Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 33,331	$ 145,726	$ 723,262	$ 447,062
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities, net	(9,575)	9,949	(32,633)	21,139
Reclassification of realized (gain) loss on available-for-sale securities, net into net income	0	(823)	0	(5,325)
Comprehensive income	23,756	154,852	690,629	462,876
Comprehensive income attributable to noncontrolling interests	14,182	10,053	19,791	19,447
Dividends on preferred stock	22,427	14,358	44,888	28,716
Comprehensive income (loss) attributable to common stockholders	$ (12,853)	$ 130,441	$ 625,950	$ 414,713