Loans and Allowance for Loan Losses - Summary of Purchased Loans (Detail) - Real Estate [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
30-89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	$ 354	$ 147
30-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
30-89 Days Past Due [Member] | Construction, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
30-89 Days Past Due [Member] | Mortgage, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
30-89 Days Past Due [Member] | Mortgage, Residential [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	354	147
30-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	4
Greater than 90 Days Past Due & Accruing [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Construction, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Mortgage, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Mortgage, Residential [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	0	4
Current [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	58,394	83,878
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	1,481	8,903
Current [Member] | Construction, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	7	14,754
Current [Member] | Mortgage, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	51,223	51,872
Current [Member] | Mortgage, Residential [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	5,324	7,474
Current [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	359	875
Total Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	58,748	84,029
Total Loan [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	1,481	8,903
Total Loan [Member] | Construction, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	7	14,754
Total Loan [Member] | Mortgage, Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	51,223	51,872
Total Loan [Member] | Mortgage, Residential [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	5,678	7,621
Total Loan [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase loans	$ 359	$ 879