Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	$ 130,675	$ 117,790	$ 121,622
Allowance for credit losses - loan commitments, beginning balance	8,604	8,368	7,775
Total beginning allowance for credit losses - loans and loan commitments	139,279	126,158	129,397
Provision for loan losses	21,734	17,527	(2,208)
Provision for loan commitments	(2,484)	236	593
Total provision for credit losses - loans and loan commitments	19,250	17,763	(1,615)
Charge-offs	(19,875)	(11,177)	(7,892)
Recoveries	6,232	6,535	6,268
Net recoveries (charge-offs)	(13,643)	(4,642)	(1,624)
Allowance for credit losses - loans, ending balance	138,766	130,675	117,790
Allowance for credit losses - loan commitments, ending balance	6,120	8,604	8,368
Total ending allowance for credit losses - loans and loan commitments	144,886	139,279	126,158
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	36,644	31,540	26,875
Allowance for credit losses - loan commitments, beginning balance	429		1,497
Total beginning allowance for credit losses - loans and loan commitments	37,073	31,540	28,372
Provision for loan losses	14,287	6,168	4,736
Provision for loan commitments	(429)	429	(1,497)
Total provision for credit losses - loans and loan commitments	13,858	6,597	3,239
Charge-offs	(10,533)	(2,283)	(1,068)
Recoveries	2,000	1,219	997
Net recoveries (charge-offs)	(8,533)	(1,064)	(71)
Allowance for credit losses - loans, ending balance	42,398	36,644	31,540
Allowance for credit losses - loan commitments, ending balance		429
Total ending allowance for credit losses - loans and loan commitments	42,398	37,073	31,540
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	1,366	1,285	2,220
Total beginning allowance for credit losses - loans and loan commitments	1,366	1,285	2,220
Provision for loan losses	1,814	1,420	333
Total provision for credit losses - loans and loan commitments	1,814	1,420	333
Charge-offs	(1,888)	(1,753)	(1,622)
Recoveries	421	414	354
Net recoveries (charge-offs)	(1,467)	(1,339)	(1,268)
Allowance for credit losses - loans, ending balance	1,713	1,366	1,285
Total ending allowance for credit losses - loans and loan commitments	1,713	1,366	1,285
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	7,123	6,737	7,310
Allowance for credit losses - loan commitments, beginning balance	6,894	6,025	4,180
Total beginning allowance for credit losses - loans and loan commitments	14,017	12,762	11,490
Provision for loan losses	1,815	321	(625)
Provision for loan commitments	(1,789)	869	1,845
Total provision for credit losses - loans and loan commitments	26	1,190	1,220
Charge-offs	(813)	(222)	(73)
Recoveries	286	287	125
Net recoveries (charge-offs)	(527)	65	52
Allowance for credit losses - loans, ending balance	8,411	7,123	6,737
Allowance for credit losses - loan commitments, ending balance	5,105	6,894	6,025
Total ending allowance for credit losses - loans and loan commitments	13,516	14,017	12,762
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	59,351	52,659	65,355
Allowance for credit losses - loan commitments, beginning balance			201
Total beginning allowance for credit losses - loans and loan commitments	59,351	52,659	65,556
Provision for loan losses	516	7,722	(12,939)
Provision for loan commitments			(201)
Total provision for credit losses - loans and loan commitments	516	7,722	(13,140)
Charge-offs	(937)	(1,877)	(795)
Recoveries	898	847	1,038
Net recoveries (charge-offs)	(39)	(1,030)	243
Allowance for credit losses - loans, ending balance	59,828	59,351	52,659
Total ending allowance for credit losses - loans and loan commitments	59,828	59,351	52,659
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	21,218	18,208	15,401
Allowance for credit losses - loan commitments, beginning balance	1,276	2,215	1,576
Total beginning allowance for credit losses - loans and loan commitments	22,494	20,423	16,977
Provision for loan losses	631	2,290	2,717
Provision for loan commitments	(261)	(939)	639
Total provision for credit losses - loans and loan commitments	370	1,351	3,356
Charge-offs	(308)	(392)	(500)
Recoveries	249	1,112	590
Net recoveries (charge-offs)	(59)	720	90
Allowance for credit losses - loans, ending balance	21,790	21,218	18,208
Allowance for credit losses - loan commitments, ending balance	1,015	1,276	2,215
Total ending allowance for credit losses - loans and loan commitments	22,805	22,494	20,423
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	3,956	3,127	3,737
Allowance for credit losses - loan commitments, beginning balance			272
Total beginning allowance for credit losses - loans and loan commitments	3,956	3,127	4,009
Provision for loan losses	2,141	2,507	44
Provision for loan commitments			(272)
Total provision for credit losses - loans and loan commitments	2,141	2,507	(228)
Charge-offs	(4,402)	(3,725)	(3,476)
Recoveries	1,696	2,047	2,822
Net recoveries (charge-offs)	(2,706)	(1,678)	(654)
Allowance for credit losses - loans, ending balance	3,391	3,956	3,127
Total ending allowance for credit losses - loans and loan commitments	3,391	3,956	3,127
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	1,017	4,234	724
Allowance for credit losses - loan commitments, beginning balance	5	128	49
Total beginning allowance for credit losses - loans and loan commitments	1,022	4,362	773
Provision for loan losses	530	(2,901)	3,526
Provision for loan commitments	(5)	(123)	79
Total provision for credit losses - loans and loan commitments	525	(3,024)	3,605
Charge-offs	(994)	(925)	(358)
Recoveries	682	609	342
Net recoveries (charge-offs)	(312)	(316)	(16)
Allowance for credit losses - loans, ending balance	1,235	1,017	4,234
Allowance for credit losses - loan commitments, ending balance		5	128
Total ending allowance for credit losses - loans and loan commitments	$ 1,235	$ 1,022	$ 4,362