SECURITIES (Securities Pledged) (Details) $ in Thousands	Mar. 31, 2016 USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
Securities pledged for State and Local Government Public Deposits, Carrying Value	$ 183,462
Securities pledged for Interest Rate Swap Counterparties, Carrying Value	29,303
Securities pledged for Repurchase Agreements, Carrying Value	122,566
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities	1,865
Total pledged securities, Carrying Value	337,196
Securities pledged for State and Local Government public deposits, Amortized Cost	182,730
Securities pledged for Interest Rate Swap Counterparties, Amortized Cost	28,980
Securities pledged for Repurchase Agreements, Amortized Cost	121,595
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Amortized Cost	1,786
Total pledged securities, Amortized Cost	335,091
Securities pledged for State and Local Government Public Deposits, Fair Value	191,364
Securities pledged for Interest Rate Swap Counterparties, Fair Value	29,736
Securities pledged for Retail Repurchase Agreements, Fair Value	123,018
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Fair Value	1,865
Total pledged securities, Fair Value	$ 345,983