Quarterly report pursuant to Section 13 or 15(d)

LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio (Details)

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LOAN SALES AND SECURITIZATIONS - Residential Mortgage Portfolio (Details) - Residential Mortgage - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Servicing Asset at Amortized Cost [Line Items]        
Loans sold with servicing retained $ 798,399 $ 715,589 $ 1,645,752 $ 1,348,055
Pretax gains resulting from above loan sales $ 16,943 $ 18,618 $ 39,133 $ 32,731