MORTGAGE BANKING - Economic Assumptions Used to Estimate Value of MSRs Capitalized (Details) (Residential Mortgages)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Residential Mortgages
Servicing Assets at Fair Value [Line Items]
Weighted average life (in years)	5 years 8 months 12 days	6 years 1 month 6 days
Weighted average constant prepayment rate (percent)	11.70%	12.60%
Weighted average discount rate (percent)	10.30%	10.50%