Debt and Redeemable Preferred Stock - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Feb. 27, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Amortization of debt issuance costs				$ 3.7	$ 3.7
Capital leases due within next twelve months		$ 2.4		2.4
Capital leases		$ 4.6		$ 4.6		$ 4.1
Redeemable Preferred Stock
Debt Instrument [Line Items]
Redeemable preferred stock accrued dividends payment percentage on liquidation preference		8.00%		8.00%
Preferred stock, dividend payment terms				Dividends are paid in-kind for the first two years, and thereafter will be paid in cash.
Liquidation preference value		$ 27.9		$ 27.9
Preferred stock redemption period				66 months
Redeemable Preferred Stock | First Eighteen Months
Debt Instrument [Line Items]
Redeemable preferred stock dividends rate	7.00%
Redeemable Preferred Stock | Following Twelve Months
Debt Instrument [Line Items]
Redeemable preferred stock dividends rate	8.00%
Redeemable Preferred Stock | Thereafter
Debt Instrument [Line Items]
Redeemable preferred stock dividends rate	9.00%
Senior Secured Notes
Debt Instrument [Line Items]
Debt, interest expense		$ 8.7	$ 8.7	$ 25.9	25.2
Debt, due date		Jan. 15, 2019
Amortization of debt issuance costs		$ 1.1	1.1	3.1	3.2
Asset Based Facility
Debt Instrument [Line Items]
Debt, interest expense		0.5	0.5	1.6	1.1
Amortization of debt issuance costs		$ 0.2	$ 0.2	$ 0.7	$ 0.5