Debt - Additional Information (Detail) - USD ($)				3 Months Ended	9 Months Ended		12 Months Ended
	Aug. 15, 2014	Aug. 12, 2014	Aug. 16, 2013	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jul. 01, 2015
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 2,191,865,000		$ 2,116,821,000
New Money Investment						$ 50,000,000
Loss on extinguishment of debt and refinancing costs						$ (3,537,000)
Net cash position in cash pool					8,400,000
Gross cash position in cash pool					100,300,000
Cash pool borrowings					$ 91,900,000
Junior Lien Notes Exchange Offer [Member]
Debt Instrument [Line Items]
Debt instrument, total consideration		$ 50,000,000
Increase in margin of the term loan					0.25%
Loss on extinguishment of debt and refinancing costs				$ (10,100,000)
Junior Lien Secured Notes, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 564,291,000		$ 500,265,000
Original issuance discount					$ 5,400,000
Debt instrument, maturity year					2018		2018
Junior Lien Secured Notes, Due 2018 [Member] | Junior Lien Notes Exchange Offer [Member]
Debt Instrument [Line Items]
Debt instrument, maturity year	2018
Description of interest payment period by issuance of additional Junior Lien Secured Notes					Six semi-annual interest payments
Debt instrument, cash interest rate	10.00%
Debt instrument, PIK interest rate	12.00%				12.00%
Junior lien secured notes issued		25,000,000
New Money Investment	$ 7,000,000
Senior Notes, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 371,446,000		$ 370,139,000
Original issuance discount					$ 4,900,000
Debt instrument, maturity year					2018		2018
Senior Notes, Due 2018 [Member] | Junior Lien Notes Exchange Offer [Member]
Debt Instrument [Line Items]
Original issuance discount		$ 1,300,000
Debt instrument, interest rate		10.00%
Debt instrument, interest rate of Junior Lien Secured Notes	10%/12%
Debt instrument, maturity year	2018	2018
Exchange Offer Amount	$ 475,000,000
Debt instrument, total consideration		$ 26,300,000
Debt instrument, discount percentage		5.00%
ABL Facility [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 0
Debt instrument, interest rate					4.25%
Line of credit facility, description					Amounts borrowed under the ABL Facility are subject to interest at a rate per annum equal to an applicable margin plus, at the Company's option, either (a) a base rate determined by reference to the highest of (i) the Federal Funds Rate plus .5%, (ii) the prime rate of Citibank, N.A., or (iii) the one month US Dollar LIBOR rate plus 1.0% or (b) the US Dollar LIBOR rate based on the term of the borrowing.
Fixed-charge coverage ratio, description					The ABL Facility requires the Company to maintain a fixed-charge coverage ratio of at least 1.0 to 1.0 and requires certain cash management restrictions, in each case, if available borrowing capacity is less than the greater of 10% of the maximum amount that can be borrowed under the ABL Facility, based on the borrowing base at such time, and $12.0 million.
Line of Credit Facility, Covenant Terms, Minimum Percentage of Loan Cap Amount					10.00%
Line of Credit Facility, Covenant Terms, Minimum Excess Credit Availability					$ 12,000,000
Line of Credit Facility, Covenant Terms, Minimum Fixed Charge Coverage Ratio					100.00%
ABL Facility [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Interest rate margin			0.50%
ABL Facility [Member] | US Dollar LIBOR Rate [Member]
Debt Instrument [Line Items]
Interest rate margin			1.00%
ABL Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 150,000,000
Debt instrument, maturity date					Aug. 16, 2018
Additional borrowing capacity					$ 131,600,000
ABL Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 35,000,000
Amount outstanding					$ 18,400,000
ABL Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Margin percentage for revolving loans, Base Rate					1.00%
Margin percentage for revolving loans, Eurodollar rate					2.00%
Unutilized balance rate per annum					0.25%
ABL Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Margin percentage for revolving loans, Base Rate					1.50%
Margin percentage for revolving loans, Eurodollar rate					2.50%
Unutilized balance rate per annum					0.375%
Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 575,300,000
Senior Secured Credit Facilities [Member] | Term Loan Facility B3 Loans, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 129,645,000		$ 129,645,000
Debt instrument, maturity year					2018		2018
Senior Secured Credit Facilities [Member] | Term Loan Facility B4 Loans, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 445,694,000		$ 445,694,000
Debt instrument, maturity year					2018		2018
Senior Secured Notes, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 625,392,000		$ 625,489,000
Debt instrument, outstanding amount excluding unamortized premium					625,000,000
Unamortized premium received on issuance					$ 400,000
Debt instrument, maturity year					2018		2018
Capital Leases and Other Financing Arrangements [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 55,397,000		$ 45,589,000
International ABL Facility [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 0
Line of credit facility, maximum borrowing capacity								$ 20,000,000