SECURITIES (Securities Pledged) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Pledged Financial Instruments, Not Separately Reported, Securities [Abstract]
State and local governments public deposits, carrying value	$ 184,837
Interest rate swap counterparties, carrying value	28,729
Repurchase transaction accounts, carrying value	207,586
Other, carrying value	2,609
Total pledged securities, carrying value	423,761
State and local governments public deposits, amortized cost	184,134
Interest rate swap counterparties, amortized cost	27,846
Repurchase transaction accounts, amortized cost	200,195
Other, amortized cost	2,608
Total pledged securities, amortized cost	414,783
State and local governments public deposits, fair value	198,351
Interest rate swap counterparties, fair value	28,935
Repurchase transaction accounts, fair value	207,586
Other, fair value	2,686
Total pledged securities, fair value	$ 437,558