Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 4,632	$ 2,907
Other comprehensive income (loss):
Foreign currency translation adjustment	140	(521)
Employee benefit funded status adjustment, net of tax	121	162
Comprehensive income	$ 4,893	$ 2,548