Reorganization and Realignment Costs G&A Realignment - May 2017 Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Restructuring Cost and Reserve
Restructuring Charges	$ 2,888	$ 2,129	$ 20,768	$ 7,866
G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	1,851		15,402
Restructuring Charges	$ 2,656	$ 0	$ 19,901	$ 0
Expected costs incurred by the end of 2017	66.67%		66.67%
G&A Realignment – May 2017 Plan | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	$ 3,000		$ 3,000
Restructuring and Related Cost, Incurred Cost	1,210		14,436
G&A Realignment – May 2017 Plan | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	4,000		4,000
Restructuring and Related Cost, Incurred Cost	145		145
G&A Realignment – May 2017 Plan | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	1,000		1,000
Restructuring and Related Cost, Incurred Cost	496		821
G&A Realignment – May 2017 Plan | Share based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	3,000		3,000
Restructuring Charges	805		4,499
G&A Realignment – May 2017 Plan | Share-based compensation expense newly granted
Restructuring Cost and Reserve
Restructuring Charges	652		652
G&A Realignment – May 2017 Plan | Minimum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost	28,000		28,000
Restructuring and Related Cost, Expected Cost Remaining	8,000		8,000
G&A Realignment – May 2017 Plan | Maximum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost	33,000		33,000
Restructuring and Related Cost, Expected Cost Remaining	$ 13,000		$ 13,000