Term Loan	3 Months Ended
Mar. 31, 2015
Debt Instruments [Abstract]
Debt Disclosure [Text Block]	Debt On June 11, 2014, the Company entered into a term loan agreement (the “Term Loan Agreement”), by and among the Company, as borrower, Bank of America, N.A., as administrative agent, and other lenders party thereto. The Term Loan Agreement provides for an unsecured term loan (the "Term Loan") in the amount of $100 million that is scheduled to mature on June 11, 2019, subject to acceleration upon certain specified events of defaults, including breaches of representations or covenants, failure to pay other material indebtedness or a change of control of the Company, as defined in the Term Loan Agreement. The Term Loan bears interest at a rate equal to, at the Company's option, (1) LIBOR plus a margin ranging from 1.00 percent to 1.50 percent depending on the Company’s consolidated leverage ratio or (2) the highest of (a) the Bank of America prime rate, (b) the Federal funds rate plus 0.50 percent or (c) LIBOR plus 1.00 percent, plus a margin ranging from 0.00 percent to 0.50 percent depending on the Company’s consolidated leverage ratio. The Company incurred debt issuance costs of $0.2 million in connection with the issuance of the Term Loan. The debt issuance costs are being amortized to expense over the term of the Term Loan. The weighted-average interest rate of the Term Loan, excluding the amortization of debt issuance costs, was 1.17 percent for the thirteen weeks ended March 31, 2015. As of March 31, 2015, the carrying amount of the Term Loan approximates fair value as the interest rate on the Term Loan approximates current market rates (Level 2 inputs). On November 30, 2012, the Company entered into a credit agreement (the "Credit Agreement") with Bank of America, N.A. and other lenders party thereto. The Credit Agreement provides for an unsecured revolving credit facility of $250 million that will become due on November 30, 2017. As of March 31, 2015 and December 30, 2014, the Company had no loans outstanding under the Credit Agreement. Both the Term Loan Agreement and the Credit Agreement contain customary affirmative and negative covenants, including covenants limiting liens, dispositions, fundamental changes, investments, indebtedness, and certain transactions and payments. In addition, the Term Loan Agreement and the Credit Agreement contain various financial covenants that, among other things, require the Company to satisfy two financial covenants at the end of each fiscal quarter: (1) a consolidated leverage ratio less than or equal to 3.00 to 1.00, and (2) a consolidated fixed charge coverage ratio of greater than or equal to 2.00 to 1.00. As of March 31, 2015, the Company was in compliance with all covenant requirements in the Term Loan Agreement and the Credit Agreement.

Debt

On June 11, 2014, the Company entered into a term loan agreement (the “Term Loan Agreement”), by and among the Company, as borrower, Bank of America, N.A., as administrative agent, and other lenders party thereto. The Term Loan Agreement provides for an unsecured term loan (the "Term Loan") in the amount of $100 million that is scheduled to mature on June 11, 2019, subject to acceleration upon certain specified events of defaults, including breaches of representations or covenants, failure to pay other material indebtedness or a change of control of the Company, as defined in the Term Loan Agreement. The Term Loan bears interest at a rate equal to, at the Company's option, (1) LIBOR plus a margin ranging from 1.00 percent to 1.50 percent depending on the Company’s consolidated leverage ratio or (2) the highest of (a) the Bank of America prime rate, (b) the Federal funds rate plus 0.50 percent or (c) LIBOR plus 1.00 percent, plus a margin ranging from 0.00 percent to 0.50 percent depending on the Company’s consolidated leverage ratio. The Company incurred debt issuance costs of $0.2 million in connection with the issuance of the Term Loan. The debt issuance costs are being amortized to expense over the term of the Term Loan. The weighted-average interest rate of the Term Loan, excluding the amortization of debt issuance costs, was 1.17 percent for the thirteen weeks ended March 31, 2015. As of March 31, 2015, the carrying amount of the Term Loan approximates fair value as the interest rate on the Term Loan approximates current market rates (Level 2 inputs).

On November 30, 2012, the Company entered into a credit agreement (the "Credit Agreement") with Bank of America, N.A. and other lenders party thereto. The Credit Agreement provides for an unsecured revolving credit facility of $250 million that will become due on November 30, 2017. As of March 31, 2015 and December 30, 2014, the Company had no loans outstanding under the Credit Agreement.

Both the Term Loan Agreement and the Credit Agreement contain customary affirmative and negative covenants, including covenants limiting liens, dispositions, fundamental changes, investments, indebtedness, and certain transactions and payments. In addition, the Term Loan Agreement and the Credit Agreement contain various financial covenants that, among other things, require the Company to satisfy two financial covenants at the end of each fiscal quarter: (1) a consolidated leverage ratio less than or equal to 3.00 to 1.00, and (2) a consolidated fixed charge coverage ratio of greater than or equal to 2.00 to 1.00. As of March 31, 2015, the Company was in compliance with all covenant requirements in the Term Loan Agreement and the Credit Agreement.