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Indebtedness - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 30, 2020
USD ($)
payment
Apr. 30, 2019
USD ($)
Apr. 26, 2007
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 1997
USD ($)
instrument
Jul. 31, 2020
USD ($)
Aug. 02, 2019
USD ($)
Jul. 31, 2020
USD ($)
Aug. 02, 2019
USD ($)
Oct. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Jun. 27, 2019
USD ($)
Jun. 01, 2018
USD ($)
Debt Instrument [Line Items]                            
Fiscal 2020 (remainder)             $ 0.0   $ 0.0          
Fiscal 2021             28,500,000   28,500,000          
Fiscal 2022             161,300,000   161,300,000          
Fiscal 2023             127,200,000   127,200,000          
Fiscal 2024             153,000,000.0   153,000,000.0          
Fiscal 2025             0.0   0.0          
After fiscal 2025             425,000,000.0   425,000,000.0          
Long-term debt             890,905,000 $ 720,681,000 890,905,000 $ 720,681,000 $ 700,813,000      
Current portion of long-term debt             108,869,000 99,877,000 108,869,000 99,877,000 79,914,000      
Long-term debt, less current portion             782,036,000 620,804,000 782,036,000 620,804,000 620,899,000      
Line of Credit                            
Debt Instrument [Line Items]                            
Long-term debt, gross             $ 100,000,000 100,000,000 $ 100,000,000 100,000,000 100,000,000      
Debt instrument, interest rate, stated percentage             7.80%   7.80%          
Debt Securities Issued In June 1997                            
Debt Instrument [Line Items]                            
Debt instrument, face amount           $ 175,000,000.0                
Corporate Debt Securities                            
Debt Instrument [Line Items]                            
Debt instrument, term           30 years                
Long-term debt           $ 100,000,000.0                
Debt instrument, interest rate, stated percentage           7.80% 7.80%   7.80%          
Interest expense, debt             $ 2,000,000.0 6,000,000.0 $ 2,000,000.0 6,000,000.0        
Payment made to terminate interest rate derivatives           $ 23,700,000                
Number of interest rate derivatives held | instrument           3                
Derivative, notional amount           $ 125,000,000.0                
Deferred income earned on swap balance at termination           $ 18,700,000                
Coupon 7.125 Percent Debt Notes                            
Debt Instrument [Line Items]                            
Debt instrument, term           10 years                
Debt instrument, face amount           $ 75,000,000.0                
Debt instrument, interest rate, stated percentage           7.125%                
6.625% senior notes                            
Debt Instrument [Line Items]                            
Debt instrument, basis spread on variable rate     0.30%                      
Senior Notes                            
Debt Instrument [Line Items]                            
Interest expense, debt             2,100,000 6,300,000 2,100,000 6,300,000        
Line of Credit                            
Debt Instrument [Line Items]                            
Debt instrument, term         5 years                  
Maximum borrowing capacity under credit facility                           $ 600,000,000.0
Line of credit facility, maximum borrowing capacity, accordion feature         $ 300,000,000.0                  
Payments of debt issuance costs         1,900,000                  
Long-term debt, gross             0 0 0 0 0      
Debt instrument, unused borrowing capacity, amount             598,000,000.0 598,100,000 598,000,000.0 598,100,000 598,100,000      
Interest expense, debt             0 200,000 800,000 1,900,000        
Senior Notes                            
Debt Instrument [Line Items]                            
Payments of debt issuance costs       $ 600,000                    
Interest expense, debt             900,000 3,700,000 4,300,000 5,300,000        
Senior Notes | $200 million and $300 million term loans                            
Debt Instrument [Line Items]                            
Debt instrument, face amount       $ 500,000,000.0                    
Senior Notes | $200 million term loan                            
Debt Instrument [Line Items]                            
Debt instrument, term       3 years                    
Long-term debt, gross             100,000,000 100,000,000 100,000,000 100,000,000 100,000,000      
Debt instrument, face amount       $ 200,000,000.0     200,000,000   200,000,000          
Repayments of long-term lines of credit                 100,000,000.0          
Senior Notes | $300 million term loan                            
Debt Instrument [Line Items]                            
