Quarterly report pursuant to Section 13 or 15(d)

Collateralized Borrowings in Securitization Trusts, at Fair Value (Details)

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Collateralized Borrowings in Securitization Trusts, at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Collateralized borrowings in securitization trusts, at fair value $ 2,941,990 $ 3,037,196
Debt, Weighted Average Interest Rate 3.40% 3.40%