Debt - Additional Information (Detail) - USD ($)				3 Months Ended	6 Months Ended	12 Months Ended
	Aug. 15, 2014	Aug. 12, 2014	Aug. 16, 2013	Sep. 30, 2014	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 2,151,844,000	$ 2,116,821,000
Net cash position in cash pool					5,700,000
Gross cash position in cash pool					93,200,000
Cash pool borrowings					$ 87,500,000
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					$ 531,581,000	$ 500,265,000
Original issuance discount					$ 5,800,000
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%
Junior lien secured notes issued		25,000,000
Addition junior lien secured notes issued	$ 7,000,000
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					$ 131,300,000
ABL Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 35,000,000
Amount outstanding					$ 18,700,000
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 B Three Loans Due Two Thousand Eighteen [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 B Four Loans Due Two Thousand Eighteen [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					$ 625,425,000	$ 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
Senior Notes, Due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 371,028,000	$ 370,139,000
Original issuance discount					$ 5,300,000
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
Junior Lien Notes Exchange Offer	$ 475,000,000
Debt instrument, total consideration		$ 26,300,000
Debt instrument, discount percentage		5.00%
Capital Leases and Other Financing Arrangements [Member]
Debt Instrument [Line Items]
Debt instrument, outstanding amount					$ 48,471,000	$ 45,589,000