Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 135,103	$ 173,438	$ 245,613	$ 511,125
Unrealized gains (losses) on investments:
Unrealized holding gains (losses) arising during the period for which an allowance for expected losses has not been recognized	30,839	40,654	143,602	190,677
Net decrease (increase) in expected credit losses	147	0	(2,051)	0
Net unrealized gains (losses) on investments	19,808	37,177	121,481	186,562
Other comprehensive income (loss), net of tax	19,808	37,177	121,481	186,559
Comprehensive income	154,911	210,615	367,094	697,684
Net foreign currency translation adjustments	0	0	0	(3)
Net realized gains (losses) on disposals and non-credit related impairment losses	$ 10,884	$ 3,477	$ 24,172	$ 4,115