Quarterly report pursuant to Section 13 or 15(d)

Mortgage Loans Held-for-Investment in Securitization Trust, at Fair Value Mortgage Loans Held-for-Investment in Securitization Trust, at Fair Value (Details)

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Mortgage Loans Held-for-Investment in Securitization Trust, at Fair Value Mortgage Loans Held-for-Investment in Securitization Trust, at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Mortgage Loans Held-for-Invesment, Unpaid Principal $ 421,485 $ 0
Mortgage Loans Held-for-Investment, Fair Value Adjustment 12,583 0
Mortgage loans held-for-investment in securitization trust, at fair value $ 434,068 $ 0