Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Income per Share
Net income	$ 9,108	$ 8,496
Weighted average common shares outstanding - Basic	10,446	10,437
Plus: Potential dilutive common stock equivalents (in shares)	218	128
Weighted average common shares outstanding - Diluted (in shares)	10,664	10,565
Net income per common share - Basic	$ 0.87	$ 0.81
Net income per common share - Diluted	$ 0.85	$ 0.80
Stock options and common stock excluded from the income per share calculation as their effect would have been anti-dilutive (in shares)		154