MORTGAGE BANKING - Economic Assumptions Used to Estimate Value of MSRs Capitalized (Details) - Residential mortgages	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Servicing Assets at Fair Value [Line Items]
Weighted average life (in years)	5 years 10 months 24 days	6 years 3 months 18 days	6 years	5 years 4 months 24 days
Weighted average constant prepayment rate	11.30%	9.80%	11.10%	11.10%
Weighted average discount rate	9.70%	9.70%	9.70%	9.60%