Quarterly report pursuant to Section 13 or 15(d)

Mortgage Servicing Rights - Significant Economic Assumptions (Details)

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Mortgage Servicing Rights - Significant Economic Assumptions (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Fixed    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Weighted-average OAS 4.63% 4.52%
Weighted-average life, in years 4 years 4 months 13 days 4 years 6 months 10 days
Adjustable    
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]    
Weighted-average OAS 7.73% 7.61%
Weighted-average life, in years 3 years 2 months 8 days 2 years 11 months 12 days