Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net earnings	$ 5,545	$ 5,601	$ 11,296	$ 10,991
Foreign currency translation adjustments	(1,426)	470	(796)	(1,557)
Pension liability, net of tax of $69, $172, $207, and $492, respectively	107	269	323	770
Total comprehensive income	$ 4,226	$ 6,340	$ 10,823	$ 10,204