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Fair Value of Financial Instruments and Long Term Debt - Narrative (Details) - USD ($)
12 Months Ended
Apr. 21, 2023
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2022
Debt Instrument        
Long-term debt and capital lease obligations   $ 1,375,000,000 $ 1,437,000,000  
Finance lease liabilities (Note 7)   $ 101,818,000 $ 95,072,000  
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]   Long-term debt and finance lease obligations, net of current maturities Long-term debt and finance lease obligations, net of current maturities  
Interest income   $ 11,736,000 $ 7,823,000 $ 48,000
Capitalized interest   3,363,000 3,631,000 $ 2,031,000
Line of Credit | Revolving Credit Facility        
Debt Instrument        
Fair value of amount outstanding $ 50,000,000      
Line of Credit | Letter of Credit        
Debt Instrument        
Maximum borrowing capacity   308,000    
Line of Credit | New Credit Agreement Term Loan Facility        
Debt Instrument        
Maximum borrowing capacity $ 250,000,000      
Quarterly principal payment as a percentage 1.25%      
Line of Credit | New Credit Agreement Revolving Credit Facility | Revolving Credit Facility        
Debt Instrument        
Maximum borrowing capacity $ 850,000,000      
Fair value of amount outstanding   0 0  
Line of Credit | Credit Facilities        
Debt Instrument        
Maximum increase in borrowing capacity $ 900,000,000      
Maximum increase in borrowing capacity as a percentage of consolidated EBITDA 100.00%      
Line of Credit | Credit Facilities | Secured Overnight Financing Rate (SOFR)        
Debt Instrument        
Basis spread on variable rate 0.10%      
Line of Credit | Credit Facilities | Adjusted Daily Simple Secured Overnight Financing Rate        
Debt Instrument        
Basis spread on variable rate 1.00%      
Line of Credit | Credit Facilities | Fed Funds Effective Rate Overnight Index Swap Rate        
Debt Instrument        
Basis spread on variable rate 0.50%      
Line of Credit | Term Loan Facility | Line of Credit        
Debt Instrument        
Fair value of amount outstanding   237,500,000 250,000,000  
Line of Credit | Bank Line        
Debt Instrument        
Fair value of amount outstanding   $ 0 $ 0  
Minimum | Line of Credit | New Credit Agreement Revolving Credit Facility | Revolving Credit Facility        
Debt Instrument        
Facility fee percentage 0.15%      
Minimum | Line of Credit | Credit Facilities | Secured Overnight Financing Rate (SOFR)        
Debt Instrument        
Basis spread on variable rate 0.00%      
Minimum | Line of Credit | Credit Facilities | Base Rate        
Debt Instrument        
Basis spread on variable rate 1.10%      
Minimum | Line of Credit | Credit Facilities | Adjusted Daily Simple Secured Overnight Financing Rate        
Debt Instrument        
Basis spread on variable rate 1.00%      
Minimum | Line of Credit | Credit Facilities | Alternate Base Rate        
Debt Instrument        
Basis spread on variable rate 0.10%      
Maximum | Line of Credit | New Credit Agreement Revolving Credit Facility | Revolving Credit Facility        
Debt Instrument        
Facility fee percentage 0.30%      
Maximum | Line of Credit | Credit Facilities | Base Rate        
Debt Instrument        
Basis spread on variable rate 1.70%      
Maximum | Line of Credit | Credit Facilities | Alternate Base Rate        
Debt Instrument        
Basis spread on variable rate 0.70%