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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 102,859	$ 77,916	$ 55,789
Other comprehensive income (loss), net of tax:
Foreign currency translation	(21)	1	(2)
Unrealized gains (losses) on investment securities	37	197	(11)
Other comprehensive income (loss)	16	198	(13)
Comprehensive income	$ 102,875	$ 78,114	$ 55,776

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