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Fair Value Measurements (Details) - USD ($)
Mar. 31, 2016
Mar. 31, 2015
Senior Notes | 2016 Senior Notes | Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure $ 350,000,000 $ 0
Senior Notes | 2016 Senior Notes | Fair value | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 363,125,000 0
Senior Notes | 2013 Senior Notes | Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 400,000,000 400,000,000
Senior Notes | 2013 Senior Notes | Fair value | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 408,000,000 405,000,000
Senior Notes | 2012 Senior Notes | Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 0 250,000,000
Senior Notes | 2012 Senior Notes | Fair value | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 0 268,100,000
Term Loans | 2012 Term Loan | Carrying value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 817,500,000 877,500,000
Term Loans | 2012 Term Loan | Fair value | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans payable, fair value disclosure 818,522,000 880,500,000
Revolving Credit Facility | 2012 ABL Revolver    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Line of credit, fair value disclosure 85,000,000 66,100,000
Revolving Credit Facility | 2012 ABL Revolver | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Line of credit, fair value disclosure $ 85,000,000 $ 65,700,000