Fair Value Measurements - Summary of Information about Valuation Processes Used to Determine Nonrecurring Fair Value Measurements (Detail) - Fair Value, Nonrecurring [Member]	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 751,000	$ 0
Loans Held for Sale	3,860,000	1,015,000
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	751,000
Loans Held for Sale	$ 3,860,000	$ 1,015,000
Fair Value, Inputs, Level 3 [Member] | Measurement Input Liquidation Expenses Rate [Member] | Appraisal Of Collateral [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	10
Fair Value, Inputs, Level 3 [Member] | Measurement Input Liquidation Collateral Rate [Member] | Appraisal Of Collateral [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Range (Weighted Average)	15	10