SECURITIES (Securities Pledged) (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
Securities pledged for State and Local Government Public Deposits, Carrying Value	$ 155,588
Securities pledged for Interest Rate Swap Counterparties, Carrying Value	28,049
Securities pledged for Repurchase Agreements, Carrying Value	153,285
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities	2,665
Total pledged securities, Carrying Value	339,587
Securities pledged for State and Local Government public deposits, Amortized Cost	154,453
Securities pledged for Interest Rate Swap Counterparties, Amortized Cost	26,923
Securities pledged for Repurchase Agreements, Amortized Cost	147,608
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Amortized Cost	2,665
Total pledged securities, Amortized Cost	331,649
Securities pledged for State and Local Government Public Deposits, Fair Value	160,654
Securities pledged for Interest Rate Swap Counterparties, Fair Value	28,432
Securities pledged for Retail Repurchase Agreements, Fair Value	153,286
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Fair Value	2,733
Total pledged securities, Fair Value	$ 345,105