SECURITIES (Securities Pledged) (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
Securities pledged for State and Local Government Public Deposits, Carrying Value	$ 203,479
Securities pledged for Interest Rate Swap Counterparties, Carrying Value	27,056
Securities pledged for Repurchase Agreements, Carrying Value	282,227
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities	2,569
Total pledged securities, Carrying Value	515,331
Securities pledged for State and Local Government public deposits, Amortized Cost	202,652
Securities pledged for Interest Rate Swap Counterparties, Amortized Cost	26,296
Securities pledged for Repurchase Agreements, Amortized Cost	286,539
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Amortized Cost	2,569
Total pledged securities, Amortized Cost	518,056
Securities pledged for State and Local Government Public Deposits, Fair Value	216,996
Securities pledged for Interest Rate Swap Counterparties, Fair Value	27,209
Securities pledged for Retail Repurchase Agreements, Fair Value	282,227
Pledged Financial Instruments, Not Separately Reported, Interest-bearing Deposits for Other Debt Facilities, Fair Value	2,625
Total pledged securities, Fair Value	$ 529,057