REVENUE (Revenue by Geographic Location) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 310,324	$ 268,462	$ 615,541	$ 519,462
United States
Disaggregation of Revenue [Line Items]
Total revenues	121,618	101,396	231,912	197,656
China
Disaggregation of Revenue [Line Items]
Total revenues	91,868	54,182	170,008	110,395
Europe
Disaggregation of Revenue [Line Items]
Total revenues	38,343	41,454	85,589	77,450
Other Americas
Disaggregation of Revenue [Line Items]
Total revenues	28,082	33,112	53,811	60,852
Other Asia
Disaggregation of Revenue [Line Items]
Total revenues	$ 30,413	$ 38,318	$ 74,221	$ 73,109