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Fair Value - Summary of Quantitative Information about Level 3 Fair Value Measurements (Detail) - Fair Value, Nonrecurring [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net $ 8,344 $ 2,187
Selling Costs [Member]    
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net $ 8,108 $ 2,097
Valuation Technique Discounted appraised value technique Discounted appraised value technique
Unobservable Input Selling Costs Selling Costs
Weighted Average 7.00% 10.00%
Discount Rate [Member]    
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net $ 236 $ 90
Valuation Technique Discounted cash flows technique Discounted cash flows technique
Unobservable Input Discount Rate Discount Rate
Weighted Average   6.00%
OREO $ 157  
Valuation Technique Discounted appraised value technique  
Unobservable Input Discount Rate  
Weighted Average 7.00%  
Discount Rate [Member] | Maximum [Member]    
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items]    
Weighted Average 7.00%  
Discount Rate [Member] | Minimum [Member]    
Disclosure of Other Real Estate Owned Measured on Nonrecurring Vasis Valuation Techniques [Line Items]    
Weighted Average 4.00%