Stock-based Compensation Plan - Summary of Restricted Stock Unit Activity (Details) - Restricted Stock Units	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Restricted Stock Units
Beginning balance (in shares) | shares	176,661
Granted (in shares) | shares	114,024
Vested (in shares) | shares	(99,556)
Forfeited (in shares) | shares	(2,235)
Ending balance (in shares) | shares	188,894
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 41.01
Granted (in dollars per share) | $ / shares	43.72
Vested (in dollars per share) | $ / shares	40.66
Forfeited (in dollars per share) | $ / shares	43.30
Ending balance (in dollars per share) | $ / shares	$ 42.81