Income Taxes - Change in Uncertain Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,201us-gaap_UnrecognizedTaxBenefits	$ 1,785us-gaap_UnrecognizedTaxBenefits	$ 2,161us-gaap_UnrecognizedTaxBenefits
Reductions due to lapses in statutes of limitations	(301)	(30)	(44)
Reductions due to payments for tax positions settled		(271)	(379)
Reductions due to reversals of prior year positions	(38)	(736)	(651)
Additions based on tax positions taken during the current period	301	453	698
Balance at end of year	$ 1,163us-gaap_UnrecognizedTaxBenefits	$ 1,201us-gaap_UnrecognizedTaxBenefits	$ 1,785us-gaap_UnrecognizedTaxBenefits

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Publisher FASB

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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