Fair Values of Assets and Liabilities - Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Measurements Of Financial Instruments [Line Items]
Cash and due from banks	$ 124,254	$ 84,738
Interest-bearing deposits	29,990	310,634
Debt Securities, Available-for-Sale	762,661	1,041,380
Debt Securities, Held-to-maturity	461,162	541,311
Other investments	26,414	12,838
Loans	7,642,143	6,839,230
Deposits	8,005,469	7,982,498
Short-term borrowings	372,694	138,315	$ 117,373
Long-term debt	4,862	5,573
Subordinated Debentures outstanding, Amount	170,937	170,775
Capital lease obligation	5,425	5,921
Loans Held for Sale	11,869	18,583
Level 1 [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Debt Securities, Available-for-Sale	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	762,661
Other investments	25,244	11,668
Loans Held for Sale	11,869	18,583
Level 3 [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Debt Securities, Available-for-Sale	0
Loans Held for Sale	0	0
Carrying Amount [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Cash and due from banks	124,254	84,738
Interest-bearing deposits	29,990	310,634
Debt Securities, Available-for-Sale	762,661	1,041,380
Debt Securities, Held-to-maturity	461,162	541,311
Other investments	26,414	12,838
Loans held for sale	11,869	18,583
Loans	7,642,143	6,839,230
Deposits	8,005,469	7,982,498
Short-term borrowings	372,694	138,315
Long-term debt	4,862	5,573
Subordinated Debentures outstanding, Amount	170,937	170,775
Capital lease obligation	5,425	5,921
Estimated Fair Value [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Cash and due from banks	124,254	84,738
Interest-bearing deposits	29,990	310,634
Debt Securities, Available-for-Sale	762,661	1,041,380
Debt Securities, Held-to-maturity	386,205	536,651
Other investments	26,414	12,838
Loans held for sale	11,869	18,583
Loans	7,639,721	7,169,768
Deposits	7,992,012	7,980,101
Short-term borrowings	363,135	136,473
Long-term debt	4,781	6,065
Subordinated Debentures outstanding, Amount	156,621	175,040
Capital lease obligation	5,425	5,921
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Cash and due from banks	124,254	84,738
Interest-bearing deposits	29,990	310,634
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	762,661	1,041,380
Debt Securities, Held-to-maturity	386,205	536,651
Other investments	25,244	11,668
Loans held for sale	11,869	18,583
Loans	23,140	42,538
Deposits	7,992,012	7,980,101
Short-term borrowings	363,135	136,473
Long-term debt	4,781	6,065
Subordinated Debentures outstanding, Amount	0	0
Capital lease obligation	5,425	5,921
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	1,170	1,170
Loans held for sale	0	0
Loans	7,616,581	7,127,230
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated Debentures outstanding, Amount	156,621	175,040
Capital lease obligation	$ 0	$ 0