Income Taxes - Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 55,636	$ 70,578	$ 92,582
Gross additions based on tax positions related to the current year	4,094	2,565	3,545
Gross reductions to tax positions related to current year	0	0	0
Gross additions to tax positions related to prior year	460	0	0
Gross reductions for tax positions of prior year	(970)	(13,347)	(13,484)
Reductions from settlements with taxing authorities	(1,941)	0	0
Reductions from lapse of applicable statutes of limitations	(9,308)	(4,160)	(12,065)
Balance at end of year	$ 47,971	$ 55,636	$ 70,578

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

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The gross amount of decreases 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.

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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.

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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.

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

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