Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Sep. 28, 2013	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill impairment	$ 7,709,000	$ 7,709,000	$ 0	$ 0
Senior subordinated notes due date		Jun. 01, 2018
Senior subordinated notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligation to pay principle on the company Senior Subordinates Notes	450,000,000	450,000,000
Senior subordinated notes, percentage	8.25%	8.25%
Senior subordinated notes [Member] | Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior subordinated notes due 2018	449,500,000	449,500,000
Senior subordinated notes [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value and carrying value of senior subordinated Notes	$ 449,400,000	$ 449,400,000