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Loans and ACL - Additional Information (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) Loan	Dec. 31, 2022 USD ($) Loan		Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 2,453,128	$ 2,412,699
Interest Income on NonAccrual Loans	$ 89
Number of doubtful loans | Loan	0	0
Loans and lease reserve	$ 35,961	$ 30,740	[1]	$ 12,013	$ 12,121
Loans pledged	2,453,128
Nonperforming trouble debt restructuring		38,300
Amortized Cost of PCD Loans	58,200
Non-Credit Discount on PCD Loans	5,300
Mortgage loans with amortized cost	645	0
Amortized cost of ACL related to PCD loans	639
Collateral Pledged [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and lease reserve	252
Risk Grade 7
Loans and Leases Receivable Disclosure [Line Items]
Gross loans		86,879
Loans pledged	97,813
Grade 5 Pass/Watch [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans		136,557
Paycheck Protection Plan Liquidity Facility Advances [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans pledged	$ 0	51
Minimum [Member] | Grade 5 Pass/Watch [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loan To Value Ratio	90.00%
Commercial and Residential Mortgages [Member] | Asset Pledged as Collateral without Right [Member] | Federal Home Loan Bank Advances [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans pledged	$ 531,800	436,000
Paycheck Protection Program [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	7,988	$ 11,967
Loans pledged	$ 7,988
[1] Derived from audited December 31, 2022 Consolidated Financial Statements, as restated in Amended Form 10-K/A.

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