Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Residential mortgage loans, held-for-sale, fair value		$ 4,705,816
Notes and bonds payable, fair value	$ 1,260,557	$ 1,662,852
Liquidation preference	$ 840,250
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	414,797,263	414,744,518
Common stock, shares outstanding (in shares)	414,797,263	414,744,518
Assets	$ 35,184,129	$ 33,252,114
Liabilities	29,562,316	27,822,430
Variable Interest Entity, Primary Beneficiary
Assets	2,193,494	2,678,385
Liabilities	$ 1,662,796	$ 2,090,400
7.50% Series A Preferred Stock, 7.125% Series B Preferred Stock, And 6.375% Series C Preferred Stock
Preferred stock, par values (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	39,100,000	39,100,000
Preferred stock, shares issued (in shares)		33,610,000
Preferred stock, shares outstanding (in shares)	33,610,000
Liquidation preference		$ 840,250	$ 840,250