CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income (loss)	$ 223,083	$ 618,609	$ (120,424)
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the year, net of reclassification adjustment	(805,850)	(358,480)	239,114
Foreign currency translation adjustment	(10,986)	621	3,571
Total other comprehensive income (loss), net of tax	(816,836)	(357,859)	242,685
Comprehensive income (loss)	(593,753)	260,750	122,261
Unrealized gains (losses) on available for sale investments
Other comprehensive income (loss), net of tax:
Adjustment for reclassification of net realized (gains) losses and impairment losses recognized in net income (loss)	304,925	(87,114)	(78,012)
Unrealized gains (losses) arising during the year, net of reclassification adjustment	(805,850)	(358,480)	239,114
Unrealized gains (losses) on available for sale investments | Unrealized gains (losses) arising during the year for which an allowance for expected credit losses has not been recognized
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the year	(1,043,625)	(271,447)	317,166
Unrealized gains (losses) on available for sale investments | Unrealized gains (losses) arising during the year for which an allowance for expected credit losses has been recognized
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) arising during the year	$ (67,150)	$ 81	$ (40)