Fair Value Disclosures - Quantitative Information about Level 3 Fair Value Measurements (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Discounted Cash Flows [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique		Discounted cash flows
Minimum [Member] | Discounted Cash Flows [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell		4.00%
Maximum [Member] | Discounted Cash Flows [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell		8.75%
OREO [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	Discounted appraisals
OREO [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell	0.00%
OREO [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell	10.00%
Individually Evaluated Loans
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	Discounted appraisals
Individually Evaluated Loans | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell	0.00%
Individually Evaluated Loans | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell	25.00%
Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique		Discounted appraisals
Impaired Loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell		0.00%
Impaired Loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value inputs discount rate and estimated costs to sell		25.00%