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Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 25, 2013	Dec. 26, 2012
Supplemental Cash Flow Information [Abstract]
Income taxes paid, net	$ 3,802us-gaap_IncomeTaxesPaidNet	$ 2,777us-gaap_IncomeTaxesPaidNet	$ 2,034us-gaap_IncomeTaxesPaidNet
Interest paid	8,170us-gaap_InterestPaid	9,336us-gaap_InterestPaid	12,918us-gaap_InterestPaid
Noncash investing and financing activities:
Notes received in connection with disposition of property	0us-gaap_NotesIssued1	0us-gaap_NotesIssued1	290us-gaap_NotesIssued1
Accrued purchase of property	635us-gaap_CapitalExpendituresIncurredButNotYetPaid	1,575us-gaap_CapitalExpendituresIncurredButNotYetPaid	1,570us-gaap_CapitalExpendituresIncurredButNotYetPaid
Issuance of common stock, pursuant to share-based compensation plans	1,030us-gaap_StockIssued1	1,937us-gaap_StockIssued1	1,151us-gaap_StockIssued1
Execution of capital leases	3,300us-gaap_CapitalLeaseObligationsIncurred	5,663us-gaap_CapitalLeaseObligationsIncurred	2,643us-gaap_CapitalLeaseObligationsIncurred
Treasury stock payable	$ 152us-gaap_LiabilitiesAssumed1	$ 220us-gaap_LiabilitiesAssumed1	$ 560us-gaap_LiabilitiesAssumed1

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- Definition

Future cash outflow to pay for purchases of fixed assets that have occurred.

+ References

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The increase during the period in capital lease obligations due to entering into new capital leases.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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