payable, date declared				2017-02
Dividend payable per share (in dollars per share)			$ 0.36
Payment of cash dividends		$ 19,000
Dividend payable, date to be paid				Mar. 15, 2017
Dividend payable, date of record				Feb. 27, 2017
Dividend Declared 2017-Q2 [Member] \| Subsequent Event [Member]
Dividends per Share [Abstract]
Dividend payable, date declared	2016-05
Dividend payable per share (in dollars per share)	$ 0.36
Dividend payable, date to be paid	Jun. 14, 2017
Dividend payable, date of record	May 26, 2017

DERIVATIVE FINANCIAL INSTRUMENTS (Details) $ in Thousands, € in Millions, ¥ in Millions, ₩ in Billions	3 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2017 JPY (¥)	Dec. 31, 2016 USD ($)	Mar. 31, 2016 JPY (¥)	Mar. 31, 2016 EUR (€)	Mar. 31, 2016 KRW (₩)
Foreign Currency Derivatives [Abstract]
Unrealized gains/(losses) related to foreign currency cash flow hedges included in accumulated other comprehensive loss	$ 200			$ 600
Cumulative translation adjustments included in accumulated other comprehensive loss	75,000			$ 84,700
Foreign Currency Forward Contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Fair Value Hedges [Member] \| Japanese Yen [Member]
Foreign Currency Derivatives [Abstract]
Notional amount		$ 4,400			¥ 500
Foreign Currency Forward Contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Fair Value Hedges [Member] \| Korean Won [Member]
Foreign Currency Derivatives [Abstract]
Notional amount		5,000					₩ 5.8
Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedges [Member]
Foreign Currency Derivatives [Abstract]
Fair value	$ 300	2,000
Term to recognize gains (losses) in current earnings	13 months
Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedges [Member] \| Japanese Yen [Member]
Foreign Currency Derivatives [Abstract]
Notional amount	$ 20,600	34,600	¥ 2,300		¥ 3,900
Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedges [Member] \| Euros [Member]
Foreign Currency Derivatives [Abstract]
Notional amount		13,700				€ 12.0
Foreign Currency Forward Contracts [Member] \| Other Comprehensive Loss [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedges [Member]
Foreign Currency Derivatives [Abstract]
Gain (loss) recognized in other comprehensive income (loss)	(387)	(1,690)
Foreign Currency Forward Contracts [Member] \| Other Income (Expense) [Member] \| Not Designated as Hedging Instrument [Member] \| Fair Value Hedges [Member]
Foreign Currency Derivatives [Abstract]
Gain (loss) recognized in income	(485)	(4)
Foreign Currency Forward Contracts [Member] \| Revenue [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedges [Member]
Foreign Currency Derivatives [Abstract]
Gain (loss) reclassified from accumulated other comprehensive loss into income	(25)	(78)
Foreign Currency Forward Contracts [Member] \| Selling Expenses [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedges [Member]
Foreign Currency Derivatives [Abstract]
Gain (loss) reclassified from accumulated other comprehensive loss into income	$ (41)	$ (107)

REPURCHASES OF COMMON STOCK (Details) - Common Class A [Member] - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Repurchases of Common Stock [Abstract]
Common stock repurchased (in shares)	0.1	0.6
Common stock repurchased	$ 6.8	$ 20.0
Available for repurchase under the repurchase program	$ 192.9

SEGMENT INFORMATION, Revenue by Segment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) Segment Market	Mar. 31, 2016 USD ($)
SEGMENT INFORMATION [Abstract]
Number of markets \| Market	50
Number of segments \| Segment	7
Revenue by Segment [Abstract]
Revenue	$ 499,099	$ 471,831
Operating Segment [Member]
Revenue by Segment [Abstract]
Revenue	499,099	471,831
Operating Segment [Member] \| Mainland China [Member]
Revenue by Segment [Abstract]
Revenue	150,004	118,655
Operating Segment [Member] \| South Korea [Member]
Revenue by Segment [Abstract]
Revenue	82,471	86,118
Operating Segment [Member] \| South Asia/Pacific [Member]
Revenue by Segment [Abstract]
Revenue	69,798	63,578
Operating Segment [Member] \| Americas [Member]
Revenue by Segment [Abstract]
Revenue	65,658	65,748
Operating Segment [Member] \| Japan [Member]
Revenue by Segment [Abstract]
Revenue	61,156	65,091
Operating Segment [Member] \| Hong Kong/Taiwan [Member]
Revenue by Segment [Abstract]
Revenue	35,948	40,056
Operating Segment [Member] \| EMEA [Member]
Revenue by Segment [Abstract]
Revenue	$ 34,064	$ 32,585

