CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (103,100)	$ (78,158)	$ 1,011
Change in net unrealized gains (losses) on investments, available-for-sale, net of tax	(12,420)	1,105	14,031
Comprehensive income (loss)	$ (115,520)	$ (77,053)	$ 15,042