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Match Funded Advances - Schedule of Match Funded Advances on Residential Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Dec. 31, 2014
Match Funded Advances [Line Items]        
Match funded advances $ 1,534,322 $ 1,706,768    
Residential Mortgage [Member]        
Match Funded Advances [Line Items]        
Principal and interest 783,797 948,376    
Taxes and insurance 540,277 608,404    
Foreclosures, bankruptcy, real estate and other 210,248 149,988    
Match funded advances $ 1,534,322 $ 1,706,768 $ 1,955,618 $ 2,409,442