Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 25, 2012	Dec. 27, 2011
Assets:
Insurance reserves	$ 9,078	$ 8,139
Deferred gains	769	1,553
Profit sharing and vacation	6,833	6,359
Uncertain tax position benefit	783	3,299
General business credit carryforwards	13,450	964
Other	6,493	6,113
Unfavorable leasehold interests	4,933	0
Transaction costs	82	9,077
Total deferred tax assets	42,421	35,504
Liabilities:
Depreciation and amortization	(232,661)	(140,594)
Debt refinancing	(4,294)	0
Favorable leasehold interests	(3,564)
Other	(2,747)	(2,275)
Total deferred tax liabilities	(243,266)	(142,869)
Net deferred tax liability	(200,845)	(107,365)
Current asset	17,445	16,369
Non-current liability	$ (218,290)	$ (123,734)