Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 49,387	$ 58,293	$ 25,791
Other comprehensive income, before tax:
Change in unrealized gains and losses on derivatives	215	(64)	30
Change in unrealized gains and losses on available-for-sale investments	0	0	16
Other comprehensive income (loss), before tax	215	(64)	46
Tax benefit (provision) related to derivatives	(31)	8	(6)
Tax provision related to available-for-sale investments	0	0	(4)
Other comprehensive income (loss), net of tax	184	(56)	36
Comprehensive income	$ 49,571	$ 58,237	$ 25,827