Quarterly report pursuant to Section 13 or 15(d)

Securities - Additional Information (Detail)

v3.22.2.2
Securities - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]          
Proceeds from sales of securities $ 0 $ 0 $ 0 $ 8,035,000  
Net gains in earnings resulting from sale of securities       99,000  
Net unrealized gains recorded in accumulated other comprehensive income       $ 100,000  
Available for sale securities pledged as collateral $ 24,500,000   $ 24,500,000   $ 34,700,000
Minimum | U.S. Government and its Agencies          
Debt Securities, Available-for-sale [Line Items]          
Holdings of securities as percentage of share holders' equity 10.00%   10.00%