Earnings Per Share - Basic and diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net earnings	$ 5,607	$ 4,864	$ 12,257	$ 12,309
Denominator:
Basic weighted average shares outstanding (in shares)	9,429	9,440	9,433	9,461
Effect of dilutive securities:
Employee share-based awards (in shares)	119	102	131	164
Diluted weighted average shares outstanding (in shares)	9,548	9,542	9,564	9,625
Basic earnings per share (in dollars per share)	$ 0.60	$ 0.51	$ 1.30	$ 1.30
Diluted earnings per share (in dollars per share)	$ 0.59	$ 0.50	$ 1.28	$ 1.28