SEGMENT INFORMATION, Segment Contribution (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Contribution [Abstract]
Operating income	$ 46,262	$ 8,149
Other income (expense)	(4,567)	(2,863)
Income before provision for income taxes	41,695	5,286
Operating Segment [Member]
Segment Contribution [Abstract]
Operating income	103,315	86,035
Operating Segment [Member] \| Mainland China [Member]
Segment Contribution [Abstract]
Operating income	35,427	18,301
Operating Segment [Member] \| South Korea [Member]
Segment Contribution [Abstract]
Operating income	24,512	24,057
Operating Segment [Member] \| South Asia Pacific [Member]
Segment Contribution [Abstract]
Operating income	13,980	12,453
Operating Segment [Member] \| Americas [Member]
Segment Contribution [Abstract]
Operating income	10,096	10,472
Operating Segment [Member] \| Japan [Member]
Segment Contribution [Abstract]
Operating income	12,426	12,047
Operating Segment [Member] \| Hong Kong/Taiwan [Member]
Segment Contribution [Abstract]
Operating income	5,083	8,358
Operating Segment [Member] \| EMEA [Member]
Segment Contribution [Abstract]
Operating income	1,791	347
Segment Reconciling Item [Member]
Segment Contribution [Abstract]
Other income (expense)	(4,567)	(2,863)
Segment Reconciling Item [Member] \| Corporate and Other [Member]
Segment Contribution [Abstract]
Operating income	$ (57,053)	$ (77,886)

SEGMENT INFORMATION, Depreciation and Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Summarized Financial Information [Abstract]
Depreciation and amortization	$ 17,625	$ 16,945
Capital expenditures	15,928	10,942
Corporate and Other [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	9,475	8,294
Capital expenditures	13,268	3,785
Reportable Geographic Region [Member] \| Mainland China [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	3,971	4,027
Capital expenditures	903	4,900
Reportable Geographic Region [Member] \| South Korea [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	1,632	1,641
Capital expenditures	448	270
Reportable Geographic Region [Member] \| South Asia/Pacific [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	563	563
Capital expenditures	183	277
Reportable Geographic Region [Member] \| Americas [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	530	659
Capital expenditures	251	278
Reportable Geographic Region [Member] \| Japan [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	880	893
Capital expenditures	76	739
Reportable Geographic Region [Member] \| Hong Kong/Taiwan [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	302	564
Capital expenditures	606	228
Reportable Geographic Region [Member] \| EMEA [Member]
Summarized Financial Information [Abstract]
Depreciation and amortization	272	304
Capital expenditures	$ 193	$ 465

SEGMENT INFORMATION, Revenue by Major Market (Details)	3 Months Ended
SEGMENT INFORMATION, Revenue by Major Market (Details)	Mar. 31, 2017 Market
SEGMENT INFORMATION [Abstract]
Number of major markets	3
Number of markets	50

SEGMENT INFORMATION, Revenue by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenue by Product Line [Abstract]
Revenue	$ 499,099	$ 471,831
Nu Skin [Member]
Revenue by Product Line [Abstract]
Revenue	301,873	289,989
Pharmanex [Member]
Revenue by Product Line [Abstract]
Revenue	196,103	180,714
Other [Member]
Revenue by Product Line [Abstract]
Revenue	$ 1,123	$ 1,128

