Schedule of long-term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Capital leases	$ 4.6	$ 4.1
Current portion of long-term debt	(2.4)	(2.3)
Total long-term debt, net	339.8	312.1
Senior Secured Notes
Debt Instrument [Line Items]
Principal amount outstanding	305.0	305.0
Unamortized original issue discount and issuance costs	(11.2)	(14.3)
Senior Secured Notes, net	293.8	290.7
Asset Based Facility
Debt Instrument [Line Items]
Principal amount outstanding	45.5	22.0
Unamortized original issue discount and issuance costs	(1.7)	(2.4)
Senior Secured Notes, net	$ 43.8	$ 19.6

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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