Credit Facility - Additional Information (Detail) (USD $)			6 Months Ended		0 Months Ended		0 Months Ended	6 Months Ended						6 Months Ended
	Mar. 30, 2014	Sep. 29, 2013	Mar. 30, 2014 7.375% Senior Notes [Member]	Mar. 30, 2014 7.75% Senior Notes [Member]	Nov. 29, 2010 Credit Facility [Member]	Mar. 30, 2014 Credit Facility [Member]	Nov. 29, 2010 Term Loan [Member]	Mar. 30, 2014 Term Loan [Member]	Mar. 30, 2014 Term Loan [Member] Eurodollar [Member]	Mar. 30, 2014 Term Loan [Member] Base Rate [Member]	Mar. 30, 2014 Term Loan [Member] 90 day rate [Member]	Mar. 30, 2014 Term Loan [Member] 12 month rate [Member]	Nov. 29, 2010 Revolving Credit Facility [Member]	Mar. 30, 2014 Revolving Credit Facility [Member] Eurodollar [Member]	Mar. 30, 2014 Revolving Credit Facility [Member] Federal Funds Rate [Member]	Mar. 30, 2014 Revolving Credit Facility [Member] Prime Rate [Member]
Debt Instrument [Line Items]
Line of credit facility, amount					$ 245,000,000.0
Term loan maturity period							4 years
Term loan, amount							145,000,000.0
Line of credit facility, amount						62,700,000							100,000,000.0
Quarterly principal payments percentage in years one and two								5.00%
Quarterly principal payments percentage in years three and four								10.00%
Current portion of long-term debt	72,336,000	24,810,000
Base rate									2.50%	1.50%	2.734%	2.849%		2.50%	0.50%	1.50%
Principal amount on interest loan								21,200,000			7,200,000	65,100,000
Contractual quarterly principal payment								10,900,000
Excess cash payment								10,300,000
Senior Notes, amount outstanding			255,000,000	285,000,000
Debt instrument, interest rate			7.375%	7.75%
Debt instrument, maturity date			Nov. 15, 2018	Apr. 15, 2015
Letters of credit available under the credit facility						$ 37,300,000