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Investment Securities - Summary of Held-to-maturity Securities by Maturities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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Schedule of Held-to-maturity Securities [Line Items] |  |
Debt securities, maturing within 1 year, amortized cost | $ 11,990 |
Debt securities, maturing 1 to 5 years, amortized cost | 26,887 |
Debt securities, maturing 5 to 10 years, amortized cost | 121,537 |
Debt securities, maturing over 10 years, amortized cost | 519,330 |
Amortized Cost | 679,744 | $ 683,895
Debt securities, maturing within 1 year, fair value | 11,897 |
Debt securities, maturing 1 to 5 years, fair value | 25,553 |
Debt securities, maturing 5 to 10 years, fair value | 112,859 |
Debt securities, maturing over 10 years, fair value | 451,803 |
Debt securities, held-to-maturity, fair value | $ 602,112 | 612,022
Held-to-maturity securities, maturing within 1 year, weighted average yield | 3.85% |
Held-to-maturity securities, maturing 1 to 5 years, weighted average yield | 2.51% |
Held-to-maturity securities, maturing 6 to 10 years, weighted average yield | 4.00% |
Held-to-maturity securities, maturing over 10 years, weighted average yield | 3.51% |
Held-to-maturity securities, total weighted average yield | 3.57% |
U.S. government sponsored agencies |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt securities, maturing within 1 year, amortized cost | $ 10,500 |
Debt securities, maturing 1 to 5 years, amortized cost | 10,643 |
Debt securities, maturing 5 to 10 years, amortized cost | 67,056 |
Debt securities, maturing over 10 years, amortized cost | 100,224 |
Amortized Cost | 188,423 | 188,475
Debt securities, maturing within 1 year, fair value | 10,419 |
Debt securities, maturing 1 to 5 years, fair value | 10,144 |
Debt securities, maturing 5 to 10 years, fair value | 66,436 |
Debt securities, maturing over 10 years, fair value | 92,646 |
Debt securities, held-to-maturity, fair value | 179,645 | 180,825
States and political subdivisions |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt securities, maturing within 1 year, amortized cost | 0 |
Debt securities, maturing 1 to 5 years, amortized cost | 6,422 |
Debt securities, maturing 5 to 10 years, amortized cost | 11,419 |
Debt securities, maturing over 10 years, amortized cost | 126,474 |
Amortized Cost | 144,315 | 144,496
Debt securities, maturing within 1 year, fair value | 0 |
Debt securities, maturing 1 to 5 years, fair value | 6,249 |
Debt securities, maturing 5 to 10 years, fair value | 9,813 |
Debt securities, maturing over 10 years, fair value | 97,013 |
Debt securities, held-to-maturity, fair value | 113,075 | 114,288
Residential mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt securities, maturing within 1 year, amortized cost | 0 |
Debt securities, maturing 1 to 5 years, amortized cost | 451 |
Debt securities, maturing 5 to 10 years, amortized cost | 4,241 |
Debt securities, maturing over 10 years, amortized cost | 241,887 |
Amortized Cost | 246,579 | 248,559
Debt securities, maturing within 1 year, fair value | 0 |
Debt securities, maturing 1 to 5 years, fair value | 441 |
Debt securities, maturing 5 to 10 years, fair value | 3,696 |
Debt securities, maturing over 10 years, fair value | 221,484 |
Debt securities, held-to-maturity, fair value | 225,621 | 231,620
Commercial mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt securities, maturing within 1 year, amortized cost | 1,490 |
Debt securities, maturing 1 to 5 years, amortized cost | 9,371 |
Debt securities, maturing 5 to 10 years, amortized cost | 38,821 |
Debt securities, maturing over 10 years, amortized cost | 50,745 |
Amortized Cost | 100,427 | 102,365
Debt securities, maturing within 1 year, fair value | 1,478 |
Debt securities, maturing 1 to 5 years, fair value | 8,719 |
Debt securities, maturing 5 to 10 years, fair value | 32,914 |
Debt securities, maturing over 10 years, fair value | 40,660 |
Debt securities, held-to-maturity, fair value | $ 83,771 | $ 85,289

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