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Commitments and Contingencies
 12 Months Ended
Jan. 03, 2015
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies
Commitments and Contingencies
Fuel Purchase Obligation
On December 19, 2014, the Company entered into a commitment to purchase fuel from a vendor for a set price and quantity of fuel, beginning in January 2015. The contract has a one-year term, ending December 2015.
Environmental and Legal Matters
From time to time, we are involved in various proceedings incidental to our businesses, and we are subject to a variety of environmental and pollution control laws and regulations in all jurisdictions in which we operate. Although the ultimate outcome of these proceedings cannot be determined with certainty, based on presently available information management believes that adequate reserves have been established for probable losses with respect thereto. Management further believes that the ultimate outcome of these matters could be material to operating results in any given quarter but will not have a materially adverse effect on our long-term financial condition, our results of operations, or our cash flows.
Collective Bargaining Agreements
As of January 3, 2015, we employed approximately 1,700 persons on a full-time basis. Approximately 34% of our employees were represented by various labor unions, of which approximately 30% of the union contracts are up for renewal in fiscal 2015.  We consider our relationship with our employees generally to be good.