Income Taxes Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 27, 2016	Dec. 29, 2015	Dec. 30, 2014
Results of Operations, Income before Income Taxes [Abstract]
Income (Loss) before Income Taxes, United States	$ 240,843,000	$ 242,860,000	$ 285,564,000
Income (Loss) before Income Taxes, Canada	(11,344,000)	(6,288,000)	(8,270,000)
Income before income taxes	229,499,000	236,572,000	277,294,000
Income Tax Expense (Benefit) [Abstract]
Current Federal Tax Expense (Benefit)	72,757,000	83,005,000	73,234,000
Current State Tax Expense (Benefit)	15,169,000	16,242,000	14,306,000
Current Income Tax Expense (Benefit)	87,926,000	99,247,000	87,540,000
Deferred Federal Income Tax Expense (Benefit)	(3,062,000)	(9,737,000)	9,609,000
Deferred State Income Tax Expense (Benefit)	(606,000)	(2,263,000)	950,000
Deferred Foreign Income Tax Expense (Benefit)	0	0	(98,000)
Deferred Income Tax Expense (Benefit)	(3,668,000)	(12,000,000)	10,461,000
Total provision for income taxes	$ 84,258,000	$ 87,247,000	$ 98,001,000
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)	4.10%	4.10%	4.10%
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	(1.90%)	(1.80%)	(1.40%)
Other Adjustments (as a percent)	(0.50%)	(0.40%)	(2.40%)
Effective Income Tax Rate, Continuing Operations (as a percent)	36.70%	36.90%	35.30%
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred Tax Assets, Accrued Expenses	$ 83,411,000	$ 75,360,000
Deferred Tax Assets, Capital Loss Carryforwards	10,968,000	0
Deferred Tax Assets, Share-based Compensation Cost	5,739,000	4,705,000
Deferred Tax Assets, Operating Loss Carryforwards	358,000	4,938,000
Deferred Tax Assets, Other	1,926,000	2,160,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	(11,326,000)	(5,299,000)
Deferred Tax Assets, Net of Valuation Allowance	91,076,000	81,864,000
Deferred Tax Liabilities, Property, Plant and Equipment	(96,437,000)	(92,580,000)
Deferred Tax Liabilities, Goodwill and Intangible Assets	(26,940,000)	(25,252,000)
Deferred Tax Liabilities, Gross	(123,377,000)	(117,832,000)
Deferred Tax Liabilities, Net	(32,301,000)	(35,968,000)
Deferred Tax Liabilities, Net, Noncurrent	(32,301,000)	(35,968,000)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Starting Unrecognized Tax Benefits	6,668,000	6,455,000	$ 2,999,000
Increases Resulting from Current Period Tax Positions	1,131,000	1,339,000	1,536,000
Increases Resulting from Prior Period Tax Positions	422,000	0	2,671,000
Decreases Resulting from Prior Period Tax Positions	0	(483,000)	0
Decreases Resulting from Settlements	(113,000)	(200,000)	(131,000)
Expiration of Statute of Limitations	(556,000)	(443,000)	(620,000)
Ending Unrecognized Tax Benefits	$ 7,552,000	$ 6,668,000	$ 6,455,000