Income Taxes (Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 25, 2012	Dec. 27, 2011	Dec. 28, 2010
Reconciliation unrecognized tax benefits
Beginning balance	$ 9,527	$ 9,049	$ 9,799
Purchase accounting adjustments	(6,682)	0	0
Additions based on tax positions related to the current year	2,439	64	42
Lapse of applicable statute of limitations	(895)	(50)	(1,682)
Additional interest / penalties accrued	218	634	890
Adjustments to prior year positions	0	(170)	0
Ending balance	$ 4,607	$ 9,527	$ 9,049

Additional interest penalties accrued.

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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Gross amount of decreases in unrecognized tax benefits resulting from acquisitions.

+ References

No definition available.

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- Definition

The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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