Condensed Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 16,616	$ 4,109
Unrealized losses on available-for-sale securities, net of taxes of $29,898 and $4,903 for three months ended March 31, 2022 and 2021, respectively	(73,197)	(12,005)
Less: reclassification adjustment for realized gains included in net income, net of taxes of $0 and $1 for three months ended March 31, 2022 and 2021, respectively		(3)
Other comprehensive loss, net of taxes	(73,197)	(12,008)
Comprehensive loss	$ (56,581)	$ (7,899)