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Investment Securities - Schedule of Fair Value and Unrealized Loss on Debt Security Investments in a Continuous Unrealized Loss Position (Details) | Sep. 30, 2023 USD ($) security | Dec. 31, 2022 USD ($) security
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Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 1 | 106
Available-for-sale securities, Less than 12 Months: Fair Value | $ 1,455,000 | $ 194,377,000
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 122,000 | $ 16,314,000
Available-for-sale securities, 12 Months or More: Number of Securities | security | 137 | 30
Available-for-sale securities, 12 Months or More: Fair Value | $ 216,609,000 | $ 40,250,000
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 31,550,000 | $ 8,150,000
Available-for-sale securities, Total: Number of Securities | security | 138 | 136
Available-for-sale securities, Total: Fair Value | $ 218,064,000 | $ 234,627,000
Available-for-sale securities, Total: Unrealized Losses | $ 31,672,000 | $ 24,464,000
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 11 | 283
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 8,166,000 | $ 178,268,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 1,382,000 | $ 18,894,000
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 412 | 138
Held-to-maturity securities, 12 Months or More: Fair Value | $ 332,840,000 | $ 165,857,000
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 59,173,000 | $ 32,095,000
Held-to-maturity securities, Total: Number of Securities | security | 423 | 421
Held-to-maturity securities, Total: Fair Value | $ 341,006,000 | $ 344,125,000
Held-to-maturity securities, Total: Unrealized Losses | $ 60,555,000 | $ 50,989,000
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 12 | 389
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value | $ 9,621,000 | $ 372,645,000
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 1,504,000 | $ 35,208,000
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security | 549 | 168
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Fair Value | $ 549,449,000 | $ 206,107,000
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 90,723,000 | $ 40,245,000
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security | 561 | 557
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value | $ 559,070,000 | $ 578,752,000
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses | $ 92,227,000 | $ 75,453,000
U.S. Treasury and U.S. government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 0 | 19
Available-for-sale securities, Less than 12 Months: Fair Value | $ 0 | $ 34,914,000
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 0 | $ 1,614,000
Available-for-sale securities, 12 Months or More: Number of Securities | security | 19 | 0
Available-for-sale securities, 12 Months or More: Fair Value | $ 34,731,000 | $ 0
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 1,878,000 | $ 0
Available-for-sale securities, Total: Number of Securities | security | 19 | 19
Available-for-sale securities, Total: Fair Value | $ 34,731,000 | $ 34,914,000
Available-for-sale securities, Total: Unrealized Losses | $ 1,878,000 | $ 1,614,000
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 4 | 54
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 5,627,000 | $ 84,946,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 858,000 | $ 10,093,000
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 141 | 91
Held-to-maturity securities, 12 Months or More: Fair Value | $ 199,781,000 | $ 125,891,000
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 39,505,000 | $ 24,741,000
Held-to-maturity securities, Total: Number of Securities | security | 145 | 145
Held-to-maturity securities, Total: Fair Value | $ 205,408,000 | $ 210,837,000
Held-to-maturity securities, Total: Unrealized Losses | $ 40,363,000 | $ 34,834,000
Mortgage-backed U.S. government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 1 | 69
Available-for-sale securities, Less than 12 Months: Fair Value | $ 1,455,000 | $ 131,879,000
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 122,000 | $ 11,876,000
Available-for-sale securities, 12 Months or More: Number of Securities | security | 92 | 24
Available-for-sale securities, 12 Months or More: Fair Value | $ 147,189,000 | $ 35,036,000
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 24,294,000 | $ 7,202,000
Available-for-sale securities, Total: Number of Securities | security | 93 | 93
Available-for-sale securities, Total: Fair Value | $ 148,644,000 | $ 166,915,000
Available-for-sale securities, Total: Unrealized Losses | $ 24,416,000 | $ 19,078,000
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 2 | 40
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 971,000 | $ 13,866,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 61,000 | $ 1,071,000
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 62 | 24
Held-to-maturity securities, 12 Months or More: Fair Value | $ 36,789,000 | $ 30,168,000
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 7,553,000 | $ 5,605,000
Held-to-maturity securities, Total: Number of Securities | security | 64 | 64
Held-to-maturity securities, Total: Fair Value | $ 37,760,000 | $ 44,034,000
Held-to-maturity securities, Total: Unrealized Losses | $ 7,614,000 | $ 6,676,000
State and political subdivision obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 0 | 6
Available-for-sale securities, Less than 12 Months: Fair Value | $ 0 | $ 2,521,000
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 0 | $ 671,000
Available-for-sale securities, 12 Months or More: Number of Securities | security | 8 | 2
Available-for-sale securities, 12 Months or More: Fair Value | $ 3,312,000 | $ 1,018,000
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 1,026,000 | $ 144,000
Available-for-sale securities, Total: Number of Securities | security | 8 | 8
Available-for-sale securities, Total: Fair Value | $ 3,312,000 | $ 3,539,000
Available-for-sale securities, Total: Unrealized Losses | $ 1,026,000 | $ 815,000
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 5 | 185
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 1,568,000 | $ 73,735,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 463,000 | $ 7,413,000
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 194 | 18
Held-to-maturity securities, 12 Months or More: Fair Value | $ 72,044,000 | $ 4,616,000
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 10,867,000 | $ 932,000
Held-to-maturity securities, Total: Number of Securities | security | 199 | 203
Held-to-maturity securities, Total: Fair Value | $ 73,612,000 | $ 78,351,000
Held-to-maturity securities, Total: Unrealized Losses | $ 11,330,000 | $ 8,345,000
Corporate debt securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale securities, Less than 12 Months: Number of Securities | security | 0 | 12
Available-for-sale securities, Less than 12 Months: Fair Value | $ 0 | $ 25,063,000
Available-for-sale securities, Less than 12 Months: Unrealized Losses | $ 0 | $ 2,153,000
Available-for-sale securities, 12 Months or More: Number of Securities | security | 18 | 4
Available-for-sale securities, 12 Months or More: Fair Value | $ 31,377,000 | $ 4,196,000
Available-for-sale securities, 12 Months or More: Unrealized Losses | $ 4,352,000 | $ 804,000
Available-for-sale securities, Total: Number of Securities | security | 18 | 16
Available-for-sale securities, Total: Fair Value | $ 31,377,000 | $ 29,259,000
Available-for-sale securities, Total: Unrealized Losses | $ 4,352,000 | $ 2,957,000
Schedule of Held-to-Maturity Securities [Line Items] |  |
Held-to-maturity securities, Less than 12 Months: Number of Securities | security | 0 | 4
Held-to-maturity securities, Less than 12 Months: Fair Value | $ 0 | $ 5,721,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses | $ 0 | $ 317,000
Held-to-maturity securities, 12 Months or More: Number of Securities | security | 15 | 5
Held-to-maturity securities, 12 Months or More: Fair Value | $ 24,226,000 | $ 5,182,000
Held-to-maturity securities, 12 Months or More: Unrealized Losses | $ 1,248,000 | $ 817,000
Held-to-maturity securities, Total: Number of Securities | security | 15 | 9
Held-to-maturity securities, Total: Fair Value | $ 24,226,000 | $ 10,903,000
Held-to-maturity securities, Total: Unrealized Losses | $ 1,248,000 | $ 1,134,000

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