Reorganization and Realignment Costs G&A Realignment - May 2017 Plan (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	May 01, 2019
Restructuring Cost and Reserve
Reorganization and realignment costs	$ 798	$ 2,626
G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	3,500
Restructuring and Related Cost, Incurred Cost	602	2,535
Restructuring and Related Cost, Cost Incurred to Date	23,031
Reorganization and realignment costs	782	2,626
Restructuring Charges, Cost Incurred to Date	31,230
G&A Realignment – May 2017 Plan | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	500
Restructuring and Related Cost, Incurred Cost	472	2,059
Restructuring and Related Cost, Cost Incurred to Date	19,225
G&A Realignment – May 2017 Plan | Recruitment and relocation costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	1,500
Restructuring and Related Cost, Incurred Cost	114	148
Restructuring and Related Cost, Cost Incurred to Date	1,680
G&A Realignment – May 2017 Plan | Third-party and other costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	500
Restructuring and Related Cost, Incurred Cost	16	328
Restructuring and Related Cost, Cost Incurred to Date	2,126
G&A Realignment – May 2017 Plan | Share based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining	1,000
Restructuring and Related Cost, Incurred Cost	180	91
Restructuring and Related Cost, Cost Incurred to Date	6,864
G&A Realignment – May 2017 Plan | Termination of defined benefit plans
Restructuring Cost and Reserve
Restructuring and Related Cost, Incurred Cost	0	$ 0
Restructuring and Related Cost, Cost Incurred to Date	1,335
G&A Realignment – May 2017 Plan | Minimum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost	32,000
G&A Realignment – May 2017 Plan | Maximum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost	$ 35,000
Subsequent Event | G&A Realignment – May 2017 Plan
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining			$ 2,500
Subsequent Event | G&A Realignment – May 2017 Plan | Severance and related employee costs
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining			1,500
Subsequent Event | G&A Realignment – May 2017 Plan | Share based compensation
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost Remaining			1,000
Subsequent Event | G&A Realignment – May 2017 Plan | Minimum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost			34,500
Subsequent Event | G&A Realignment – May 2017 Plan | Maximum
Restructuring Cost and Reserve
Restructuring and Related Cost, Expected Cost			$ 37,500