Fair Value - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jul. 03, 2015	Jun. 27, 2014	Jul. 03, 2015	Jun. 27, 2014	Sep. 26, 2014	[1]
Fair Value Disclosures [Abstract]
Minimum remaining maturity of derivatives			1 month
Maximum remaining maturity of derivatives			13 months
Transfers of assets or liabilities between fair value measurement levels	$ 0	$ 0	$ 0	$ 0
Fair value of current maturities of long-term debt	50,000,000		50,000,000		$ 50,000,000
Long-term debt	$ 350,000,000		$ 350,000,000		$ 387,500,000

[1] The condensed consolidated balance sheet as of September 26, 2014 was derived from audited financial statements as of that date, but does not include all disclosures required by accounting principles generally accepted in the United States of America.