Fair Value - Additional Information (Detail) (USD $)	3 Months Ended
	Apr. 03, 2015	Mar. 28, 2014	Sep. 26, 2014
Fair Value Disclosures [Abstract]
Transfers of assets or liabilities between fair value measurement levels	$ 0	$ 0
Fair value of current maturities of long-term debt	50,000,000		50,000,000	[1]
Long-term debt	$ 362,500,000		$ 387,500,000	[1]

[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.