Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 35.7	$ 61.9	$ 47.8
Financing receivable	32.7
Loans receivable, net, carrying amount	1.0	1.1
Long-term debt:
Redeemable Preferred Stock, carrying amount	21.9
Long-term debt, carrying amount	331.2
Discontinued Operations
Long-term debt:
Lines of credit, carrying amount		1.0
Redeemable Preferred Stock
Long-term debt:
Redeemable Preferred Stock, carrying amount	21.9	0.0
Carrying Amount
Assets
Cash and cash equivalents	35.7	61.9
Financing receivable	32.7
Long-term debt:
Asset-Based Facility, net	19.6
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 | Other Current Assets
Assets
Restricted cash held in escrow (other current assets)	3.9
Carrying Amount | Other Assets
Assets
Loans receivable, net, carrying amount	1.1
Carrying Amount | Other Noncurrent Assets
Assets
Loans receivable, net, carrying amount		1.2
Carrying Amount | Redeemable Preferred Stock
Long-term debt:
Redeemable Preferred Stock, carrying amount	21.9
Estimated Fair Value | Level 1
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	35.7	61.9
Estimated Fair Value | Level 1 | Discontinued Operations
Assets, estimated fair value
Cash and cash equivalents, estimated fair value		1.0
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Assets, estimated fair value
Financing receivable	32.7
Long-term debt:
Asset-Based Facility, Estimated Fair value	22.0
Estimated Fair Value | Level 3
Long-term debt:
Redeemable Preferred Stock, estimated fair value	18.7
Estimated Fair Value | 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 | Other Current Assets | Level 1
Assets, estimated fair value
Cash and cash equivalents, estimated fair value	3.9
Estimated Fair Value | Other Assets | Level 3
Assets, estimated fair value
Loans receivable, net, estimated fair value	1.1
Estimated Fair Value | Other Noncurrent Assets | Level 3
Assets, estimated fair value
Loans receivable, net, estimated fair value		$ 1.2
Senior Secured Notes
Long-term debt:
Senior Secured Notes, net	290.7
Senior Secured Notes | Carrying Amount
Long-term debt:
Senior Secured Notes, net	290.7
Senior Secured Notes | Estimated Fair Value | Level 1
Long-term debt:
Senior Secured Notes, net	$ 310.9