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Securities - Unrealized Loss on Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
AVAILABLE FOR SALE    
Less than 12 Months, fair value $ 312,649 $ 741,134
Less than 12 Months, unrealized loss 954 6,626
More than 12 Months, fair value 411,471 437,932
More than 12 Months, unrealized Loss 67,744 48,106
Total fair value 724,120 1,179,066
Total unrealized loss 68,698 54,732
HELD TO MATURITY    
Less than 12 months, fair value 175,999 78,032
Less than 12 months, unrealized loss 11,323 2,220
More than 12 months, fair value 889,552 916,604
More than 12 months, unrealized loss 180,816 167,561
Total fair value 1,065,551 994,636
Total unrealized loss 192,139 169,781
US Treasury Securities    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 134,379  
Less than 12 Months, unrealized loss 6  
More than 12 Months, fair value 0  
More than 12 Months, unrealized Loss 0  
Total fair value 134,379  
Total unrealized loss 6  
State and political subdivisions    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 4,458 12,089
Less than 12 Months, unrealized loss 152 64
More than 12 Months, fair value 373,075 398,304
More than 12 Months, unrealized Loss 64,291 43,653
Total fair value 377,533 410,393
Total unrealized loss 64,443 43,717
HELD TO MATURITY    
Less than 12 months, fair value 169,617 73,272
Less than 12 months, unrealized loss 11,037 1,779
More than 12 months, fair value 689,160 704,563
More than 12 months, unrealized loss 169,033 150,918
Total fair value 858,777 777,835
Total unrealized loss 180,070 152,697
Corporate bonds and other    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 2,944 2,967
Less than 12 Months, unrealized loss 56 33
More than 12 Months, fair value 5,640 5,612
More than 12 Months, unrealized Loss 342 368
Total fair value 8,584 8,579
Total unrealized loss 398 401
HELD TO MATURITY    
Less than 12 months, fair value 3,872 2,212
Less than 12 months, unrealized loss 71 149
More than 12 months, fair value 100,386 111,392
More than 12 months, unrealized loss 4,401 6,404
Total fair value 104,258 113,604
Total unrealized loss 4,472 6,553
Residential    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 170,868 723,855
Less than 12 Months, unrealized loss 740 6,517
More than 12 Months, fair value 30,203 31,527
More than 12 Months, unrealized Loss 2,693 3,571
Total fair value 201,071 755,382
Total unrealized loss 3,433 10,088
HELD TO MATURITY    
Less than 12 months, fair value 2,510 2,548
Less than 12 months, unrealized loss 215 292
More than 12 months, fair value 72,213 73,064
More than 12 months, unrealized loss 5,977 8,257
Total fair value 74,723 75,612
Total unrealized loss 6,192 8,549
Commercial    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 0 2,223
Less than 12 Months, unrealized loss 0 12
More than 12 Months, fair value 2,553 2,489
More than 12 Months, unrealized Loss 418 514
Total fair value 2,553 4,712
Total unrealized loss 418 526
HELD TO MATURITY    
Less than 12 months, fair value 0 0
Less than 12 months, unrealized loss 0 0
More than 12 months, fair value 27,793 27,585
More than 12 months, unrealized loss 1,405 1,982
Total fair value 27,793 27,585
Total unrealized loss $ 1,405 $ 1,982