INVESTMENT SECURITIES - NUMBER OF INVESTMENTS IN AN UNREALIZED LOSS POSITION (Details) - investment_security	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	86	121
SBA-guaranteed securities
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	2	1
GSE obligations
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	0	1
Mortgage-backed securities issued by GSEs
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	40	83
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	21	9
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	16	15
Collateralized loan obligations
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	5	8
Non-agency RMBS
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	0	1
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Number of investments securities in an unrealized loss position	2	3