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Long-Term Debt - Narrative (Details)
3 Months Ended 12 Months Ended
Nov. 21, 2019
USD ($)
Nov. 20, 2019
USD ($)
Dec. 07, 2017
USD ($)
Rate
Dec. 31, 2015
USD ($)
plant
Rate
Dec. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
Rate
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Debt Instrument [Line Items]                
Gain (loss) on the extinguishment of debt           $ 1,000,000.0 $ 4,300,000 $ (11,900,000)
Long-term debt, gross           1,482,800,000    
Proceeds from borrowings of debt           $ 1,050,000,000.0 270,800,000 1,529,800,000
Line of credit facility, unused capacity, daily aggregate commitment threshold of outstanding principal (less than) | Rate           50.00%    
Outstanding principal           $ 1,473,400,000 1,238,000,000.0  
Cash interest paid           55,900,000 63,800,000 69,900,000
Direct costs           $ 9,400,000    
Manufacturing Facility | North America                
Debt Instrument [Line Items]                
Number of plants | plant       2        
London Interbank Offered Rate (LIBOR)                
Debt Instrument [Line Items]                
Basis spread on variable rate | Rate           1.20%    
Maximum                
Debt Instrument [Line Items]                
Unused capacity, commitment fee percentage           0.50%    
Minimum                
Debt Instrument [Line Items]                
Unused capacity, commitment fee percentage | Rate           0.375%    
Term loans | Senior Secured Leverage Ratio (Numerator) | Maximum                
Debt Instrument [Line Items]                
Total net leverage ratio | Rate           675.00%    
Other                
Debt Instrument [Line Items]                
Long-term debt, gross           $ 32,800,000 10,600,000  
Term Refinancing Loan Facility | Term loans                
Debt Instrument [Line Items]                
Maximum borrowing capacity $ 725,000,000.0 $ 800,000,000.0       725,000,000.0    
Remaining borrowing capacity           625,000,000.0    
Long-term debt, voluntary prepayment         $ 100,000,000.0      
Gain (loss) on the extinguishment of debt         $ (700,000) (1,500,000)    
Refinancing related costs           700,000    
Loss on debt extinguishment to write off a portion of the unamortized debt issuance costs           800,000    
Direct costs capitalized           100,000    
Revolving Credit Facility | Term loans                
Debt Instrument [Line Items]                
Maximum borrowing capacity           $ 264,000,000.0    
Weighted-average effective interest rate           4.00%    
Positive ratio | Rate           210.00%    
Unused capacity, commitment fee percentage           0.50%    
Long-term debt, gross           $ 250,000,000.0 0  
Outstanding letters of credit           4,700,000 5,600,000  
Unamortized original issue discount           800,000    
Outstanding principal           $ 249,200,000 0  
Prior Term Loan | Term loans                
Debt Instrument [Line Items]                
Total net leverage ratio | Rate           210.00%    
Long-term debt, voluntary prepayment $ 75,000,000.0           75,000,000.0  
Gain (loss) on the extinguishment of debt             (700,000) (11,900,000)
Refinancing related costs               3,900,000
Loss on debt extinguishment to write off a portion of the unamortized debt issuance costs               8,000,000.0
Direct costs capitalized             800,000 $ 6,000,000.0
Unamortized original issue discount           $ 4,200,000 6,600,000  
Outstanding principal           $ 620,800,000 $ 718,400,000  
Amended Term Refinancing Loan Facility | Term loans                
Debt Instrument [Line Items]                
LIBOR floor, scenario one 0.00%              
Weighted-average effective interest rate           2.74% 4.49%  
Weighted average effective interest rate, over time           3.96% 4.30%  
Amended Term Refinancing Loan Facility | Term loans | London Interbank Offered Rate (LIBOR), Scenario One                
Debt Instrument [Line Items]                
Basis spread on variable rate 1.75% 2.00%            
Amended Term Refinancing Loan Facility | Term loans | London Interbank Offered Rate (LIBOR), Scenario Two                
Debt Instrument [Line Items]                
Basis spread on variable rate 0.75% 1.00%            
Senior notes | 4.875% Senior notes due 2025                
Debt Instrument [Line Items]                
Proceeds from borrowings of debt     $ 500,000,000.0          
Interest rate | Rate     4.875%          
Redemption price, percentage     40.00%          
Percentage of principal amount redeemed     101.00%          
Restricted subsidiaries, amount     $ 50,000,000          
Unamortized original issue discount           $ 4,300,000 $ 5,000,000.0  
Outstanding principal           495,700,000 495,000,000.0  
Other | Accounts Receivable Securitization Program                
Debt Instrument [Line Items]                
Maximum borrowing capacity           100,000,000.0    
Remaining borrowing capacity           $ 100,000,000.0 100,000,000.0  
Weighted-average effective interest rate           2.19%    
Weighted average effective interest rate, over time           2.09%    
Long-term debt, gross           $ 75,000,000.0 0.0  
Outstanding letters of credit           5,700,000 7,100,000  
Unamortized original issue discount           100,000    
Outstanding principal           74,900,000 0  
Other | New Market Tax Credit- Phase 2                
Debt Instrument [Line Items]                
Proceeds from borrowings of long-term debt       $ 9,800,000        
Other | New Market Tax Credit                
Debt Instrument [Line Items]                
Gain (loss) on the extinguishment of debt           3,200,000 5,000,000.0  
Payments to acquire loans receivable       $ 27,600,000        
Loan receivable, terms       30 years        
Loan receivable, stated percentage | Rate       2.00%        
Forgiven associated loans             23,400,000  
Related loans receivable forgiven             17,900,000  
Unamortized original issue discount             $ 500,000  
Outstanding principal           14,000,000.0    
Loans receivable remaining           9,700,000    
Term Loan Facility | Term loans                
Debt Instrument [Line Items]                
Maximum borrowing capacity           $ 264,000,000.0    
Positive ratio | Rate           150.00%    
Term Loan Facility | Term loans | ABR Borrowings                
Debt Instrument [Line Items]                
Basis spread on variable rate           2.00%    
Term Loan Facility | Term loans | Eurocurrency Borrowings                
Debt Instrument [Line Items]                
Basis spread on variable rate           3.00%