Schedule of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Income Tax Disclosure [Line Items]
Federal, Current	$ 68,722us-gaap_CurrentFederalTaxExpenseBenefit	$ 53,089us-gaap_CurrentFederalTaxExpenseBenefit	$ 64,148us-gaap_CurrentFederalTaxExpenseBenefit
State, Current	7,031	4,643	2,305
Canadian, Current	1,199us-gaap_CurrentForeignTaxExpenseBenefit	683us-gaap_CurrentForeignTaxExpenseBenefit	1,013us-gaap_CurrentForeignTaxExpenseBenefit
Total current	76,952us-gaap_CurrentIncomeTaxExpenseBenefit	58,415us-gaap_CurrentIncomeTaxExpenseBenefit	67,466us-gaap_CurrentIncomeTaxExpenseBenefit
Federal, Deferred	5,234	5,758	3,462
State, Deferred	200	284	135
Total deferred	5,434us-gaap_DeferredIncomeTaxExpenseBenefit	6,042us-gaap_DeferredIncomeTaxExpenseBenefit	3,597us-gaap_DeferredIncomeTaxExpenseBenefit
Income taxes	$ 82,386us-gaap_IncomeTaxExpenseBenefit	$ 64,457us-gaap_IncomeTaxExpenseBenefit	$ 71,063us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.