Comprehensive Income (Details) - Equity Component [Domain] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net earnings	$ 2,085	$ 2,501	$ 5,677	$ 5,751
Foreign currency translation adjustments	97	546	(1,500)	630
Pension liability, net of tax of $173, $61, $347, and $138, respectively	272	96	543	216
Total comprehensive income	$ 2,454	$ 3,143	$ 4,720	$ 6,597