SECURITIES (Securities Pledged) (Details) $ in Thousands	Sep. 30, 2018 USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
Securities pledged for State and Local Government Public Deposits, Carrying Value	$ 128,020
Securities pledged for Interest Rate Swap Counterparties, Carrying Value	13,782
Securities pledged for Repurchase Agreements, Carrying Value	128,991
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities	3,852
Total pledged securities, Carrying Value	274,645
Securities pledged for State and Local Government public deposits, Amortized Cost	128,101
Securities pledged for Interest Rate Swap Counterparties, Amortized Cost	14,023
Securities pledged for Repurchase Agreements, Amortized Cost	132,361
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Amortized Cost	3,852
Total pledged securities, Amortized Cost	278,337
Securities pledged for State and Local Government Public Deposits, Fair Value	127,902
Securities pledged for Interest Rate Swap Counterparties, Fair Value	13,494
Securities pledged for Retail Repurchase Agreements, Fair Value	128,991
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Fair Value	3,658
Total pledged securities, Fair Value	$ 274,045