Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2015	Mar. 31, 2015
2012 ABL Revolver | Market Value | Fair Value, Inputs, Level 2 | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, fair value disclosure	$ 45.9	$ 65.7
2012 ABL Revolver | Carrying Value | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit, fair value disclosure	46.1	66.1
Senior Notes | 2013 Senior Notes | Market Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable, fair value disclosure	398.5	405.0
Senior Notes | 2013 Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable, fair value disclosure	400.0	400.0
Senior Notes | 2012 Senior Notes | Market Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable, fair value disclosure	266.9	268.1
Senior Notes | 2012 Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable, fair value disclosure	250.0	250.0
Term Loans | 2012 Term Loan | Market Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable, fair value disclosure	851.4	880.5
Term Loans | 2012 Term Loan | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans payable, fair value disclosure	$ 852.5	$ 877.5