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Basis of Presentation - Schedule of Effects of Reclassifying Debt Issuance Costs from Long Term Assets to a Direct Deduction from Carrying Amount of Related Debt Liability (Detail)

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Basis of Presentation - Schedule of Effects of Reclassifying Debt Issuance Costs from Long Term Assets to a Direct Deduction from Carrying Amount of Related Debt Liability (Detail) - USD ($)
$ in Thousands
Dec. 26, 2015
Sep. 26, 2015
Dec. 27, 2014
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Other assets $ 70,987 $ 30,419 $ 9,104
Total assets 1,211,209 1,131,597 1,184,307
Long term debt 435,893 396,691 395,257
Total liabilities and equity $ 1,211,209 1,131,597 1,184,307
Previously Reported [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Other assets   33,576 13,760
Total assets   1,134,754 1,188,963
Long term debt   399,848 399,913
Total liabilities and equity   1,134,754 1,188,963
Reclassifications [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Other assets   (3,157) (4,656)
Total assets   (3,157) (4,656)
Long term debt   (3,157) (4,656)
Total liabilities and equity   $ (3,157) $ (4,656)