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Long-Term Debt and Line of Credit - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Nov. 07, 2019
Mar. 16, 2018
Jul. 07, 2017
Feb. 29, 2020
Debt Instrument [Line Items]        
Letters of Credit Outstanding, Amount       $ 5.0
Term Loan        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Effective Percentage       5.70%
Proceeds from long-term line of credit $ 460.0      
Term Loan | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate 3.75%      
Finance leases        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Effective Percentage       5.60%
Barclays Bank PLC and Other Parties | Term Loan        
Debt Instrument [Line Items]        
Borrowing capacity     $ 200.0  
Maturity period     7 years  
Barclays Bank PLC and Other Parties | Revolving Credit Facility        
Debt Instrument [Line Items]        
Borrowing capacity     $ 75.0  
Maturity period     5 years  
Proceeds from long-term line of credit       $ 0.0
Net leverage ratio (equal to or less than)     6.25  
Net leverage ratio post reduction (equal to or less than)     6.00  
Percent of commitments (in excess of)     30.00%  
Repayments of principal in next twelve months       $ 0.0
Line of Credit | Base Rate        
Debt Instrument [Line Items]        
Basis spread on variable rate 2.75%      
Line of Credit | Barclays Bank PLC and Other Parties | Base Rate        
Debt Instrument [Line Items]        
Basis spread on variable rate   2.50% 0.50%  
Line of Credit | Barclays Bank PLC and Other Parties | Eurocurrency        
Debt Instrument [Line Items]        
Basis spread on variable rate     1.00%  
Line of Credit | Barclays Bank PLC and Other Parties | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate   3.50%    
Line of Credit | Barclays Bank PLC and Other Parties | Term Loan | Eurocurrency        
Debt Instrument [Line Items]        
Basis spread on variable rate     3.00%  
Line of Credit | Barclays Bank PLC and Other Parties | Term Loan | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate     4.00%  
Interest rate floor     1.00%  
Line of Credit | Barclays Bank PLC and Other Parties | Revolving Credit Facility | Eurocurrency        
Debt Instrument [Line Items]        
Basis spread on variable rate     2.00%  
Line of Credit | Barclays Bank PLC and Other Parties | Revolving Credit Facility | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate     3.00%