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Advances - Schedule of Advance Payments by Financial Institution on Foreclosed Properties (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Advances On Behalf of Borrowers [Line Items]        
Advances $ 486,199 $ 963,948    
Allowance for losses (41,901) (70,034)    
Advances, net 444,298 893,914 $ 890,832 $ 184,463
Servicing [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances 482,199 959,482    
Servicing [Member] | Principal And Interest [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances 81,654 128,217    
Servicing [Member] | Taxes And Insurance [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances 275,528 467,891    
Servicing [Member] | Foreclosures Bankruptcy And Other [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances 125,017 363,374    
Corporate Items and Other [Member]        
Advances On Behalf of Borrowers [Line Items]        
Advances $ 4,000 $ 4,466