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Long-Term Debt (Narrative 2012 Term Loan and 2012 ABL Revolver) (Details) - USD ($)
12 Months Ended
Mar. 21, 2018
Feb. 04, 2016
Jun. 09, 2015
Sep. 03, 2014
Feb. 21, 2013
Jan. 31, 2012
Mar. 31, 2019
Jan. 26, 2017
May 08, 2015
2012 ABL Revolver | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt instrument, term           5 years      
Line of credit facility, maximum borrowing capacity           $ 50,000,000.0 $ 135,000,000    
Revolving credit facility, increase in borrowing capacity             $ 85,000,000    
Debt instrument, interest rate, decrease (as percent)             0.25%    
Line of credit facility, commitment fee (as percent)           0.50%      
Line of credit facility, conditional commitment fee (as percent)             0.375%    
Revolver increase in accordion feature     $ 35,000,000.0            
Debt instrument, average interest rate (as percent)             3.80%    
2012 ABL Revolver | Revolving Credit Facility | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate, fixed component (as percent)       1.00%          
2012 ABL Revolver | Revolving Credit Facility | LIBOR | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument, conditional variable rate (as percent)       2.00%          
2012 ABL Revolver | Revolving Credit Facility | LIBOR | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, conditional variable rate (as percent)       2.25%          
2012 ABL Revolver | Revolving Credit Facility | Base Rate | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument, conditional variable rate (as percent)       1.00%          
2012 ABL Revolver | Revolving Credit Facility | Base Rate | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, conditional variable rate (as percent)       1.25%          
2012 ABL Revolver | Revolving Credit Facility | Federal Funds Rate                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate, fixed component (as percent)       0.50%          
ABL Revolver Amendment 4 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt instrument, term     5 years            
2012 ABL Revolver, Amendment No. 3 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Revolving credit facility, increase in borrowing capacity       $ 40,000,000.0          
ABL Amendment No. 5 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt Instrument, temporary suspension of financial reporting covenant, period   60 days              
2012 ABL Revolver, Amendment No. 6 | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Revolving credit facility, increase in borrowing capacity               $ 40,000,000.0  
Term Loans | 2012 Term Loan                  
Debt Instrument [Line Items]                  
Debt instrument, face amount           $ 660,000,000.0      
Debt instrument, term           7 years      
Debt instrument, discount (as percent)           1.50%      
Proceeds from issuance of long-term debt           $ 650,100,000      
Term Loans | 2012 Term Loan, Amendment No. 1 | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent)         2.75%        
Debt instrument, reference rate floor (as percent)         1.00%        
Term Loans | 2012 Term Loan, Amendment No. 1 | Base Rate                  
Debt Instrument [Line Items]                  
Debt instrument, reference rate floor (as percent)         2.00%        
Term Loans | 2012 Term Loan, Amendment No. 2                  
Debt Instrument [Line Items]                  
Debt instrument, reference rate floor (as percent)       1.00%          
Term Loans | 2012 Term Loan, Amendment No. 2 | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent)       3.125%          
Term Loans | 2012 Term Loan, Amendment No. 2 | Base Rate                  
Debt Instrument [Line Items]                  
Debt instrument, reference rate floor (as percent)       2.00%          
Term Loans | 2012 Senior Notes | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent)             2.00%    
Term Loans | 2012 Senior Notes | Base Rate                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent)             1.00%    
Term Loans | Term B-5 Loans | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent) 2.00%                
Debt instrument, reference rate floor (as percent) 0.00%                
Term Loans | Term B-5 Loans | Base Rate                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent) 1.00%                
Debt instrument, reference rate floor (as percent) 1.00%                
2012 Term B-3 Loan | 2012 Term Loan, Amendment No. 3                  
Debt Instrument [Line Items]                  
Debt instrument, face amount                 $ 852,500,000.0
2012 Term B-1 Loan | 2012 Term Loan, Amendment No. 3                  
Debt Instrument [Line Items]                  
Debt instrument, face amount                 207,500,000.0
2012 Term B-2 Loan | 2012 Term Loan, Amendment No. 2                  
Debt Instrument [Line Items]                  
Debt instrument, face amount       $ 720,000,000.0          
2012 Term B-2 Loan | 2012 Term Loan, Amendment No. 2 | LIBOR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate (as percent)       3.50%          
Debt instrument, reference rate floor (as percent)       1.00%          
2012 Term B-2 Loan | 2012 Term Loan, Amendment No. 2 | Base Rate                  
Debt Instrument [Line Items]                  
Debt instrument, reference rate floor (as percent)       2.00%          
Interest rate, contingent margin step-down per annum (as percent)       3.25%          
2012 Term B-2 Loan | 2012 Term Loan, Amendment No. 3                  
Debt Instrument [Line Items]                  
Debt instrument, face amount                 $ 645,000,000.0
2012 Term B-4 Loans | 2012 Senior Notes                  
Debt Instrument [Line Items]                  
Debt instrument, face amount               $ 1,427,000,000.0  
Debt instrument, average interest rate (as percent)             4.90%