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INCOME TAXES - Reconciliation of the Statutory U.S. Federal Tax Rate to the Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Statutory U.S. federal income tax rate	21.00%	21.00%	35.00%
State income taxes, net of federal benefit	0.10%	(0.20%)
Effect of foreign operations	(5.40%)	(4.70%)	(7.10%)
Accruals and reserves	(1.10%)		0.10%
Nondeductible employee compensation	2.50%	1.70%	1.50%
Research tax credits	(1.40%)	(2.70%)	(0.70%)
Change in valuation allowance			(4.10%)
Stock based compensation	(1.70%)	(2.70%)	(1.90%)
U.S. Tax Cuts and Jobs Act		(3.50%)	7.70%
U.S. International Tax (Sub F, GILTI, FDII)	3.80%	(1.20%)
Other	0.80%	0.80%
Effective tax rate	18.60%	8.50%	30.50%

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Effective income tax rate reconciliation change in accruals and reserves percent.

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Effective income tax rate reconciliation deduction share based compensation cost percent.

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Effective income tax rate reconciliation US tax cuts and jobs act.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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