Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
Fair Value, Quantitative Information about Level 3 Fair Value Measurements (Details) - Fair Value Hierarchy [Domain] - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Mar. 31, 2015
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Mortgage servicing rights $ 437,576 $ 452,006 $ 410,229 $ 500,490 $ 476,663 $ 514,402
Fair Value Measurements, Valuation Processes, Description Discounted cash flow          
Fair Value Inputs, Prepayment Rate 11.20% 11.90%        
Fair Value Inputs, Probability of Default 4.60% 5.60%        
Fair Value Inputs, Discount Rate 9.40% 9.50%        
Minimum [Member]            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Fair Value Inputs, Prepayment Rate 9.50%          
Fair Value Inputs, Probability of Default 4.30%          
Fair Value Inputs, Discount Rate 8.10%          
Maximum [Member]            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Fair Value Inputs, Prepayment Rate 12.80%          
Fair Value Inputs, Probability of Default 4.90%          
Fair Value Inputs, Discount Rate 10.70%