Loans and Allowance for Loan Losses - Summary of Investment of PCI Loans (Detail) - Real Estate [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
30-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	$ 24	$ 147
30-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
30-89 Days Past Due [Member] | Construction, commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
30-89 Days Past Due [Member] | Mortgage, Commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
30-89 Days Past Due [Member] | Mortgage, Residential [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	24	147
30-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	4
Greater than 90 Days Past Due & Accruing [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Construction, commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Mortgage, Commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Mortgage, Residential [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	0
Greater than 90 Days Past Due & Accruing [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	0	4
Current [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	65,997	83,878
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	3,516	8,903
Current [Member] | Construction, commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	1,191	14,754
Current [Member] | Mortgage, Commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	55,042	51,872
Current [Member] | Mortgage, Residential [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	5,879	7,474
Current [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	369	875
Total Loans [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	66,021	84,029
Total Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	3,516	8,903
Total Loans [Member] | Construction, commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	1,191	14,754
Total Loans [Member] | Mortgage, Commercial [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	55,042	51,872
Total Loans [Member] | Mortgage, Residential [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	5,903	7,621
Total Loans [Member] | Consumer [Member]
Financing Receivable, Past Due [Line Items]
Purchase loans	$ 369	$ 879