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Advances - Schedule of Advances Paid on Behalf of Borrowers or on Foreclosed Properties (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Advances On Behalf of Borrowers [Line Items]        
Advances, gross $ 368,669 $ 486,199    
Allowance for losses (39,441) (41,901) $ (59,545) $ (70,034)
Advances, net 329,228 444,298    
Principal and Interest [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances, gross 59,868 81,681    
Taxes and Insurance [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances, gross 198,829 278,487    
Foreclosures, Bankruptcy and Other [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances, gross $ 109,972 $ 126,031