Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Cash and cash equivalents (1)	[1]	$ 348,018	$ 401,719
Restricted cash	[1]	203,258	242,570
Loans held for investment at fair value	[1]	2,133,829	2,932,325
Loans held for investment by the Company at fair value	[1]	12,198	361,230
Loans held for sale by the Company at fair value (1)	[1]	459,283	235,825
Accrued interest receivable	[1]	24,546	33,822
Other assets	[1]	113,896	156,278
Total assets of consolidated variable interest entities		3,589,968	4,640,831
Accrued interest payable	[1]	22,050	32,992
Accrued expenses and other liabilities	[1]	136,629	228,380
Notes, certificates and secured borrowings at fair value (1)	[1]	2,152,316	2,954,768
Payable to securitization note and residual certificate holders	[1]	0	312,123
Credit facilities and securities sold under repurchase agreements	[1]	305,336	32,100
Total liabilities of consolidated variable interest entities		2,721,876	3,713,074
Payable to securitization residual certificate holders		0	1,479
Securities available for sale, pledged as collateral at fair value		$ 24,748	$ 0
Common stock, par value ($ per share)		$ 0.01	$ 0.01
Common stock, shares authorized		900,000,000	900,000,000
Common stock, shares issued		428,434,596	419,756,546
Common stock, shares outstanding		426,151,896	417,473,846
Treasury stock, shares		2,282,700	2,282,700
Consolidated VIEs
Cash and cash equivalents (1)		$ 0	$ 0
Restricted cash		31,855	34,370
Loans held for investment at fair value		770,901	1,202,260
Loans held for investment by the Company at fair value		0	350,699
Loans held for sale by the Company at fair value (1)		307,828	60,812
Accrued interest receivable		9,596	15,602
Other assets		2,456	6,324
Total assets of consolidated variable interest entities		1,122,636	1,670,067
Accrued interest payable		8,804	14,789
Accrued expenses and other liabilities		1,214	52
Notes, certificates and secured borrowings at fair value (1)		776,403	1,210,349
Payable to securitization note and residual certificate holders		0	312,123
Credit facilities and securities sold under repurchase agreements		185,752	32,100
Total liabilities of consolidated variable interest entities		$ 972,173	$ 1,569,413

[1] Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.