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Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Shares  
Beginning balance (in shares) | shares 136,167
Granted (in shares) | shares 52,356
Vested (in shares) | shares (23,782)
Forfeitures (in shares) | shares (738)
Ending balance (in shares) | shares 164,003
Fair Value  
Beginning balance (in dollars per share) | $ / shares $ 46.78
Granted (in dollars per share) | $ / shares 41.59
Vested (in dollars per share) | $ / shares 48.43
Forfeitures (in dollars per share) | $ / shares 46.07
Ending balance (in dollars per share) | $ / shares $ 46.69