REVENUE (Revenue by Interconnect Protocol) (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
Remaining service period			remaining service period of up to five years
InfiniBand:
Disaggregation of Revenue [Line Items]
Total revenues	132,881	102,111	$ 271,019	205,249
HDR
Disaggregation of Revenue [Line Items]
Total revenues	28,620	0	51,813	0
EDR
Disaggregation of Revenue [Line Items]
Total revenues	66,643	59,319	126,286	115,265
FDR
Disaggregation of Revenue [Line Items]
Total revenues	28,972	35,649	69,570	77,397
QDR/DDR/SDR
Disaggregation of Revenue [Line Items]
Total revenues	8,646	7,143	23,350	12,587
Ethernet
Disaggregation of Revenue [Line Items]
Total revenues	169,131	157,470	330,024	294,418
Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 8,312	$ 8,881	$ 14,498	$ 19,795