Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Mortgage servicing rights $ 446,170 $ 493,688 $ 410,229 $ 452,006
Fair Value Measurements, Valuation Processes, Description Discounted cash flow      
Fair Value Inputs, Prepayment Rate 15.60% 11.80%    
Fair Value Inputs, Probability of Default 3.30% 4.00%    
Fair Value Inputs, Discount Rate 9.00% 10.10%    
Minimum [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value Inputs, Prepayment Rate 12.20%      
Fair Value Inputs, Probability of Default 3.10%      
Fair Value Inputs, Discount Rate 8.10%      
Maximum [Member]        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Fair Value Inputs, Prepayment Rate 18.30%      
Fair Value Inputs, Probability of Default 3.50%      
Fair Value Inputs, Discount Rate 9.80%