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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Mar. 31, 2021
Carrying Value | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps $ 973 $ 2,363
Senior Notes | 2021 Senior Notes | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 600,000 600,000
Senior Notes | 2019 Senior Notes | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 400,000 400,000
Term Loans | Term B-5 Loans | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 0 495,000
Term Loans | Loans Payable, Term B-5 Amendment No. 6 | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 600,000 0
Revolving Credit Facility | 2012 ABL Revolver | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
2012 ABL Revolver 20,000 0
Fair Value, Measurements, Recurring | Fair Value | Fair Value, Inputs, Level 2 | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Interest rate swaps 973 2,363
Fair Value, Measurements, Recurring | Senior Notes | 2021 Senior Notes | Fair Value | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 577,500 570,000
Fair Value, Measurements, Recurring | Senior Notes | 2019 Senior Notes | Fair Value | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 416,000 417,000
Fair Value, Measurements, Recurring | Term Loans | Term B-5 Loans | Fair Value | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 0 493,763
Fair Value, Measurements, Recurring | Term Loans | Loans Payable, Term B-5 Amendment No. 6 | Fair Value | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, senior notes and term loans 599,250 0
Fair Value, Measurements, Recurring | Revolving Credit Facility | 2012 ABL Revolver | Fair Value | Fair Value, Inputs, Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
2012 ABL Revolver $ 20,000 $ 0