CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Restricted cash, amounts related to VIEs	$ 20,434,000	$ 20,968,000
Mortgage servicing rights, at fair value	1,486,395,000	1,457,149,000
Loans held for sale, at fair value	208,752,000	176,525,000
Loans held for investment	6,292,938,000	5,498,719,000
Other assets, at fair value	8,524,000	7,568,000
Other assets, amounts related to VIEs	4,078,000	2,874,000
Other secured borrowings, net	1,025,791,000	448,061,000
Other financing liabilities	972,595,000	1,062,090,000
Other financing liabilities, at fair value	972,595,000	1,057,671,000
Other liabilities, at fair value	100,000	4,986,000
Other liabilities, related to VIEs	$ 942,173,000	$ 703,636,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	134,862,232	133,912,425
Common stock, shares outstanding (in shares)	134,862,232	133,912,425
Residential Mortgage Backed Securitization Trusts
Loans held for investment	$ 23,342,000	$ 26,520,000
Other financing liabilities	22,002,000	24,815,000
Variable Interest Entity, Primary Beneficiary
Other secured borrowings, net	242,101,000	242,101,000
Other liabilities, related to VIEs	$ 144,000	$ 0