INVESTMENT SECURITIES (Schedule of amortized cost and fair value of securities held-to-maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 501,525	$ 510,425
Total Securities	436,100	437,300
Held-to-maturity Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	501,525	510,425
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(65,394)	(73,135)
Total Securities	436,131	437,290
Held-to-maturity Securities | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	29,863	29,852
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(1,854)	(2,223)
Total Securities	28,009	27,629
Held-to-maturity Securities | U.S. State and Municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	15,753	15,814
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(2,096)	(2,609)
Total Securities	13,657	13,205
Held-to-maturity Securities | Residential MBS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	447,803	456,648
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(60,302)	(67,027)
Total Securities	387,501	389,621
Held-to-maturity Securities | Commercial MBS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8,106	8,111
Gross Unrealized/Unrecognized Gains		0
Gross Unrealized/Unrecognized Losses	(1,142)	(1,276)
Total Securities	$ 6,964	$ 6,835