Multiemployer Pension And Postretirement Plans (Multiemplyer Pension Plans Trust Funds Contributions) (Details) (Multiemployer Pension Plans Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2011	Jan. 02, 2010 Philadelphia Bakery Employers and Food Driver Salesmen's Union, Local Four Six Three and the Teamsters Union Local Six Seven Six Pension Fund [Member]	Dec. 31, 2011 Hagerstown Motor Carriers and Teamsters Pension Fund [Member]	Jan. 01, 2011 Hagerstown Motor Carriers and Teamsters Pension Fund [Member]	Jan. 01, 2011 Twin Cities Bakery Drivers Pension Plan [Member]	Jan. 02, 2010 Twin Cities Bakery Drivers Pension Plan [Member]
Multiemployer Plans [Line Items]
Percentage of total contributions by pension plan, minimum	5.00%
Plan year end date contributions to pension plan exceeded 5 percent of total contributions		2009-07-31	2011-06-30	2010-06-30	2010-12-31	2009-12-31