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Investment Securities - Held-to-maturity Securities with Unrealized Loss (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
security
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value $ 122,785 $ 161,946
Less than 12 months, unrealized loss $ 3,306 $ 5,277
Less than 12 months, no. of securities | security 34 49
12 months or more, fair value $ 386,135 $ 265,877
12 months or more, unrealized loss $ 70,595 $ 76,962
12 months or more, no. of securities | security 150 120
Total fair value $ 508,920 $ 427,823
Total unrealized loss 73,901 82,239
U.S. government sponsored agencies    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 64,487 59,905
Less than 12 months, unrealized loss $ 356 $ 651
Less than 12 months, no. of securities | security 14 17
12 months or more, fair value $ 86,071 $ 29,306
12 months or more, unrealized loss $ 7,783 $ 8,825
12 months or more, no. of securities | security 18 9
Total fair value $ 150,558 $ 89,211
Total unrealized loss 8,139 9,476
States and political subdivisions    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 0 3,590
Less than 12 months, unrealized loss $ 0 $ 1,072
Less than 12 months, no. of securities | security 0 3
12 months or more, fair value $ 111,040 $ 101,863
12 months or more, unrealized loss $ 30,104 $ 35,336
12 months or more, no. of securities | security 67 64
Total fair value $ 111,040 $ 105,453
Total unrealized loss 30,104 36,408
Residential mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 44,379 71,582
Less than 12 months, unrealized loss $ 1,105 $ 2,904
Less than 12 months, no. of securities | security 14 21
12 months or more, fair value $ 117,654 $ 72,862
12 months or more, unrealized loss $ 17,477 $ 15,557
12 months or more, no. of securities | security 34 18
Total fair value $ 162,033 $ 144,444
Total unrealized loss 18,582 18,461
Commercial mortgage-backed securities    
Schedule of Held-to-maturity Securities [Line Items]    
Less than 12 months, fair value 13,919 26,869
Less than 12 months, unrealized loss $ 1,845 $ 650
Less than 12 months, no. of securities | security 6 8
12 months or more, fair value $ 71,370 $ 61,846
12 months or more, unrealized loss $ 15,231 $ 17,244
12 months or more, no. of securities | security 31 29
Total fair value $ 85,289 $ 88,715
Total unrealized loss $ 17,076 $ 17,894