Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method (Details)

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio, MSRs Amortization Method (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Fair value, end of period $ 159,467   $ 159,467   $ 189,237
Residential Mortgage          
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Carrying value, beginning of period 127,275 $ 125,454 143,133 $ 132,813  
New servicing assets created 7,277 10,338 13,386 16,792  
Servicing assets acquired 0 0 0 0  
Impairment (charge) / recovery (7,295) 12,970 (23,635) 4,980  
Amortization and other (5,965) (5,635) (11,592) (11,458)  
Carrying value, end of period 121,292 143,127 121,292 143,127  
Fair value, end of period $ 121,464 $ 143,434 $ 121,464 $ 143,434  
Residential Mortgage | Amortization method          
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Weighted-average life (years) 6 years 1 month 6 years 6 months 6 years 1 month 6 years 6 months