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Term B Loan - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
May 29, 2018
May 28, 2018
Apr. 04, 2017
Sep. 30, 2018
Oct. 01, 2017
Sep. 30, 2018
Oct. 01, 2017
Apr. 01, 2018
Debt Instrument [Line Items]                
Proceeds of initial term B loan           $ 0 $ 194,252,000  
Payment of term B loan principal           $ 990,000 1,000,000  
Senior Notes | Term B Loan                
Debt Instrument [Line Items]                
Principal amount of debt $ 198,000,000.0   $ 200,000,000          
Debt instrument, term     7 years          
Proceeds of initial term B loan     $ 194,300,000          
Percentage of original principal amount to be repaid           0.25%    
Basis spread on variable rate               2.00%
Payment of term B loan principal       $ 500,000   $ 1,000,000 $ 500,000  
Senior Notes | Term B Loan | LIBOR                
Debt Instrument [Line Items]                
Decrease in interest rate 0.50%              
Basis spread on variable rate 2.50% 3.00%            
Senior Notes | Term B Loan | Base Rate                
Debt Instrument [Line Items]                
Basis spread on variable rate           2.00%    
Minimum | Senior Notes | Term B Loan                
Debt Instrument [Line Items]                
Interest rate during period       4.59%        
Maximum | Senior Notes | Term B Loan                
Debt Instrument [Line Items]                
Interest rate during period         4.15%