Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basic EPS
Net income	$ 11,357	$ 10,869	$ 11,011	$ 8,639	$ 9,675	$ 9,154	$ 8,543	$ 8,388	$ 41,876	$ 35,760	$ 32,569
Weighted average shares outstanding									28,266,509	27,734,994	27,674,705
Basic earnings per share									$ 1.48	$ 1.29	$ 1.18
Diluted EPS
Net income	$ 11,357	$ 10,869	$ 11,011	$ 8,639	$ 9,675	$ 9,154	$ 8,543	$ 8,388	$ 41,876	$ 35,760	$ 32,569
Weighted average shares outstanding									28,266,509	27,734,994	27,674,705
Average unvested restricted stock awards									127,487	140,990	299,480
Weighted average shares for diluted earnings per share									28,393,996	27,875,984	27,974,185
Diluted earnings per share	$ 0.40	$ 0.38	$ 0.39	$ 0.30	$ 0.35	$ 0.33	$ 0.31	$ 0.30	$ 1.47	$ 1.28	$ 1.16