Stock-based Compensation Plan - Summary of Stock Option Activity (Details) - Stock Options	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Stock Options
Beginning balance (in shares) | shares	83,465
Acquisitions (in shares) | shares	0
Exercised (in shares) | shares	(56,428)
Forfeited (in shares) | shares	0
Ending balance (in shares) | shares	27,037
Exercisable (in shares) | shares	21,462
Weighted- Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 19.61
Acquisitions (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	17.60
Forfeited (in dollars per share) | $ / shares	0
Ending balance (in dollars per share) | $ / shares	23.81
Exercisable (in dollars per share) | $ / shares	$ 23.29