Income taxes.

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State and foreign income tax returns subject to examination period maximum.

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State and foreign income tax returns subject to examination period minimum.

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Withholding and interest for licencing and royalty payments period.

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Withholding and interest licensing and royalty payments.

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Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
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-Section S99
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The amount of the additional liability or refund received or expected based on a final settlement with a taxing authority.

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Amount of noncurrent assets classified as other.

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-SubTopic 10
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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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-SubTopic 10
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-Paragraph 20
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INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Long-term asset		$ 86,090	$ 64,526
Withholding and interest for licencing and royalty payments	$ 13,200
Withholding and interest for licencing and royalty payments period	3 years
Current income tax expense		$ 16,514	8,677	$ 15,406
State and foreign income tax returns subject to examination period minimum (in years)		3 years
State and foreign income tax returns subject to examination period maximum (in years)		4 years
Reduction of Korean Withholding Taxes [Member]
Income Taxes [Line Items]
Reduction of deferred tax asset for foreign tax credits and R&D		$ 20,700	20,700
Korean Government [Member]
Income Taxes [Line Items]
Estimated settlement amounts due (refunds) from withholding taxes			(36,900)
U.S.Federal Government [Member]
Income Taxes [Line Items]
Estimated settlement amounts due (refunds) from withholding taxes			16,200
South Korea [Member]
Income Taxes [Line Items]
Current income tax expense		14,900	14,900	$ 17,600
Allocation of Withholding to Non-Korean Patents [Member]
Income Taxes [Line Items]
Long-term asset		26,900	13,600
Allocation of Withholding to Non-Korean Patents [Member] \| U.S.Federal Government [Member]
Income Taxes [Line Items]
Estimated settlement amounts due (refunds) from withholding taxes		$ 25,700	$ 7,700