CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (19,381)	$ 2,133
Change in net unrealized gains (losses) on investments, available-for-sale, net of tax	(7,200)	(4,028)
Comprehensive income (loss)	$ (26,581)	$ (1,895)