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INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. statutory income tax rate	21.00%	21.00%	35.00%
State income taxes, net of federal benefit	(0.20%)	(0.10%)	1.20%
Foreign income taxes	(1.00%)	(5.70%)	(0.50%)
Acquisition costs	(0.50%)	(0.30%)	(6.00%)
Foreign deemed dividends	(0.40%)	(3.40%)	(3.80%)
Stock-based compensation	(0.70%)	(0.30%)	26.80%
Tax credits	2.80%	0.60%	(33.30%)
Uncertain tax positions	(0.20%)	1.30%	(1.20%)
NOL and credit limitations	0.00%	0.00%	(18.90%)
Valuation allowance	(0.70%)	(16.10%)	29.00%
Goodwill amortization	0.40%	0.30%	(1.70%)
Meals and entertainment	(0.30%)	(0.40%)	(0.50%)
Tax reform	(0.001)	0.000	0.088
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent	(25.40%)	0.00%	0.00%
Other, net	(0.50%)	(1.50%)	(0.60%)
Effective income tax rate	(5.80%)	(4.60%)	34.30%

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