REVENUE - Revenue by Interconnect Protocol (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
InfiniBand:
Disaggregation of Revenue [Line Items]
Total revenues	565,930	438,359	407,325
HDR
Disaggregation of Revenue [Line Items]
Total revenues	142,127	10,177	0
EDR
Disaggregation of Revenue [Line Items]
Total revenues	273,045	234,655	194,261
FDR
Disaggregation of Revenue [Line Items]
Total revenues	125,530	149,168	181,465
QDR/DDR/SDR
Disaggregation of Revenue [Line Items]
Total revenues	25,228	44,359	31,599
Ethernet
Disaggregation of Revenue [Line Items]
Total revenues	743,899	618,471	401,005
Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 20,747	$ 31,913	$ 55,563