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INVESTMENT SECURITIES (Schedule of Securities with Unrealized Losses) (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
item
Sep. 30, 2024
USD ($)
item
Dec. 31, 2023
USD ($)
item
Held-to-maturity Securities      
Total, Unrealized/Unrecognized Losses $ 0 $ 0  
Number of securities of one issuer | item 0 0 0
Impairment loss $ 0 $ 0  
Available-for-sale Securities.      
Available-for-sale Securities      
Less than 12 Months, Estimated Fair Value 0 0 $ 10,873,000
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 (198,000)
12 months or more, Estimated Fair Value 376,764,000 376,764,000 380,995,000
12 months or more, Unrealized/Unrecognized Losses (66,438,000) (66,438,000) (78,854,000)
Total, Estimated Fair Value 376,764,000 376,764,000 391,868,000
Total, Unrealized/Unrecognized Losses (66,438,000) (66,438,000) (79,052,000)
Held-to-maturity Securities      
Held-to-maturity Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 386,203,000 386,203,000 404,252,000
12 months or more, Unrealized/Unrecognized Losses (52,242,000) (52,242,000) (64,608,000)
Total, Estimated Fair Value 386,203,000 386,203,000 404,252,000
Total, Unrealized/Unrecognized Losses (52,242,000) (52,242,000) (64,608,000)
U.S. Government agency securities | Available-for-sale Securities.      
Available-for-sale Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 63,857,000 63,857,000 61,775,000
12 months or more, Unrealized/Unrecognized Losses (4,141,000) (4,141,000) (6,222,000)
Total, Estimated Fair Value 63,857,000 63,857,000 61,775,000
Total, Unrealized/Unrecognized Losses (4,141,000) (4,141,000) (6,222,000)
U.S. State and Municipal securities | Available-for-sale Securities.      
Available-for-sale Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 9,808,000 9,808,000 9,699,000
12 months or more, Unrealized/Unrecognized Losses (1,573,000) (1,573,000) (1,797,000)
Total, Estimated Fair Value 9,808,000 9,808,000 9,699,000
Total, Unrealized/Unrecognized Losses (1,573,000) (1,573,000) (1,797,000)
U.S. State and Municipal securities | Held-to-maturity Securities      
Held-to-maturity Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 13,848,000 13,848,000 13,995,000
12 months or more, Unrealized/Unrecognized Losses (1,535,000) (1,535,000) (1,574,000)
Total, Estimated Fair Value 13,848,000 13,848,000 13,995,000
Total, Unrealized/Unrecognized Losses (1,535,000) (1,535,000) (1,574,000)
Residential MBS | Available-for-sale Securities.      
Available-for-sale Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 276,164,000 276,164,000 292,970,000
12 months or more, Unrealized/Unrecognized Losses (58,673,000) (58,673,000) (68,609,000)
Total, Estimated Fair Value 276,164,000 276,164,000 292,970,000
Total, Unrealized/Unrecognized Losses (58,673,000) (58,673,000) (68,609,000)
Residential MBS | Held-to-maturity Securities      
Held-to-maturity Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 335,769,000 335,769,000 354,750,000
12 months or more, Unrealized/Unrecognized Losses (49,293,000) (49,293,000) (60,556,000)
Total, Estimated Fair Value 335,769,000 335,769,000 354,750,000
Total, Unrealized/Unrecognized Losses (49,293,000) (49,293,000) (60,556,000)
Commercial MBS | Available-for-sale Securities.      
Available-for-sale Securities      
Less than 12 Months, Estimated Fair Value 0 0 10,873,000
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 (198,000)
12 months or more, Estimated Fair Value 24,227,000 24,227,000 13,322,000
12 months or more, Unrealized/Unrecognized Losses (1,970,000) (1,970,000) (2,168,000)
Total, Estimated Fair Value 24,227,000 24,227,000 24,195,000
Total, Unrealized/Unrecognized Losses (1,970,000) (1,970,000) (2,366,000)
Commercial MBS | Held-to-maturity Securities      
Held-to-maturity Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 7,276,000 7,276,000 7,024,000
12 months or more, Unrealized/Unrecognized Losses (797,000) (797,000) (1,066,000)
Total, Estimated Fair Value 7,276,000 7,276,000 7,024,000
Total, Unrealized/Unrecognized Losses (797,000) (797,000) (1,066,000)
Asset-backed Securities | Available-for-sale Securities.      
Available-for-sale Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 2,708,000 2,708,000 3,229,000
12 months or more, Unrealized/Unrecognized Losses (81,000) (81,000) (58,000)
Total, Estimated Fair Value 2,708,000 2,708,000 3,229,000
Total, Unrealized/Unrecognized Losses (81,000) (81,000) (58,000)
US Treasury Securities | Held-to-maturity Securities      
Held-to-maturity Securities      
Less than 12 Months, Estimated Fair Value 0 0 0
Less than 12 Months, Unrealized/Unrecognized Losses 0 0 0
12 months or more, Estimated Fair Value 29,310,000 29,310,000 28,483,000
12 months or more, Unrealized/Unrecognized Losses (617,000) (617,000) (1,412,000)
Total, Estimated Fair Value 29,310,000 29,310,000 28,483,000
Total, Unrealized/Unrecognized Losses $ (617,000) $ (617,000) $ (1,412,000)