SEGMENT INFORMATION, Long-Lived Assets by Major Market (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Long-Lived Assets by Major Market [Abstract]
Long-lived assets	$ 450,607	$ 444,732
Major Markets [Member] \| United States [Member]
Long-Lived Assets by Major Market [Abstract]
Long-lived assets	289,228	283,868
Major Markets [Member] \| Mainland China [Member]
Long-Lived Assets by Major Market [Abstract]
Long-lived assets	95,458	97,867
Major Markets [Member] \| South Korea [Member]
Long-Lived Assets by Major Market [Abstract]
Long-lived assets	44,280	41,545
Major Markets [Member] \| Japan [Member]
Long-Lived Assets by Major Market [Abstract]
Long-lived assets	11,250	11,517
Major Markets [Member] \| All Other Countries [Member]
Long-Lived Assets by Major Market [Abstract]
Long-lived assets	$ 10,391	$ 9,935

GOODWILL (Details)
$ in Thousands

3 Months Ended

Mar. 31, 2017

USD ($)

Segment

Dec. 31, 2016

USD ($)

Goodwill [Abstract]

Number of segments | Segment

Goodwill

$ 114,954

Mainland China [Member]

Goodwill [Abstract]

Goodwill

32,179

^[1]

South Korea [Member]

Goodwill [Abstract]

Goodwill

29,261

^[1]

South Asia/Pacific [Member]

Goodwill [Abstract]

Goodwill

18,537

^[1]

Americas [Member]

Goodwill [Abstract]

Goodwill

9,449

^[1]

Japan [Member]

Goodwill [Abstract]

Goodwill

16,019

^[1]

Hong Kong/Taiwan [Member]

Goodwill [Abstract]

Goodwill

6,634

^[1]

EMEA [Member]

Goodwill [Abstract]

Goodwill

$ 2,875

^[1]

[1]	Goodwill was recast to reflect current period presentation by geographic region at December 31, 2016.

INVENTORY (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Inventories [Abstract]
Raw materials	$ 104,177	$ 108,276
Finished goods	147,770	141,660
Inventories	$ 251,947	$ 249,936

DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
DEFERRED TAX ASSETS AND LIABILITIES [Abstract]
Net deferred tax assets	$ 31.7	$ 35.1
Undistributed foreign earnings indefinitely reinvested		70.0
Incremental taxes on indefinitely reinvested foreign earnings		$ 7.6

UNCERTAIN TAX POSITIONS (Details)	3 Months Ended
UNCERTAIN TAX POSITIONS (Details)	Mar. 31, 2017
UNCERTAIN TAX POSITIONS [Abstract]
Statute period for transfer pricing related issues	10 years

DEBT, Credit Agreement (Details)
$ in Millions, ¥ in Billions

3 Months Ended

Mar. 31, 2017

USD ($)

Mar. 31, 2017

JPY (¥)

Dec. 31, 2016

USD ($)

Dec. 31, 2016

JPY (¥)

Dec. 31, 2015

USD ($)

Oct. 09, 2014

USD ($)

Oct. 09, 2014

JPY (¥)

Credit Agreement [Member] | Maximum [Member]

Debt [Abstract]

Consolidated leverage ratio

2.25

Credit Agreement [Member] | Minimum [Member]

Debt [Abstract]

Consolidated interest coverage ratio

3.00

Term Loan Facility [Member]

Debt [Abstract]

Original principal amount

$ 127.5

Term of facility

5 years

Outstanding balance

$ 105.2

^[1],[2]

$ 108.4

Japanese Yen Term Loan Facility [Member]

Debt [Abstract]

Original principal amount | ¥

¥ 6.6

Term of facility

5 years

Outstanding balance

$ 48.8

^[1],[2]

¥ 5.4

^[1],[2]

47.9

¥ 5.6

Revolving Credit Facility [Member]

Debt [Abstract]

Borrowing capacity

$ 187.5

Term of facility

5 years

Outstanding balance

$ 72.5

^[1],[2]

$ 47.5

[1]

[2]

Debt, Convertible Note (Details)

3 Months Ended

Jun. 16, 2016

USD ($)

Mar. 31, 2017

USD ($)

$ / shares

Mar. 31, 2016

USD ($)

Dec. 31, 2016

USD ($)

Net Carrying Amount of Liability Component [Abstract]

Unamortized debt discount (conversion option)

$ (11,900,000)

Unamortized debt discount (issuance costs)

