Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 30, 2016	Oct. 02, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 8,045	$ 7,392	$ 18,962	$ 25,443
Other comprehensive income:
Foreign currency translation adjustment	467	359	2,918	(895)
Derivative and hedging activity, net of tax	132	(1,177)	(489)	(1,778)
Pension and post-employment benefit adjustment, net of tax	673	901	2,923	2,705
Net change in other comprehensive income	1,272	83	5,352	32
Comprehensive income	$ 9,317	$ 7,475	$ 24,314	$ 25,475