MORTGAGE BANKING - Economic Assumptions Used to Estimate Value of MSRs Capitalized (Details) - Residential mortgages	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Servicing Assets at Fair Value [Line Items]
Weighted average life (in years)	5 years 4 months 24 days	5 years 4 months 24 days
Weighted average constant prepayment rate (percent)	11.10%	12.10%
Weighted average discount rate (percent)	9.60%	10.30%