CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 53,048	$ 43,751	$ 128,216	$ 122,667
Other comprehensive income (loss), net of tax:
Net change related to available-for-sale securities	29	(210)	(1,847)	556
Net change related to cash flow hedges	308	(446)	619
Foreign currency translation adjustments on intra-entity transactions that are of a long-term investment nature	(12,272)		(14,168)
Foreign currency translation adjustments, net	(3,664)	1,455	(7,596)	(1,390)
Total other comprehensive income (loss)	(15,599)	799	(22,992)	(834)
Comprehensive income	$ 37,449	$ 44,550	$ 105,224	$ 121,833