Investments in Unconsolidated Entities (Summarized Financial Information Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Net income (loss) attributable to common stockholders	$ 20,564	$ 46,203	$ 91,075	$ (45,917)
Significant non-consolidated entity | Mortgage loan originator
Schedule of Equity Method Investments [Line Items]
Revenues	(21,954)	114,064	168,664	240,739
Net income (loss) attributable to common stockholders	$ (8,243)	$ 15,962	$ 23,469	$ 28,901