INVESTMENT SECURITIES (Schedule of amortized cost and fair value of securities held-to-maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 515,613	$ 510,425
Total Securities	442,400	437,300
Held-to-maturity Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	515,613	510,425
Gross Unrealized/Unrecognized Gains	7	0
Gross Unrealized/Unrecognized Losses	(73,187)	(73,135)
Total Securities	442,433	437,290
Held-to-maturity Securities | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	54,738	29,852
Gross Unrealized/Unrecognized Gains	7	0
Gross Unrealized/Unrecognized Losses	(2,118)	(2,223)
Total Securities	52,627	27,629
Held-to-maturity Securities | U.S. State and Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	15,693	15,814
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(2,122)	(2,609)
Total Securities	13,571	13,205
Held-to-maturity Securities | Residential MBS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	437,082	456,648
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(67,577)	(67,027)
Total Securities	369,505	389,621
Held-to-maturity Securities | Commercial MBS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8,100	8,111
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(1,370)	(1,276)
Total Securities	$ 6,730	$ 6,835