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Loan Commitments and Other Related Activities (Tables)
9 Months Ended
Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]  
Summary of Financial Instruments With Off-Balance Sheet Risk
The contractual amounts of financial instruments with off-balance sheet risk at September 30, 2021 and December 31, 2020 were as follows:
September 30, 2021December 31, 2020
Unfunded loan commitments
$57,592 $34,867 
Unused lines of credit
43,263 34,063 
Standby letters of credit
68 68