Income Taxes Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011
Results of Operations, Income before Income Taxes [Abstract]
Income (Loss) before Income Taxes, United States	$ 317,479,000	$ 286,702,000	$ 221,906,000
Income (Loss) before Income Taxes, Canada	(4,759,000)	(3,706,000)	(2,003,000)
Income before income taxes	312,720,000	282,996,000	219,903,000
Income Tax Expense (Benefit) [Abstract]
Current Federal Tax Expense (Benefit)	87,548,000	72,434,000	67,466,000
Current State Tax Expense (Benefit)	18,638,000	15,955,000	15,705,000
Current Foreign Tax Expense (Benefit)	0	0	(571,000)
Current Income Tax Expense (Benefit)	106,186,000	88,389,000	82,600,000
Deferred Federal Income Tax Expense (Benefit)	8,547,000	16,640,000	1,084,000
Deferred State Income Tax Expense (Benefit)	1,804,000	3,603,000	267,000
Deferred Foreign Income Tax Expense (Benefit)	14,000	916,000	0
Deferred Income Tax Expense (Benefit)	10,365,000	21,159,000	1,351,000
Income Tax Expense (Benefit)	116,551,000	109,548,000	83,951,000
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory rate provision (as a percent)	35.00%	35.00%	35.00%
State Income Taxes (as a percent)	4.50%	4.50%	4.50%
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	(0.80%)	(0.40%)	(0.40%)
Other Adjustments (as a percent)	(1.40%)	(0.40%)	(0.90%)
Effective Income Tax Rate, Continuing Operations (as a percent)	37.30%	38.70%	38.20%
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred Tax Assets, Accrued Expenses	71,245,000	78,198,000
Deferred Tax Assets, Share-based Compensation Cost	3,534,000	3,002,000
Deferred Tax Assets, Operating Loss Carryforwards	3,124,000	1,761,000
Deferred Tax Assets, Other	1,008,000	139,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	(3,173,000)	(1,761,000)
Deferred Tax Assets, Net	75,738,000	81,339,000
Deferred Tax Liabilities, Property, Plant and Equipment	(90,940,000)	(88,590,000)
Deferred Tax Liabilities, Goodwill and Intangible Assets	(22,307,000)	(19,902,000)
Deferred Tax Liabilities, Gross	113,247,000	108,492,000
Deferred Tax Liabilities, Net	(37,509,000)	(27,153,000)
Deferred Tax Assets, Net of Valuation Allowance, Current	27,889,000	33,502,000
Deferred Tax Liabilities, Net, Noncurrent	(65,398,000)	(60,655,000)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Starting Unrecognized Tax Benefits	3,051,000	3,544,000	2,896,000
Increases Resulting from Current Period Tax Positions	653,000	530,000	526,000
Increases Resulting from Prior Period Tax Positions	256,000	217,000	264,000
Decreases Resulting from Prior Period Tax Positions	(49,000)	(341,000)	(142,000)
Decreases Resulting from Settlements	(425,000)	(58,000)	0
Expiration of Statute of Limitations	(487,000)	(841,000)	0
Ending Unrecognized Tax Benefits	$ 2,999,000	$ 3,051,000	$ 3,544,000