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Securities, HTM Securities in Continuous Unrealized Loss Position (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Position
Dec. 31, 2024
USD ($)
Position
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 15,966 $ 16,605
12 months or longer 590,559 640,538
Total 606,525 657,143
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (265) (114)
12 months or longer (65,019) (92,904)
Total $ (65,284) $ (93,018)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 9 13
12 months or longer | Position 245 276
Total | Position 254 289
HTM Securities [Abstract]    
HTM debt securities, nonaccrual $ 0 $ 0
Accrued interest reversed against interest income 0 0
Collateral-dependent HTM debt securities 0 0
Allowance for credit losses on HTM securities 0 0
AIR on HTM debt securities $ 3,600 $ 4,400
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets
Past Due [Member]    
HTM Securities [Abstract]    
HTM debt securities $ 0 $ 0
Federal Agency [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months 0 0
12 months or longer 88,488 83,344
Total 88,488 83,344
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months 0 0
12 months or longer (11,512) (16,656)
Total $ (11,512) $ (16,656)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 0 0
12 months or longer | Position 4 4
Total | Position 4 4
Mortgage-Backed [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 10,756 $ 0
12 months or longer 171,725 189,271
Total 182,481 189,271
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (86) 0
12 months or longer (24,837) (34,865)
Total $ (24,923) $ (34,865)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 1 0
12 months or longer | Position 33 34
Total | Position 34 34
Collateralized Mortgage Obligations [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 0 $ 7,147
12 months or longer 177,303 198,978
Total 177,303 206,125
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months 0 (7)
12 months or longer (15,845) (22,792)
Total $ (15,845) $ (22,799)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 0 1
12 months or longer | Position 47 52
Total | Position 47 53
State & Municipal [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 5,210 $ 9,458
12 months or longer 153,043 168,945
Total 158,253 178,403
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (179) (107)
12 months or longer (12,825) (18,591)
Total $ (13,004) $ (18,698)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 8 12
12 months or longer | Position 161 186
Total | Position 169 198
US Government Agencies Debt Securities and US Government-sponsored Enterprises Debt Securities [Member]    
HTM Securities [Abstract]    
Held-to-maturity debt securities, percentage 66.00% 66.00%
Local Municipal Bonds [Member]    
HTM Securities [Abstract]    
HTM debt securities $ 79,200 $ 84,700