Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net Income per Share
Net income	$ 9,700	$ 10,287	$ 9,451	$ 19,987	$ 18,559
Weighted average common shares outstanding - Basic	10,103		10,504	10,319	10,475
Plus: Potential dilutive common stock equivalents (in shares)	100		202	125	210
Weighted average common shares outstanding - Diluted (in shares)	10,203		10,706	10,444	10,685
Net income per common share - Basic	$ 0.96		$ 0.90	$ 1.94	$ 1.77
Net income per common share - Diluted	$ 0.95		$ 0.88	$ 1.91	$ 1.74
Stock options and common stock excluded from the income per share calculation as their effect would have been anti-dilutive (in shares)	50