Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Receivables, net at fair value	$ 50,890,000	$ 53,975,000
Servicing rights at fair value	880,950,000	0
Other assets at fair value	229,383,000	949,000
Payables and accrued liabilities at fair value	85,723,000	25,348,000
Mortgage-backed debt at fair value	721,080,000	757,286,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000,000	10,000,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	36,956,904	36,687,785
Common stock, shares outstanding	36,956,904	36,687,785
VIE [Member]
Mortgage-backed debt at fair value	$ 721,080,000	$ 757,286,000