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Fair Value - Summary of Quantitative Information about Level 3 Fair Value Measurements (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net $ 7,256 $ 2,187
Fair Value, Nonrecurring [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Balance as of June 30, 2021 $ 438  
Valuation Technique Discounted appraised value  
Unobservable Input Selling costs  
Weighted Average 7.00%  
Fair Value, Nonrecurring [Member] | Selling Costs [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net $ 7,256 $ 2,097
Valuation Technique Discounted appraised value Discounted appraised value
Unobservable Input Selling costs Selling costs
Weighted Average 10.00% 10.00%
Fair Value, Nonrecurring [Member] | Discount Rate [Member]    
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]    
Impaired loans, net   $ 90
Valuation Technique   Discounted cash flows
Unobservable Input   Discount rate
Weighted Average   6.00%