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Commitments and Contingencies - Narrative (Details) (USD $)
 3 Months Ended 0 Months Ended 3 Months Ended 1 Months Ended
Mar. 31, 2014
Loan
Dec. 19, 2013
Unfavorable Regulatory Action [Member]
Mar. 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 Accrual   66,900,000      
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 87,900,000,000        
Warranty Repurchase Demands Unpaid Principal Balance $ 138,700,000        
Warranty Repurchase Demands Number Of Loans 701