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Fair Values of Assets and Liabilities - Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Cash and due from banks | $ 125,436 | $ 124,254 |
Interest-bearing deposits | 21,557 | 29,990 |
Debt Securities, Available-for-Sale | 1,020,986 | 762,661 |
Debt Securities, Held-to-maturity | 419,009 | 461,162 |
Other investments | 50,871 | 26,414 |
Loans | 8,968,761 | 7,642,143 |
Deposits | 9,192,309 | 8,005,469 |
Short-term borrowings | 597,835 | 372,694 | $ 138,315
Long-term debt | 4,122 | 4,862 |
Subordinated Debentures outstanding, Amount | 177,741 | 170,937 |
Capital lease obligation | 4,894 | 5,425 |
Loans Held for Sale | 29,820 | 11,869 |
Level 1 [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Debt Securities, Available-for-Sale | 0 | 0 |
Other investments | 0 |  |
Loans Held for Sale | 0 | 0 |
Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Debt Securities, Available-for-Sale | 1,020,986 | 762,661 |
Other investments | 44,689 | 25,244 |
Loans Held for Sale | 29,820 | 11,869 |
Level 3 [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Debt Securities, Available-for-Sale | 0 | 0 |
Loans Held for Sale | 0 | 0 |
Carrying Amount [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Cash and due from banks | 125,436 | 124,254 |
Interest-bearing deposits | 21,557 | 29,990 |
Debt Securities, Available-for-Sale | 1,020,986 | 762,661 |
Debt Securities, Held-to-maturity | 419,009 | 461,162 |
Other investments | 50,871 | 26,414 |
Loans held for sale | 29,820 | 11,869 |
Loans | 8,968,761 | 7,642,143 |
Deposits | 9,192,309 | 8,005,469 |
Short-term borrowings | 597,835 | 372,694 |
Long-term debt | 4,122 | 4,862 |
Subordinated Debentures outstanding, Amount | 177,741 | 170,937 |
Capital lease obligation | 4,894 | 5,425 |
Estimated Fair Value [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Cash and due from banks | 125,436 | 124,254 |
Interest-bearing deposits | 21,557 | 29,990 |
Debt Securities, Available-for-Sale | 1,020,986 | 762,661 |
Debt Securities, Held-to-maturity | 350,595 | 386,205 |
Other investments | 50,871 | 26,414 |
Loans held for sale | 29,820 | 11,869 |
Loans | 8,860,736 | 7,639,721 |
Deposits | 9,187,655 | 7,992,012 |
Short-term borrowings | 594,670 | 363,135 |
Long-term debt | 4,041 | 4,781 |
Subordinated Debentures outstanding, Amount | 151,525 | 156,621 |
Capital lease obligation | 4,894 | 5,425 |
Estimated Fair Value [Member] | Level 1 [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Cash and due from banks | 125,436 | 124,254 |
Interest-bearing deposits | 21,557 | 29,990 |
Debt Securities, Available-for-Sale | 0 | 0 |
Debt Securities, Held-to-maturity | 0 | 0 |
Other investments | 0 | 0 |
Loans held for sale | 0 | 0 |
Loans | 0 | 0 |
Deposits | 0 | 0 |
Short-term borrowings | 0 | 0 |
Long-term debt | 0 | 0 |
Subordinated Debentures outstanding, Amount | 0 | 0 |
Capital lease obligation | 0 | 0 |
Estimated Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Cash and due from banks | 0 | 0 |
Interest-bearing deposits | 0 | 0 |
Debt Securities, Available-for-Sale | 1,020,986 | 762,661 |
Debt Securities, Held-to-maturity | 350,595 | 386,205 |
Other investments | 44,689 | 25,244 |
Loans held for sale | 29,820 | 11,869 |
Loans | 25,215 | 23,140 |
Deposits | 9,187,655 | 7,992,012 |
Short-term borrowings | 594,670 | 363,135 |
Long-term debt | 4,041 | 4,781 |
Subordinated Debentures outstanding, Amount | 0 | 0 |
Capital lease obligation | 4,894 | 5,425 |
Estimated Fair Value [Member] | Level 3 [Member] |  |  |
Fair Value Measurements Of Financial Instruments [Line Items] |  |  |
Cash and due from banks | 0 | 0 |
Interest-bearing deposits | 0 | 0 |
Debt Securities, Available-for-Sale | 0 | 0 |
Debt Securities, Held-to-maturity | 0 | 0 |
Other investments | 6,182 | 1,170 |
Loans held for sale | 0 | 0 |
Loans | 8,835,521 | 7,616,581 |
Deposits | 0 | 0 |
Short-term borrowings | 0 | 0 |
Long-term debt | 0 | 0 |
Subordinated Debentures outstanding, Amount | 151,525 | 156,621 |
Capital lease obligation | $ 0 | $ 0 |

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