Financing - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 18, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Letters of credit outstanding		$ 2,100,000		$ 2,100,000
Refinancing costs		900,000	$ 20,100,000	900,000	$ 23,400,000
Premium payment				0	17,000,000
ABL Facility [Member]
Debt Instrument [Line Items]
Long-term debt		0		0
Maximum borrowing capacity		200,000,000		200,000,000
Available borrowings		197,900,000		197,900,000
Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term debt		$ 316,800,000		$ 316,800,000		$ 319,200,000
Interest rate				4.50%
Interest rate, decrease	1.00%
Refinancing costs				$ 900,000
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Refinancing costs			20,100,000		23,400,000
Repurchased principal amount			345,300,000		345,300,000
Repurchase amount			362,300,000		362,300,000
Premium payment			14,500,000		17,000,000
Write-off of unamortized debt issuance costs			$ 5,600,000		$ 6,400,000
Maximum [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt prepayment penalty	1.00%
Base Rate [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest rate	2.25%
London Interbank Offered Rate (LIBOR) [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest rate	3.25%