Long-Term Debt - Components of Long-Term Debt (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Mar. 08, 2010
Components of long-term debt
Unamortized discount	$ 471
Senior Subordinated Notes, Net of Unamortized Discount, Interest at 8.25%, Payable Semi-annually, Principal Due March 2018 [Member]
Components of long-term debt
Debt instrument interest rate stated, percentage	8.25%		8.25%
Unamortized discount	$ 471	$ 583
Debt instrument maturity period	Mar. 01, 2018
Option Two [Member] | Asset-based Revolving Credit Facility, Interest at LIBOR Plus a Margin of 1.25% to 1.75% or Base Rate Plus a Margin of 0.25% to 0.75%, Final Maturity December 2018 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	0.25%
Option One [Member] | Asset-based Revolving Credit Facility, Interest at LIBOR Plus a Margin of 1.25% to 1.75% or Base Rate Plus a Margin of 0.25% to 0.75%, Final Maturity December 2018 [Member]
Components of long-term debt
Debt instrument maturity period	Dec. 31, 2018
Applicable interest rate on the Credit Facility	1.25%
Option One [Member] | Revolving Credit Facility, Interest at Alternate Base Rate Plus a Margin of 0.75% to 1.75%, or LIBOR Plus a Margin of 1.75% to 2.75%, Final Maturity June 2016 [Member]
Components of long-term debt
Debt instrument maturity period	Jun. 30, 2016
Minimum [Member] | Option Two [Member] | Asset-based Revolving Credit Facility, Interest at LIBOR Plus a Margin of 1.25% to 1.75% or Base Rate Plus a Margin of 0.25% to 0.75%, Final Maturity December 2018 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	0.25%
Minimum [Member] | Option Two [Member] | Revolving Credit Facility, Interest at Alternate Base Rate Plus a Margin of 0.75% to 1.75%, or LIBOR Plus a Margin of 1.75% to 2.75%, Final Maturity June 2016 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	1.75%
Minimum [Member] | Option One [Member] | Asset-based Revolving Credit Facility, Interest at LIBOR Plus a Margin of 1.25% to 1.75% or Base Rate Plus a Margin of 0.25% to 0.75%, Final Maturity December 2018 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	1.25%
Minimum [Member] | Option One [Member] | Revolving Credit Facility, Interest at Alternate Base Rate Plus a Margin of 0.75% to 1.75%, or LIBOR Plus a Margin of 1.75% to 2.75%, Final Maturity June 2016 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	0.75%
Maximum [Member] | Option Two [Member] | Asset-based Revolving Credit Facility, Interest at LIBOR Plus a Margin of 1.25% to 1.75% or Base Rate Plus a Margin of 0.25% to 0.75%, Final Maturity December 2018 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	0.75%
Maximum [Member] | Option Two [Member] | Revolving Credit Facility, Interest at Alternate Base Rate Plus a Margin of 0.75% to 1.75%, or LIBOR Plus a Margin of 1.75% to 2.75%, Final Maturity June 2016 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	2.75%
Maximum [Member] | Option One [Member] | Asset-based Revolving Credit Facility, Interest at LIBOR Plus a Margin of 1.25% to 1.75% or Base Rate Plus a Margin of 0.25% to 0.75%, Final Maturity December 2018 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	1.75%
Maximum [Member] | Option One [Member] | Revolving Credit Facility, Interest at Alternate Base Rate Plus a Margin of 0.75% to 1.75%, or LIBOR Plus a Margin of 1.75% to 2.75%, Final Maturity June 2016 [Member]
Components of long-term debt
Applicable interest rate on the Credit Facility	1.75%