Goodwill and Other Intangible Assets Goodwill (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013
Goodwill [Roll Forward]
Goodwill (gross), beginning of period	$ 317,957	$ 326,089
Accumulated Impairment Losses, beginning of period	(79,868)	(79,868)
Goodwill (net), beginning of period	238,089	246,221
Foreign currency translation	(5,576)	(4,285)
Goodwill (gross), end of period	312,381	321,804
Accumulated Impairment Losses, end of period	(79,868)	(79,868)
Goodwill (net), end of period	$ 232,513	$ 241,936