Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details)

v3.3.0.814
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Jun. 30, 2015
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Mortgage servicing rights $ 447,345 $ 452,006 $ 437,576 $ 498,466 $ 500,490 $ 514,402
Fair Value Measurements, Valuation Processes, Description Discounted cash flow          
Fair Value Inputs, Prepayment Rate 13.00% 11.90%        
Fair Value Inputs, Probability of Default 3.70% 5.60%        
Fair Value Inputs, Discount Rate 10.30% 9.50%        
Minimum [Member]            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Fair Value Inputs, Prepayment Rate 10.40%          
Fair Value Inputs, Probability of Default 3.40%          
Fair Value Inputs, Discount Rate 8.90%          
Maximum [Member]            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Fair Value Inputs, Prepayment Rate 14.90%          
Fair Value Inputs, Probability of Default 3.90%          
Fair Value Inputs, Discount Rate 11.40%