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Investment Securities - Bond Ratings (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 1,277,209 | $ 1,283,987
Aaa/AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 279,064 | 278,842
Aa/AA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 845,876 | 845,418
A |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 23,208 | 27,667
Not rated |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 4,892 | 1,782
Agency Backed |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 124,169 | 130,278
State and Political Subdivisions |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 1,109,480 | 1,110,424
State and Political Subdivisions | Aaa/AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 235,504 | 235,557
State and Political Subdivisions | Aa/AA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 845,876 | 845,418
State and Political Subdivisions | A |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 23,208 | 27,667
State and Political Subdivisions | Not rated |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 4,892 | 1,782
State and Political Subdivisions | Agency Backed |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 43,560 | 43,285
U.S. government-sponsored enterprises | Aaa/AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 43,560 | 43,285
U.S. government-sponsored enterprises | Aa/AA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored enterprises | A |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored enterprises | Not rated |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored enterprises | Agency Backed |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 124,169 | 130,278
U.S. government-sponsored mortgage-backed securities | Aaa/AAA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored mortgage-backed securities | Aa/AA |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored mortgage-backed securities | A |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored mortgage-backed securities | Not rated |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 0 | 0
U.S. government-sponsored mortgage-backed securities | Agency Backed |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 124,169 | $ 130,278

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