Goodwill and Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2016	Jul. 01, 2017	Dec. 31, 2016
Other intangible assets
Gross		$ 626,756	$ 623,870
Accumulated Amortization		(257,962)	(229,422)
Net		368,794	394,448
Impairment charge	$ 1,900
Backlog
Other intangible assets
Gross		7,970	8,370
Accumulated Amortization		(7,341)	(6,390)
Net		629	1,980
Backlog | CDMO Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Other intangible assets
Decrease in intangible assets resulting from divestiture of business		300
Technology
Other intangible assets
Gross		74,788	71,425
Accumulated Amortization		(20,539)	(14,314)
Net		54,249	57,111
Trademarks and trade names
Other intangible assets
Gross		8,465	8,177
Accumulated Amortization		(4,311)	(4,124)
Net		4,154	4,053
Other
Other intangible assets
Gross		16,978	16,775
Accumulated Amortization		(6,564)	(5,628)
Net		10,414	11,147
Other intangible assets
Other intangible assets
Gross		108,201	104,747
Accumulated Amortization		(38,755)	(30,456)
Net		69,446	74,291
Client relationships
Other intangible assets
Gross		518,555	519,123
Accumulated Amortization		(219,207)	(198,966)
Net		299,348	$ 320,157
Client relationships | CDMO Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Other intangible assets
Decrease in intangible assets resulting from divestiture of business		$ 16,800