Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Comprehensive Income [Abstract]
Net Earnings	$ 41,584	$ 32,713	$ 34,803
Other Comprehensive Income (Loss), net of tax:
Foreign currency translation adjustments, net of income tax (expense) of $(25), $- and $-, respectively	552	(3,141)	762
Pension adjustments, net of income tax benefit (expense) of $889, $2,354 and $(98), respectively	(1,648)	(3,822)	73
Total Other Comprehensive (Loss) Income, net of tax	(1,096)	(6,963)	835
Comprehensive Income	$ 40,488	$ 25,750	$ 35,638