Income Taxes (Effective Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Expected tax benefit at federal statutory income tax rate	$ (29,221)	$ (25,121)	$ (8,683)
State and local income tax benefit	(1,411)	(1,706)	(1,075)
Change in valuation allowance	27,693	34,049	55,374
Change in contingency reserves	(118)	(105)	(94)
Non-U.S. tax rate differences	(169)	42	(1,063)
Non-deductible expenses	4,120	3,260	2,426
Change in state tax rates	1,379	(272)	1,564
Expiration of stock option contracts	0	968	7,007
Other	561	2,638	264
Income tax expense	$ 2,834us-gaap_IncomeTaxExpenseBenefit	$ 13,753us-gaap_IncomeTaxExpenseBenefit	$ 55,720us-gaap_IncomeTaxExpenseBenefit

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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