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Employee Benefits - Schedule of Shares Under ESOP (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Employee Stock Ownership Plan (ESOP), Shares in ESOP [Abstract]    
Allocated shares 427,488 427,488
Committed to be released shares 38,881  
Unallocated shares 12,961 51,842
Total ESOP shares (in shares) 479,330 479,330
Fair value of unallocated shares (in thousands) $ 445 $ 1,307