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Investment Securities - Summary of Available-for-sale Securities with Unrealized Loss (Details)
$ in Thousands
Mar. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value $ 308,921 $ 257,325
Less than 12 months, unrealized loss $ 5,432 $ 9,578
Less than 12 months, Number of securities | security 126 168
12 months or more, fair value $ 764,271 $ 768,333
12 months or more, unrealized loss $ 122,803 $ 137,832
12 months or more, Number of securities | security 456 444
Total fair value $ 1,073,192 $ 1,025,658
Total unrealized loss 128,235 147,410
U.S. Treasury and government agencies    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 12,281 10,003
Less than 12 months, unrealized loss $ 46 $ 174
Less than 12 months, Number of securities | security 8 11
12 months or more, fair value $ 2,062 $ 2,299
12 months or more, unrealized loss $ 15 $ 34
12 months or more, Number of securities | security 9 10
Total fair value $ 14,343 $ 12,302
Total unrealized loss 61 208
U.S. government sponsored agencies    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 141,400 130,518
Less than 12 months, unrealized loss $ 3,090 $ 5,816
Less than 12 months, Number of securities | security 23 27
12 months or more, fair value $ 71,663 $ 70,982
12 months or more, unrealized loss $ 7,671 $ 9,321
12 months or more, Number of securities | security 13 13
Total fair value $ 213,063 $ 201,500
Total unrealized loss 10,761 15,137
States and political subdivisions    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 30,058 28,400
Less than 12 months, unrealized loss $ 910 $ 1,188
Less than 12 months, Number of securities | security 35 55
12 months or more, fair value $ 165,447 $ 160,210
12 months or more, unrealized loss $ 26,949 $ 27,601
12 months or more, Number of securities | security 154 138
Total fair value $ 195,505 $ 188,610
Total unrealized loss 27,859 28,789
Residential mortgage-backed securities    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 116,813 85,043
Less than 12 months, unrealized loss $ 1,313 $ 2,300
Less than 12 months, Number of securities | security 54 69
12 months or more, fair value $ 477,184 $ 482,609
12 months or more, unrealized loss $ 80,237 $ 91,175
12 months or more, Number of securities | security 255 256
Total fair value $ 593,997 $ 567,652
Total unrealized loss 81,550 93,475
Commercial mortgage-backed securities    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 8,369 2,868
Less than 12 months, unrealized loss $ 73 $ 93
Less than 12 months, Number of securities | security 6 5
12 months or more, fair value $ 44,267 $ 46,619
12 months or more, unrealized loss $ 7,579 $ 9,316
12 months or more, Number of securities | security 23 24
Total fair value $ 52,636 $ 49,487
Total unrealized loss 7,652 9,409
Bank-issued trust preferred securities    
Available-for-sale securities that had an unrealized loss:    
Less than 12 months, fair value 0 493
Less than 12 months, unrealized loss $ 0 $ 7
Less than 12 months, Number of securities | security 0 1
12 months or more, fair value $ 3,648 $ 5,614
12 months or more, unrealized loss $ 352 $ 385
12 months or more, Number of securities | security 2 3
Total fair value $ 3,648 $ 6,107
Total unrealized loss $ 352 $ 392