Debt instrument, term       5 years                    
Long-term debt, gross             180,000,000 200,000,000 180,000,000 200,000,000 180,000,000      
Debt instrument, face amount       $ 300,000,000.0     300,000,000   300,000,000          
Amortization payment percentage       2.50%                    
Principal payment requirement term       3 years 3 months                    
Repayments of long-term lines of credit                 120,000,000.0          
Senior Notes | $190 million term loan                            
Debt Instrument [Line Items]                            
Debt instrument, term 3 years                          
Long-term debt, gross             190,000,000 0 190,000,000 0 0      
Debt instrument, face amount $ 190,000,000.0           $ 190,000,000   $ 190,000,000          
Debt instrument, interest rate, stated percentage             0.75%   0.75%          
Current portion of long-term debt             $ 108,900,000   $ 108,900,000          
Long-term debt, current maturities, amortization payments             19,000,000.0   19,000,000.0          
Interest expense, debt             1,100,000   1,500,000          
Long-term debt, less current portion             89,900,000   89,900,000          
Senior Notes | Series A and Series B Senior Notes                            
Debt Instrument [Line Items]                            
Debt issuance costs, gross                       $ 700,000    
Interest expense, debt             1,900,000 800,000 5,800,000 800,000        
Senior Notes | Series A and Series B Senior Notes | Debt Instrument, Redemption, Period One                            
Debt Instrument [Line Items]                            
Debt instrument, redemption price, percentage   10.00%                        
Senior Notes | Series A and Series B Senior Notes | Debt Instrument, Redemption, Period Two                            
Debt Instrument [Line Items]                            
Debt instrument, redemption price, percentage   100.00%                        
Senior Notes | Series A and Series B Senior Notes | Debt Instrument, Redemption, Period Three                            
Debt Instrument [Line Items]                            
Debt instrument, redemption price, percentage   100.00%                        
Senior Notes | 3.81% series A senior notes                            
Debt Instrument [Line Items]                            
Long-term debt, gross             $ 100,000,000 100,000,000 $ 100,000,000 100,000,000 100,000,000      
Debt instrument, face amount   $ 100,000,000.0                     $ 100,000,000.0  
Debt instrument, interest rate, stated percentage   3.81%         3.81%   3.81%          
Senior Notes | 3.91% series B senior notes                            
Debt Instrument [Line Items]                            
Long-term debt, gross             $ 100,000,000 100,000,000 $ 100,000,000 100,000,000 100,000,000      
Debt instrument, face amount   $ 100,000,000.0                     $ 100,000,000.0  
Debt instrument, interest rate, stated percentage   3.91%         3.91%   3.91%          
Senior Notes | 6.625% senior notes                            
Debt Instrument [Line Items]                            
Debt instrument, face amount     $ 125,000,000.0                      
Debt instrument, interest rate, stated percentage     6.625%       6.625%   6.625%          
Debt instrument issuance price as percentage of par value     98.513%                      
Debt instrument, unamortized discount     $ 1,900,000                      
Unamortized debt issuance expense     $ 1,500,000                      
Debt instrument, interest rate, effective percentage             6.741%   6.741%          
Debt instrument, repurchase offer due to change of control and downgrade of notes below an investment grade rating, percentage of principal                 101.00%          
Standby Letters of Credit | Line of Credit                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity under credit facility         10,000,000.0                  
Long-term debt             $ 2,000,000.0 $ 1,900,000 $ 2,000,000.0 $ 1,900,000 $ 1,900,000      
Bridge Loan | Line of Credit                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity under credit facility         $ 30,000,000.0                  
Debt Instrument, Repayment Period One | Senior Notes | $190 million term loan                            
Debt Instrument [Line Items]                            
Amortization payments, number of payments, year one | payment 4                          
Amortization payment percentage 5.00%                          
Debt Instrument, Repayment Period Two | Senior Notes | $190 million term loan                            
Debt Instrument [Line Items]                            
Amortization payments, loan percentage, thereafter 7.50%