REVENUE - Revenue by Product Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,330,576	$ 1,088,743	$ 863,893
ICs
Disaggregation of Revenue [Line Items]
Total revenues	216,726	149,180	161,216
Boards
Disaggregation of Revenue [Line Items]
Total revenues	532,584	495,753	325,845
Switch systems
Disaggregation of Revenue [Line Items]
Total revenues	329,529	247,478	222,836
Cables, accessories and other
Disaggregation of Revenue [Line Items]
Total revenues	$ 251,737	$ 196,332	$ 153,996