Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Assets
Cash and cash equivalents	$ 44.9	$ 62.0	$ 44.6
Long-term debt:
Asset-Based Facility, net	54.9
Capital leases	4.5
Discontinued Operations
Long-term debt:
Lines of credit, carrying amount		1.0
Senior Secured Notes
Long-term debt:
Senior Secured Notes, net	290.3
Carrying Amount
Assets
Cash and cash equivalents	44.9	62.0
Long-term debt:
Asset-Based Facility, net	54.9
Capital leases	4.5
Carrying Amount | Discontinued Operations
Assets
Cash and cash equivalents		1.0
Long-term debt:
Lines of credit, carrying amount		1.0
Long-term debt, carrying amount		13.6
Carrying Amount | Senior Secured Notes
Long-term debt:
Senior Secured Notes, net	290.3
Carrying Amount | Other Current Assets
Assets
Restricted cash held in escrow (other current assets)	3.9
Carrying Amount | Other Noncurrent Assets
Assets
Loans receivable, net, carrying amount	1.2	1.2
Estimated Fair Value | Quoted Prices in Active Markets (Level 1)
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	44.9	62.0
Estimated Fair Value | Quoted Prices in Active Markets (Level 1) | Discontinued Operations
Assets, estimated fair value
Cash and cash equivalents, estimated fair value		1.0
Estimated Fair Value | Significant Unobservable Inputs (Level 3)
Long-term debt:
Capital leases, estimated fair value	4.5
Redeemable Preferred Stock, estimated fair value	20.5
Estimated Fair Value | Significant Unobservable Inputs (Level 3) | Discontinued Operations
Long-term debt:
Lines of credit, estimated fair value		1.0
Long-term debt, estimated fair value		13.6
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Long-term debt:
Asset-Based Facility, Estimated Fair value	54.9
Estimated Fair Value | Senior Secured Notes | Quoted Prices in Active Markets (Level 1)
Long-term debt:
Senior Secured Notes, net	315.7
Estimated Fair Value | Other Current Assets | Quoted Prices in Active Markets (Level 1)
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	3.9
Estimated Fair Value | Other Noncurrent Assets | Significant Unobservable Inputs (Level 3)
Assets, estimated fair value
Loans receivable, net, estimated fair value	1.2	$ 1.2
Redeemable Preferred Stock
Long-term debt:
Redeemable Preferred Stock, carrying amount	21.2
Redeemable Preferred Stock | Carrying Amount
Long-term debt:
Redeemable Preferred Stock, carrying amount	$ 21.2