SECURITIES (Securities Pledged) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
State and local governments public deposits, carrying value	$ 203,510
Interest rate swap counterparties, carrying value	24,393
Repurchase transaction accounts, carrying value	114,949
Other, carrying value	1,778
Total pledged securities, carrying value	344,630
State and local governments public deposits, amortized cost	203,474
Interest rate swap counterparties, amortized cost	24,447
Repurchase transaction accounts, amortized cost	115,650
Other, amortized cost	1,782
Total pledged securities, amortized cost	345,353
State and local governments public deposits, fair value	207,013
Interest rate swap counterparties, fair value	24,287
Repurchase transaction accounts, fair value	114,864
Other, fair value	1,778
Total pledged securities, fair value	$ 347,942