Discontinued Operations Net Income (Loss) from Bakery Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended							7 Months Ended	9 Months Ended	12 Months Ended
	Jan. 01, 2017	Oct. 02, 2016	Apr. 03, 2016	Jan. 03, 2016	Jun. 28, 2015	Mar. 29, 2015	Dec. 29, 2013	Jan. 03, 2016	Sep. 27, 2015	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes										$ 0	$ 10,494	$ 5,010
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
Net income (loss) from discontinued operations										0	21,163	5,010
Proceeds from sales										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]
Revenues											25,885	62,561
Cost of sales											(7,543)	(45,710)
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)											18,342	16,851
General and administrative											(1,093)	(2,525)
Depreciation and amortization											(2,297)	(5,471)
Other expense, net											(19)	(126)
Income (loss) from discontinued operations before income taxes											14,933	8,729
(Provision for) benefit from income taxes											(4,439)	(3,719)
Income (loss) from discontinued operations, net of income taxes											10,494	5,010
Gain on disposal of discontinued operations before income taxes											25,529	0
Provision for income taxes on gain on disposal											(14,860)	0
Gain on disposal of discontinued operations, net of income taxes											10,669	0
Net income (loss) from discontinued operations											21,163	5,010
Severance Related Costs Associated with Discontinued Operation											791
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)
Sale of Other Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales										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]
Proceeds from sales											50	52
Gain on sales of other assets, net											$ 32	$ 69
Cost of Sales [Member] | Bakery [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Amount of Continuing Cash Flows after Disposal								$ 8,358		$ 10,176
Cost of Sales [Member] | Withdrawal from Multiemployer Defined Benefit Plan [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)						$ (12,486)	$ 13,500