REVENUE (Revenue by Geographic Location) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 335,251	$ 279,211	$ 950,792	$ 798,673
United States
Disaggregation of Revenue [Line Items]
Total revenues	126,904	93,566	358,816	291,222
China
Disaggregation of Revenue [Line Items]
Total revenues	98,978	76,514	268,986	186,909
Europe
Disaggregation of Revenue [Line Items]
Total revenues	35,227	51,123	120,816	128,573
Other Americas
Disaggregation of Revenue [Line Items]
Total revenues	34,739	39,709	88,551	100,561
Other Asia
Disaggregation of Revenue [Line Items]
Total revenues	$ 39,403	$ 18,299	$ 113,623	$ 91,408