Employee Benefits - Stock Option Plan Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Beginning balance (in shares)	245,153	248,006
Granted (in shares)	15,000	5,000
Exercised (in shares)	(20,106)	(1,800)
Forfeited (in shares)	(21,364)	(6,053)
Ending balance (in shares)	218,683	245,153	248,006
Exercisable (in shares)	180,241	166,974
Weighted Average Exercise Price
Beginning balance (in shares)	$ 24.36	$ 24.39
Granted (in dollars per share)	18.60	23.60
Exercised (in dollars per share)	22.69	22.25
Forfeited (in dollars per share)	26.55	25.57
Ending balance (in shares)	23.91	24.36	$ 24.39
Exercisable (in dollars per share)	$ 23.80	$ 23.71
Weighted Average Remaining Contractual Life in Years
Outstanding (in years)	5 years 9 months 18 days	6 years 6 months	7 years 6 months
Exercisable (in years)	5 years 4 months 24 days	6 years 3 months 18 days
Restricted Stock
Number of Shares
Nonvested at year end (in shares)	38,442	78,179
Weighted Average Exercise Price
Nonvested at year end (in dollars per share)	$ 24.40	$ 25.76
Weighted Average Remaining Service Period in Years
Nonvested at year end	8 years	7 years