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Other Liabilities - Schedule of Other Liabilities (Footnote) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2013
Sep. 30, 2015
Business Acquisition [Line Items]    
Professional services expense $ 53.5  
Deferred credits prior to closing of related sale of MSRs and advances   $ 80.0
Homeward [Member]    
Business Acquisition [Line Items]    
Adjustment to initial purchase price allocation $ 13.4