(5,152,000)

Debt issuance costs

17,830,000

$ 15,308,000

Convertible Note [Member]

Convertible Debt [Abstract]

Original principal amount

$ 210,000,000

Interest rate

4.75%

Maturity date

Jun. 15, 2020

Redemption price, percentage of principal amount redeemed

100.00%

Threshold percentage of stock price trigger

180.00%

Threshold trading days | d

Threshold final trading days | d

Threshold consecutive trading days

30 days

Principal amount increments that can be repurchased upon a change in control or termination of trading of common stock

$ 1,000

Principal amount increments that can be converted

$ 1,000

Holding period following issue date before notes can be converted

6 months

Initial conversion rate (in shares) | shares

21.5054

Initial conversion price (in dollars per share) | $ / shares

$ 46.50

Proceeds from issuance of notes

210,000,000

Liability component of convertible notes

199,100,000

Equity component of convertible notes allocated to additional paid-in capital

$ 10,900,000

Effective interest rate

7.10%

Net Carrying Amount of Liability Component [Abstract]

Principal

$ 210,000,000

^[1],[2]

$ 210,000,000

Unamortized debt discount (conversion option)

(9,003,000)

Total long-term debt, net

200,997,000

Unamortized debt discount (issuance costs)

(5,152,000)

Net carrying amount

195,845,000

Debt issuance costs

6,600,000

Additions to deferred financing cost

6,300,000

Adjustments to additional paid-in capital for debt issuance costs

300,000

Interest expense

3,500,000

Contractual interest

2,500,000

Amortization of debt issuance costs and debt discount

$ 1,000,000

[1]

[2]

Debt, Debt Facilities (Details)
$ in Thousands, ¥ in Billions

3 Months Ended

Mar. 31, 2017

USD ($)

Mar. 31, 2017

JPY (¥)

Dec. 31, 2016

USD ($)

Dec. 31, 2016

JPY (¥)

Jun. 16, 2016

USD ($)

Dec. 31, 2015

USD ($)

Oct. 09, 2014

USD ($)

Oct. 09, 2014

JPY (¥)

Debt [Abstract]

Current portion of debt

$ 99,482

$ 82,727

Unamortized debt discount

11,900

Unamortized debt issuance costs

5,152

Credit Agreement [Member]

Debt [Abstract]

Unamortized debt discount and debt issuance costs

2,900

Term Loan Facility [Member]

Debt [Abstract]

Original principal amount

127,500

$ 127,500

Balance

$ 105,200

^[1],[2]

108,400

Interest rate

Variable 30 day: 3.73%

Interest rate

3.73%

Term of variable rate

30 days

Repayment terms

One half of the principal amount payable in increasing quarterly installments over a five-year period beginning on December 31, 2014, with the remainder payable at the end of the five-year term.

Percentage of principal payable in installments

50.00%

Frequency of payment

Quarterly

Term of loan

5 years

Current portion of debt

$ 14,300

Japanese Yen Term Loan Facility [Member]

Debt [Abstract]

Original principal amount | ¥

¥ 6.6

Balance

$ 48,800

^[1],[2]

¥ 5.4

^[1],[2]

47,900

¥ 5.6

Interest rate

Variable 30 day: 2.76%

Interest rate

2.76%

Term of variable rate

30 days

Repayment terms

One half of the principal amount payable in increasing quarterly installments over a five-year period beginning on December 31, 2014, with the remainder payable at the end of the five-year term.

Percentage of principal payable in installments

50.00%

Frequency of payment

Quarterly

Term of loan

5 years

Current portion of debt

$ 6,700

Revolving Credit Facility [Member]

Debt [Abstract]

Balance

$ 72,500

^[1],[2]

47,500

$ 47,500

Interest rate

Variable 30 day: 3.73%

Interest rate

3.73%

Term of variable rate

30 days

Repayment terms

Revolving line of credit expires October 2019.

Term of loan

5 years

Korean Subsidiary Loan [Member]

Debt [Abstract]

Original principal amount

$ 20,000

Balance

$ 0

^[1],[2]

10,000

Interest rate

1.12%

Repayment terms

Loan paid in full as of March 2017.

