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Description of Business, Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Restatement Adjustment [Member]
Dec. 31, 2011
Restatement Adjustment [Member]
Noncontrolling Interest [Line Items]            
Loans held for sale, at fair value $ 503,753,000 $ 426,480,000 $ 0   $ 426,500,000  
Loans held for sale, at lower of cost or fair value 62,907,000 82,866,000 20,633,000 25,803,000 82,900,000  
Mortgage servicing rights 1,953,352,000 678,937,000     676,700,000  
Mortgage servicing rights fair value 116,029,000 85,213,000     85,200,000  
Financing liabilities         306,300,000  
Process management fees         $ 37,100,000 $ 34,200,000