Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 170,773	$ 136,152
Goodwill additions	4,100	46,880
Goodwill, Translation and Purchase Accounting Adjustments	(6,937)	1,962
Goodwill, end of period	$ 167,936	$ 184,994