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Match Funded Advances - Schedule of Match Funded Advances on Residential Loans (Details) - Residential Mortgage [Member] - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Match Funded Advances [Line Items]        
Principal and interest $ 711,272 $ 948,376    
Taxes and insurance 530,946 608,404    
Foreclosures, bankruptcy, real estate and other 209,746 149,988    
Match funded advances $ 1,451,964 $ 1,706,768 $ 2,409,442 $ 2,552,383