Loans and Allowance for Credit Losses - Summary of Financing Receivable, Past Due (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Days past due	$ 2,430,117
Nonaccrual		$ 76,049
Total Past Due & Nonaccrual		101,277
Gross loans	2,430,117	2,412,699
Deferred loan fees, net of costs	830	(1,640)
Total	2,430,947	2,411,059
Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	60,026
Real Estate [Member] | Nonaccrual loans with no allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	4,088
Real Estate [Member] | Non accrual loans with an allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	55,938
30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total	14,282	14,663
60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total	1,913	2,305
Greater than 90 Days Past Due & Accruing [Member]
Financing Receivable, Past Due [Line Items]
Total	3,037	8,260
Current Loans [Member]
Financing Receivable, Past Due [Line Items]
Nonaccrual	60,026
Financing Receivable Recorded Investments Current	2,351,689	2,251,034
Deferred loan fees, net of costs	830	(1,640)
PCI Loans [Member]
Financing Receivable, Past Due [Line Items]
PCI Loans		58,748
Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Days past due	506,558
Nonaccrual	39,429	68,039
Total Past Due & Nonaccrual		68,806
Gross loans	506,558	590,049
Commercial and Industrial [Member] | Nonaccrual loans with no allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	1,487
Commercial and Industrial [Member] | Non accrual loans with an allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	37,942
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days past due	2,235	488
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days past due	632	279
Commercial and Industrial [Member] | Greater than 90 Days Past Due & Accruing [Member]
Financing Receivable, Past Due [Line Items]
Days past due	1,709
Commercial and Industrial [Member] | Current Loans [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	462,553	519,762
Commercial and Industrial [Member] | PCI Loans [Member]
Financing Receivable, Past Due [Line Items]
PCI Loans		1,481
Paycheck Protection Program [Member]
Financing Receivable, Past Due [Line Items]
Days past due	2,386
Gross loans	2,386	11,967
Paycheck Protection Program [Member] | Current Loans [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	2,386	11,967
Construction, Commercial [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	180,052
Nonaccrual	383	714
Total Past Due & Nonaccrual		1,870
Gross loans	180,052	183,301
Construction, Commercial [Member] | Real Estate [Member] | Non accrual loans with an allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	383
Construction, Commercial [Member] | 30-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	2,016	1,137
Construction, Commercial [Member] | 60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due		19
Construction, Commercial [Member] | Current Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	177,653	181,431
Construction, Residential [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	75,832
Nonaccrual	0
Total Past Due & Nonaccrual		2,620
Gross loans	75,832	76,599
Construction, Residential [Member] | 30-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	523	1,416
Construction, Residential [Member] | 60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due		1,204
Construction, Residential [Member] | Current Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	75,309	73,972
Construction, Residential [Member] | PCI Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
PCI Loans		7
Mortgage, Commercial [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	870,540
Nonaccrual	11,880	1,658
Total Past Due & Nonaccrual		14,387
Gross loans	870,540	864,989
Mortgage, Commercial [Member] | Real Estate [Member] | Nonaccrual loans with no allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	2,024
Mortgage, Commercial [Member] | Real Estate [Member] | Non accrual loans with an allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	9,856
Mortgage, Commercial [Member] | 30-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	2,109	6,198
Mortgage, Commercial [Member] | 60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	714	297
Mortgage, Commercial [Member] | Greater than 90 Days Past Due & Accruing [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	574	6,234
Mortgage, Commercial [Member] | Current Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	855,263	799,379
Mortgage, Commercial [Member] | PCI Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
PCI Loans		51,223
Mortgage, Residential [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	730,110
Nonaccrual	7,580	5,143
Total Past Due & Nonaccrual		11,916
Gross loans	730,110	631,772
Mortgage, Residential [Member] | Real Estate [Member] | Nonaccrual loans with no allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	577
Mortgage, Residential [Member] | Real Estate [Member] | Non accrual loans with an allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	7,003
Mortgage, Residential [Member] | 30-59 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	5,101	4,544
Mortgage, Residential [Member] | 60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	288	231
Mortgage, Residential [Member] | Greater than 90 Days Past Due & Accruing [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due		1,998
Mortgage, Residential [Member] | Current Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	717,141	614,178
Mortgage, Residential [Member] | PCI Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
PCI Loans		5,678
Mortgage, Farmland [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due	5,470
Total Past Due & Nonaccrual		75
Gross loans	5,470	6,599
Mortgage, Farmland [Member] | 60-89 Days Past Due [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Days past due		75
Mortgage, Farmland [Member] | Current Loans [Member] | Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	5,470	6,524
Consumer [Member]
Financing Receivable, Past Due [Line Items]
Days past due	59,169
Nonaccrual	754	495
Total Past Due & Nonaccrual		1,603
Gross loans	59,169	47,423
Consumer [Member] | Non accrual loans with an allowance
Financing Receivable, Past Due [Line Items]
Nonaccrual	754
Consumer [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days past due	2,298	880
Consumer [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days past due	279	200
Consumer [Member] | Greater than 90 Days Past Due & Accruing [Member]
Financing Receivable, Past Due [Line Items]
Days past due	754	28
Consumer [Member] | Current Loans [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investments Current	$ 55,084	45,461
Consumer [Member] | PCI Loans [Member]
Financing Receivable, Past Due [Line Items]
PCI Loans		$ 359