Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 5,123	$ 8,114	$ 20,817	$ 22,161
Other comprehensive income:
Foreign currency translation adjustment	478	1,271	(2,902)	449
Derivative and hedging activity, net of tax	(428)	(521)	(273)	(858)
Pension and post employment benefit adjustment, net of tax	1,232	835	3,671	2,504
Net change in accumulated other comprehensive income	1,282	1,585	496	2,095
Comprehensive income	$ 6,405	$ 9,699	$ 21,313	$ 24,256