Inventories, Net - Summary of Inventories, Net of Allowance for Obsolescence (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Sep. 26, 2015	Dec. 27, 2014
Inventory, Net [Abstract]
Raw materials	$ 118,827	$ 94,969	$ 111,012
Work in progress	15,086	15,268	13,006
Finished goods	271,134	215,673	260,314
Supplies	11,411	10,036	15,604
Total inventories, net	$ 416,458	$ 335,946	$ 399,936

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.6(a)(1))
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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of products used directly or indirectly in the manufacturing or production process, which may or may not become part of the final product. May also include items used in the storage, presentation or transportation of physical goods.

+ References

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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