CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 164,031	$ 102,859	$ 77,916
Other comprehensive income (loss), net of tax:
Foreign currency translation	112	(21)	1
Unrealized gains (losses) on investment securities	(42)	37	197
Other comprehensive income (loss)	70	16	198
Comprehensive income	$ 164,101	$ 102,875	$ 78,114