Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 5,171	$ 5,368	$ 5,834	$ 5,740	$ 10,539	$ 11,574
Weighted average common shares outstanding - Basic (in shares)	10,792		10,843		10,838	10,822
Plus: Potential dilutive common stock equivalents (in shares)	96		183		124	189
Weighted average common shares outstanding - Diluted (in shares)	10,888		11,026		10,962	11,011
Net income per common share - Basic (in dollars per share)	$ 0.48		$ 0.54		$ 0.97	$ 1.07
Net income per common share - Diluted (in dollars per share)	$ 0.47		$ 0.53		$ 0.96	$ 1.05
Stock options and common stock excluded from the income per share calculation as their effect would have been anti-dilutive (in shares)	450		251		403	230