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Securities - Unrealized Loss on Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
AVAILABLE FOR SALE    
Less than 12 Months, fair value $ 478,530 $ 185,339
Less than 12 Months, unrealized loss 1,831 1,165
More than 12 Months, fair value 506,655 560,939
More than 12 Months, unrealized Loss 48,186 38,666
Total fair value 985,185 746,278
Total unrealized loss 50,017 39,831
HELD TO MATURITY    
Less than 12 months, fair value 64,264 26,505
Less than 12 months, unrealized loss 982 1,258
More than 12 months, fair value 942,029 939,087
More than 12 months, unrealized loss 170,299 150,204
Total fair value 1,006,293 965,592
Total unrealized loss 171,281 151,462
State and political subdivisions    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 12,437 26,371
Less than 12 Months, unrealized loss 37 297
More than 12 Months, fair value 440,232 516,520
More than 12 Months, unrealized Loss 42,875 35,233
Total fair value 452,669 542,891
Total unrealized loss 42,912 35,530
HELD TO MATURITY    
Less than 12 months, fair value 60,377 16,549
Less than 12 months, unrealized loss 935 123
More than 12 months, fair value 707,838 713,499
More than 12 months, unrealized loss 145,815 126,110
Total fair value 768,215 730,048
Total unrealized loss 146,750 126,233
Corporate bonds and other    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 4,197 8,103
Less than 12 Months, unrealized loss 75 319
More than 12 Months, fair value 9,149 5,071
More than 12 Months, unrealized Loss 994 188
Total fair value 13,346 13,174
Total unrealized loss 1,069 507
HELD TO MATURITY    
Less than 12 months, fair value 3,887 9,956
Less than 12 months, unrealized loss 47 1,135
More than 12 months, fair value 127,392 114,787
More than 12 months, unrealized loss 13,405 14,603
Total fair value 131,279 124,743
Total unrealized loss 13,452 15,738
Residential    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 461,896 150,865
Less than 12 Months, unrealized loss 1,719 549
More than 12 Months, fair value 54,807 36,864
More than 12 Months, unrealized Loss 3,782 2,709
Total fair value 516,703 187,729
Total unrealized loss 5,501 3,258
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 79,109 82,747
More than 12 months, unrealized loss 8,841 7,263
Total fair value 79,109 82,747
Total unrealized loss 8,841 7,263
Commercial    
AVAILABLE FOR SALE    
Less than 12 Months, fair value 0 0
Less than 12 Months, unrealized loss 0 0
More than 12 Months, fair value 2,467 2,484
More than 12 Months, unrealized Loss 535 536
Total fair value 2,467 2,484
Total unrealized loss 535 536
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 27,690 28,054
More than 12 months, unrealized loss 2,238 2,228
Total fair value 27,690 28,054
Total unrealized loss $ 2,238 $ 2,228