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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Mar. 31, 2019
Carrying value | Interest Rate Swap    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps $ 6,317 $ 0
Carrying value | Senior Notes | 2016 Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 600,000 600,000
Carrying value | Senior Notes | 2013 Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 0 400,000
Carrying value | Senior Notes | 2019 Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 400,000 0
Carrying value | Term Loans | 2012 Term B-5 Loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 690,000 738,000
Carrying value | Revolving Credit Facility | 2012 ABL Revolver    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 55,000 75,000
Fair value | Fair Value, Inputs, Level 2 | Interest Rate Swap    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps 6,317 0
Fair value | Fair Value, Inputs, Level 2 | Senior Notes | 2016 Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 603,000 606,000
Fair value | Fair Value, Inputs, Level 2 | Senior Notes | 2013 Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 0 401,500
Fair value | Fair Value, Inputs, Level 2 | Senior Notes | 2019 Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 386,000 0
Fair value | Fair Value, Inputs, Level 2 | Term Loans | 2012 Term B-5 Loans    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value 638,250 728,775
Fair value | Fair Value, Inputs, Level 2 | Revolving Credit Facility | 2012 ABL Revolver    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt, fair value $ 55,000 $ 75,000