Japan Subsidiary Loan [Member]

Debt [Abstract]

Original principal amount | ¥

¥ 2.0

Balance

$ 9,000

^[1],[2]

¥ 1.0

^[1],[2]

11,400

¥ 1.3

Interest rate

0.66%

Repayment terms

Payable in semi-annual installments over three years that began on January 31, 2016.

Frequency of payment

Semi-annual

Term of loan

3 years

Current portion of debt

$ 6,000

Convertible Note [Member]

Debt [Abstract]

Original principal amount

210,000

$ 210,000

Balance

$ 210,000

^[1],[2]

$ 210,000

Interest rate

7.10%

Interest rate

4.75%

Repayment terms

Principal amount payable on June 15, 2020.

Unamortized debt discount

$ 9,003

Unamortized debt issuance costs

5,152

Unamortized debt discount and debt issuance costs

$ 14,200

[1]

[2]

FAIR VALUE (Details) - USD ($) $ in Thousands	3 Months Ended
FAIR VALUE (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value on a Recurring Basis [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	$ 37,947	$ 50,307
Other long term assets	3,557	2,782
Forward contracts	339	1,371
Life insurance contracts	34,024	32,286
Financial assets (liabilities), net	75,867	86,746
Fair Value on a Recurring Basis [Member] \| Level 1 [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	37,947	50,307
Other long term assets	3,557	2,782
Forward contracts	0	0
Life insurance contracts	0	0
Financial assets (liabilities), net	41,504	53,089
Fair Value on a Recurring Basis [Member] \| Level 2 [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	0	0
Other long term assets	0	0
Forward contracts	339	1,371
Life insurance contracts	0	0
Financial assets (liabilities), net	339	1,371
Fair Value on a Recurring Basis [Member] \| Level 3 [Member]
Financial Assets (Liabilities) [Abstract]
Cash equivalents and current investments	0	0
Other long term assets	0	0
Forward contracts	0	0
Life insurance contracts	34,024	32,286
Financial assets (liabilities), net	34,024	$ 32,286
Life Insurance Contracts [Member]
Changes in Fair Value of Level 3 Marketable Securities [Roll Forward]
Beginning balance	32,286
Actual Return on Plan Assets [Abstract]
Relating to assets still held at the reporting date	1,535
Purchases and issuances	314
Sales and settlements	(111)
Transfers into Level 3	0
Ending balance	$ 34,024

ACCOUNTING PRONOUNCEMENTS (Details) - Accounting Standards Update 2016-09 [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Accounting Pronouncements [Abstract]
Excess tax benefits	$ 0.8
Retained Earnings [Member]
Accounting Pronouncements [Abstract]
Cumulative adjustment		$ (2.8)
Additional Paid-in Capital [Member]
Accounting Pronouncements [Abstract]
Cumulative adjustment		$ 2.8

COST OF SALES (Details) - USD ($) $ in Thousands	3 Months Ended
COST OF SALES (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
COST OF SALES [Abstract]
Customs expense	$ 0	$ 31,355

ACQUISITION AND INVESTMENT IN EQUITY INVESTEE (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Feb. 28, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Acquisition [Abstract]
Cash paid for acquisition		$ 0	$ 3,300
Goodwill		$ 114,954		$ 114,954
Vertical Eden, LLC [Member]
Acquisition [Abstract]
Percentage of entity acquired			70.00%
Cash paid for acquisition			$ 3,300
Contingent consideration			1,500
Intangible assets			4,400
Goodwill			2,500
Non-controlling interest			$ 2,100
Vertical Eden, LLC [Member] \| Minimum [Member]
Acquisition [Abstract]
Useful life			3 years
Vertical Eden, LLC [Member] \| Maximum [Member]
Acquisition [Abstract]
Useful life			7 years
Treviso, LLC [Member]
Acquisition [Abstract]
Percentage of entity acquired	35.00%
Purchase price	$ 21,000
Possible earn out	1,000
Cash paid for acquisition	12,600
Value of shares issued	$ 8,400
Number of shares issued (in shares	169,560
Share price (in dollars per share)	$ 49.54