Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 154,190	$ 170,681	$ 877,452	$ 617,743
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities, net	(9,283)	6,541	(41,916)	27,680
Reclassification of realized (gain) loss on available-for-sale securities, net into net income	0	(63)	0	(5,388)
Comprehensive income	144,907	177,159	835,536	640,035
Comprehensive income attributable to noncontrolling interests	7,307	9,001	27,098	28,448
Dividends on preferred stock	22,427	15,533	67,315	44,249
Comprehensive income attributable to common stockholders	$ 115,173	$ 152,625	$ 741,123	$ 567,338