Subsequent Events (Details) - Jun. 30, 2015 - USD ($) $ in Thousands	Total
Subsequent Event [Line Items]
Number of RMBS Sold	17
Cash Received From Delaware Trust	$ 146,000
Securities Issued by Delaware Trust	146,000
Par Value of Securities Placed in Trust	397,352
Fair Value of Securities Placed in Trust	$ 403,205
London Interbank Offered Rate (LIBOR) [Member]
Subsequent Event [Line Items]
Interest Rate on Securities Issued by Delaware Trust	2.80%