Discontinued Operations Gain on Disposal of the Bakery (Details) - USD ($) $ in Thousands	3 Months Ended					9 Months Ended	12 Months Ended
	Jan. 01, 2017	Oct. 02, 2016	Apr. 03, 2016	Jan. 03, 2016	Jun. 28, 2015	Sep. 27, 2015	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014	May 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of the Bakery							$ 0	$ 78,408	$ 0
Goodwill allocated to the sale of the Bakery							(30,132)	(32,942)
Gain on disposal of discontinued operations before income taxes							0	25,529	0
Gain on disposal of discontinued operations, net of income taxes							0	10,669	0
Dispositions							262,173	204,388	161,386
Gain on sales of other assets, net	$ 23,825	$ 37,756	$ 8,426	$ 59,258	$ 15,654		71,931	74,009	91,510
Bakery [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of the Bakery								78,408
Net working capital								5,655
Net properties sold								30,664
Goodwill allocated to the sale of the Bakery							0	(12,067)
Other								2,684
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Post Closing Adjustments, before Income Tax								27,338
Post-closing adjustments on the sale of the Bakery								(1,809)
Gain on disposal of discontinued operations before income taxes								25,529	0
Provision for income taxes								(14,860)	0
Gain on disposal of discontinued operations, net of income taxes								10,669	0
Disposal Group, Including Discontinued Operation, Consideration										$ 78,500
Withdrawal from Multiemployer Defined Benefit Plan [Member] | Bakery [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)						$ (12,486)
Obligation for Employer Provided Health Insurance [Member] | Bakery [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other						$ (1,993)
Sale of Other Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Dispositions							10,727	10,478	17,263
Gain on sales of other assets, net							$ 6,204	1,672	5,089
Sale of Other Assets [Member] | Bakery [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Dispositions								50	52
Gain on sales of other assets, net								$ 32	$ 69