Multipemployer Pension and Postretirement Plans Multiemployer Pension Plans Trusts Funds Contributions (Details)	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Multiemployer Plans [Line Items]
Multiemployer Contribution Percentage	5.00%
Hagerstown Motor Carriers And Teamsters Pension Fund [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	6/30/2015	6/30/2014	6/30/2013
Local 734 Pension Plan [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	4/30/2016	4/30/2015	4/30/2014
Twin Cities Bakery Drivers Pension Plan [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	12/31/2015	12/31/2014	12/31/2013
Upstate New York Bakery Drivers And Industry Pension Fund [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	6/30/2016	6/30/2015	6/30/2014