Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
NET INCOME	$ 30,753	$ 29,106
OTHER COMPREHENSIVE (LOSS) INCOME, net of tax:
Foreign currency translation adjustments	(129)	(48)
Unrealized loss on investments	(221)	(839)
Total other comprehensive loss	(350)	(887)
COMPREHENSIVE INCOME	$ 30,403	$ 28,219