Other (income) expense, net (Summary of other expense (income)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Other Nonoperating Income (Expense) [Abstract]
Foreign currency (gains) losses, net	$ 3,537	$ (1,033)	$ 3,080	$ 4,855
All other, net	(609)	(522)	(1,235)	(1,520)
Total other (income) expense, net	$ 2,928	$ (1,555)	$ 1,845	$ 3,335