Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
NET INCOME	$ 26,649	$ 28,167	$ 57,402	$ 57,273
OTHER COMPREHENSIVE INCOME (LOSS), net of tax:
Foreign currency translation adjustments	28	53	(101)	5
Unrealized (loss) gain on investments	(22)	1,431	(243)	592
Total other comprehensive income (loss)	6	1,484	(344)	597
COMPREHENSIVE INCOME	$ 26,655	$ 29,651	$ 57,058	$ 57,870