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Securities, AFS Securities in Continuous Unrealized Loss Position (Details)
$ in Thousands
Dec. 31, 2024
USD ($)
Position
Dec. 31, 2023
USD ($)
Position
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 195,884 $ 2,765
12 months or longer 1,291,001 1,422,826
Total 1,486,885 1,425,591
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (2,515) (82)
12 months or longer (162,371) (184,185)
Total $ (164,886) $ (184,267)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 32 10
12 months or longer | Position 369 378
Total | Position 401 388
AIR on AFS debt securities $ 4,400 $ 3,900
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets
U.S. Treasury [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 0 $ 0
12 months or longer 92,737 125,024
Total 92,737 125,024
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months 0 0
12 months or longer (6,107) (8,278)
Total $ (6,107) $ (8,278)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 0 0
12 months or longer | Position 5 8
Total | Position 5 8
Federal Agency [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 0 $ 0
12 months or longer 218,517 214,740
Total 218,517 214,740
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months 0 0
12 months or longer (29,831) (33,644)
Total $ (29,831) $ (33,644)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 0 0
12 months or longer | Position 16 16
Total | Position 16 16
State & Municipal [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 759 $ 0
12 months or longer 86,731 85,528
Total 87,490 85,528
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (4) 0
12 months or longer (7,963) (9,956)
Total $ (7,967) $ (9,956)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 1 0
12 months or longer | Position 66 66
Total | Position 67 66
Mortgage-Backed [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 95,153 $ 53
12 months or longer 368,589 421,259
Total 463,742 421,312
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (1,374) (1)
12 months or longer (46,625) (51,565)
Total $ (47,999) $ (51,566)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 16 7
12 months or longer | Position 152 156
Total | Position 168 163
Collateralized Mortgage Obligations [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 98,494 $ 1,333
12 months or longer 480,891 536,678
Total 579,385 538,011
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (1,128) (6)
12 months or longer (68,386) (73,351)
Total $ (69,514) $ (73,357)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 14 2
12 months or longer | Position 116 118
Total | Position 130 120
Corporate [Member]    
Unrealized Loss Position, Fair Value [Abstract]    
Less than 12 months $ 1,478 $ 1,379
12 months or longer 43,536 39,597
Total 45,014 40,976
Unrealized Loss Position, Unrealized Losses [Abstract]    
Less than 12 months (9) (75)
12 months or longer (3,459) (7,391)
Total $ (3,468) $ (7,466)
Unrealized Loss Position, Number of Positions [Abstract]    
Less than 12 months | Position 1 1
12 months or longer | Position 14 14
Total | Position 15 15