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SECURITIES - Available-for-sale Securities With Unrealized Loss Positions (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value $ 26,269,000 $ 51,258,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses (82,000) (627,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 316,612,000 333,837,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (34,507,000) (47,179,000)
Available-for-sale securities with unrealized loss positions, fair value 342,881,000 385,095,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (34,589,000) (47,806,000)
Allowance for credit losses related to the available-for-sale portfolio 0 0
Debt Securities, Available-for-Sale, Payment Defaults 0 0
Allowance for credit losses 0 0
Obligations of the U.S. Treasury    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 0 0
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses 0 0
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 7,429,000 7,118,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (623,000) (949,000)
Available-for-sale securities with unrealized loss positions, fair value 7,429,000 7,118,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (623,000) (949,000)
Obligations of U.S. Government agencies    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 0 0
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses 0 0
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 8,670,000 9,025,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (766,000) (1,129,000)
Available-for-sale securities with unrealized loss positions, fair value 8,670,000 9,025,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (766,000) (1,129,000)
Bank holding company debt securities    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 0 0
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses 0 0
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 26,291,000 25,246,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (2,672,000) (3,712,000)
Available-for-sale securities with unrealized loss positions, fair value 26,291,000 25,246,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (2,672,000) (3,712,000)
Obligations Of States And Political Subdivisions Tax Exempt    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 554,000 6,581,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses (11,000) (58,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 86,573,000 91,316,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (8,658,000) (10,873,000)
Available-for-sale securities with unrealized loss positions, fair value 87,127,000 97,897,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (8,669,000) (10,931,000)
Obligations Of States And Political Subdivisions Taxable    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 0 0
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses 0 0
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 43,289,000 42,506,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (6,512,000) (8,641,000)
Available-for-sale securities with unrealized loss positions, fair value 43,289,000 42,506,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (6,512,000) (8,641,000)
Residential Passthrough Securities    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 6,631,000 22,777,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses (32,000) (375,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 59,944,000 69,282,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (6,255,000) (9,595,000)
Available-for-sale securities with unrealized loss positions, fair value 66,575,000 92,059,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (6,287,000) (9,970,000)
Residential Collateralized Mortgage Obligations    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 15,224,000 19,586,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses (28,000) (156,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 21,952,000 27,157,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (2,282,000) (3,349,000)
Available-for-sale securities with unrealized loss positions, fair value 37,176,000 46,743,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (2,310,000) (3,505,000)
Commercial Mortgage Backed Securities    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 861,000 2,314,000
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses (10,000) (38,000)
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 62,464,000 62,187,000
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses (6,739,000) (8,931,000)
Available-for-sale securities with unrealized loss positions, fair value 63,325,000 64,501,000
Available-for-sale securities, with unrealized loss positions, unrealized losses (6,749,000) $ (8,969,000)
Private label commercial mortgage-backed securities    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 0  
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses 0  
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 0  
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses 0  
Available-for-sale securities with unrealized loss positions, fair value 0  
Available-for-sale securities, with unrealized loss positions, unrealized losses 0  
Asset-backed securities, Collateralized loan obligations    
Available-for-sale Securities With Unrealized Loss Positions    
Available-for-sale securities with unrealized loss positions, less than 12 months, fair value 2,999,000  
Available-for-sale securities with unrealized loss positions, less than 12 months, unrealized losses (1,000)  
Available-for-sale securities with unrealized loss positions, 12 months or more, fair value 0  
Available-for-sale securities with unrealized loss positions, 12 months or more, unrealized losses 0  
Available-for-sale securities with unrealized loss positions, fair value 2,999,000  
Available-for-sale securities, with unrealized loss positions, unrealized losses $ (1,000)