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Commitments and Contingencies - Narrative (Details) (USD $)
 6 Months Ended 0 Months Ended 1 Months Ended
Jun. 30, 2014
Loan
Dec. 19, 2013
Unfavorable Regulatory Action [Member]
May 31, 2014
Unfavorable Regulatory Action [Member]
Dec. 19, 2013
Unfavorable Regulatory Action [Member]
Minimum [Member]
Feb. 28, 2014
Wells Fargo [Member]
Loan
Loss Contingencies [Line Items]          
Mortgage loans on real estate, number of acquired loans on hold         184,000
Acquisitions         $ 39,000,000,000
Loss contingency, oversight monitor period   3 years      
Loss contingency, consumer relief fund   127,300,000      
Loss Contingency, Consumer Relief Fund, Former Owner Responsibility, Amount     60,400,000    
Loss Contingency, Consumer Relief Fund, Former Owner Responsibility, Amount Received     49,000,000    
Loss contingency, principal forgiveness modification program, aggregate amount       2,000,000,000  
Loss contingency, principal forgiveness modification program, term   3 years      
Provided or assumed representation and warranty obligations of unpaid principal balance 86,200,000,000        
Warranty repurchase demands unpaid principal balance $ 124,900,000        
Warranty repurchase demands number of loans 668