Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($) Segment $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jan. 01, 2023 USD ($)
Significant Accounting Policies [Line Items]
Allowance for credit losses	$ 37,160,000	$ 28,511,000
Increase in allowance for credit losses	4,300,000
Unfunded loan commitments	3,400,000
Discount from loans to allowance for credit losses	1,700,000
Increase in deferred tax assets	1,600,000
Decrease to Retained Earnings	$ 183,788,000	156,492,000
Federal Home Loan Bank par value | $ / shares	$ 100
Reserve amount	$ 0
Number of operating segments | Segment	1
Loans, net of allowance for loan losses	$ 2,824,568,000	2,619,770,000
Total loans	13,158,000	9,253,000
Interest income	182,734,000	126,155,000	$ 105,054,000
Interest expense	57,238,000	15,951,000	9,629,000
Other assets	26,266,000	22,756,000
Subordinated debentures	103,943,000	103,799,000
Revisions
Significant Accounting Policies [Line Items]
Loans, net of allowance for loan losses	$ 2,528,906,000	2,160,920,000
Interest income		4,902,000
Interest expense			$ 3,312,000
Revisions | Loans and Secured Borrowings [Member]
Significant Accounting Policies [Line Items]
Total loans		101,615,000
Consumer Loan [Member]
Significant Accounting Policies [Line Items]
Period past due for accrued interest receivable	90 days
CECL adoption adjustments [Member]
Significant Accounting Policies [Line Items]
Decrease to Retained Earnings	$ (6,100,000)
ASU 2016-13 [Member]
Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Allowance for credit losses		897,000
Unfunded loan commitments				$ 3,386,000
ASU 2016-13 [Member] | CECL adoption adjustments [Member] | PCD Loans [Member]
Significant Accounting Policies [Line Items]
Allowance for credit losses				$ 1,668,000
ASU 2017-04 [Member]
Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
ASU 2022-02 [Member]
Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
ASU 2023-09 [Member]
Significant Accounting Policies [Line Items]
Minimum percentage of the amount computed by multiplying pretax income loss by the applicable statutory income tax rate	5.00%
Minimum percentage of total income taxes paid (net of refunds received)	5.00%
Cash and Cash Equivalents [Member] | Interest Rate Swap [Member]
Significant Accounting Policies [Line Items]
Cash pledged as collateral	$ 0	$ 0
Unsecured Debt [Member]
Significant Accounting Policies [Line Items]
Retail loans past due charge off period	90 days
Secured Debt [Member]
Significant Accounting Policies [Line Items]
Residential real estate loans past due assessment of value period	180 days
Other Debt [Member]
Significant Accounting Policies [Line Items]
Loans past due charged down to the net realizable value period	90 days
Maximum [Member]
Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%	1.00%	1.00%
Original maturities for cash and cash equivalents	90 days
Estimated useful life of intangible assets	12 years
Lease term	6 years
Maximum [Member] | Furniture and Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	7 years
Maximum [Member] | Buildings and Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	50 years
Maximum [Member] | WSP [Member]
Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%	1.00%	1.00%
Maximum [Member] | CIVB Risk Management, Inc. [Member]
Significant Accounting Policies [Line Items]
Percentage of insurance commission revenue of total revenue	1.00%	1.00%	1.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	5 years
Lease term	3 years
Minimum [Member] | Furniture and Equipment [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	3 years
Minimum [Member] | Buildings and Improvements [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of asset	7 years