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INVESTMENT SECURITIES (Schedule of Securities with Unrealized Losses) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
item
Dec. 31, 2022
USD ($)
item
Held-to-maturity Securities    
Number of securities of one issuer | item 0 0
Impairment loss $ 0 $ 0
Available-for-sale Securities.    
Available-for-sale Securities    
Less than 12 Months, Estimated Fair Value 10,873 35,528
Less than 12 Months, Unrealized/Unrecognized Losses (198) (2,379)
12 months or more, Estimated Fair Value 380,995 387,125
12 months or more, Unrealized/Unrecognized Losses (78,854) (86,828)
Total, Estimated Fair Value 391,868 422,653
Total, Unrealized/Unrecognized Losses (79,052) (89,207)
Held-to-maturity Securities    
Held-to-maturity Securities    
Less than 12 Months, Estimated Fair Value   194,848
Less than 12 Months, Unrealized/Unrecognized Losses   (23,599)
12 months or more, Estimated Fair Value 404,252 242,442
12 months or more, Unrealized/Unrecognized Losses (64,608) (49,536)
Total, Estimated Fair Value 404,252 437,290
Total, Unrealized Losses (64,608) (73,135)
U.S. Government agency securities | Available-for-sale Securities.    
Available-for-sale Securities    
12 months or more, Estimated Fair Value 61,775 59,372
12 months or more, Unrealized/Unrecognized Losses (6,222) (8,624)
Total, Estimated Fair Value 61,775 59,372
Total, Unrealized/Unrecognized Losses (6,222) (8,624)
U.S. State and Municipal securities | Available-for-sale Securities.    
Available-for-sale Securities    
Less than 12 Months, Estimated Fair Value   2,546
Less than 12 Months, Unrealized/Unrecognized Losses   (527)
12 months or more, Estimated Fair Value 9,699 6,666
12 months or more, Unrealized/Unrecognized Losses (1,797) (1,910)
Total, Estimated Fair Value 9,699 9,212
Total, Unrealized/Unrecognized Losses (1,797) (2,437)
U.S. State and Municipal securities | Held-to-maturity Securities    
Held-to-maturity Securities    
Less than 12 Months, Estimated Fair Value   13,205
Less than 12 Months, Unrealized/Unrecognized Losses   (2,609)
12 months or more, Estimated Fair Value 13,995  
12 months or more, Unrealized/Unrecognized Losses (1,574)  
Total, Estimated Fair Value 13,995 13,205
Total, Unrealized Losses (1,574) (2,609)
Residential MBS | Available-for-sale Securities.    
Available-for-sale Securities    
Less than 12 Months, Estimated Fair Value   19,576
Less than 12 Months, Unrealized/Unrecognized Losses   (1,654)
12 months or more, Estimated Fair Value 292,970 305,936
12 months or more, Unrealized/Unrecognized Losses (68,609) (74,075)
Total, Estimated Fair Value 292,970 325,512
Total, Unrealized/Unrecognized Losses (68,609) (75,729)
Residential MBS | Held-to-maturity Securities    
Held-to-maturity Securities    
Less than 12 Months, Estimated Fair Value   162,960
Less than 12 Months, Unrealized/Unrecognized Losses   (19,625)
12 months or more, Estimated Fair Value 354,750 226,661
12 months or more, Unrealized/Unrecognized Losses (60,556) (47,402)
Total, Estimated Fair Value 354,750 389,621
Total, Unrealized Losses (60,556) (67,027)
Commercial MBS | Available-for-sale Securities.    
Available-for-sale Securities    
Less than 12 Months, Estimated Fair Value 10,873 13,406
Less than 12 Months, Unrealized/Unrecognized Losses (198) (198)
12 months or more, Estimated Fair Value 13,322 11,386
12 months or more, Unrealized/Unrecognized Losses (2,168) (2,031)
Total, Estimated Fair Value 24,195 24,792
Total, Unrealized/Unrecognized Losses (2,366) (2,229)
Commercial MBS | Held-to-maturity Securities    
Held-to-maturity Securities    
12 months or more, Estimated Fair Value 7,024 6,835
12 months or more, Unrealized/Unrecognized Losses (1,066) (1,276)
Total, Estimated Fair Value 7,024 6,835
Total, Unrealized Losses (1,066) (1,276)
Asset-backed Securities | Available-for-sale Securities.    
Available-for-sale Securities    
12 months or more, Estimated Fair Value 3,229 3,765
12 months or more, Unrealized/Unrecognized Losses (58) (188)
Total, Estimated Fair Value 3,229 3,765
Total, Unrealized/Unrecognized Losses (58) (188)
US Treasury Securities | Held-to-maturity Securities    
Held-to-maturity Securities    
Less than 12 Months, Estimated Fair Value   18,683
Less than 12 Months, Unrealized/Unrecognized Losses   (1,365)
12 months or more, Estimated Fair Value 28,483 8,946
12 months or more, Unrealized/Unrecognized Losses (1,412) (858)
Total, Estimated Fair Value 28,483 27,629
Total, Unrealized Losses $ (1,412) $ (2,223)