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Notes Payable and Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($)
$ in Thousands
Aug. 31, 2025
Aug. 31, 2024
Debt Instrument [Line Items]    
Notes payable $ 1,152,457 $ 306,831
Total long-term debt 1,784,529  
Debt Issuance Costs, Net (3,894) (4,562)
Other Long-Term Debt 1,529 2,511
Long-term Debt, Fair Value 1,835,833  
Less current portion 90,447 337,266
Long-term portion 1,745,386 1,824,194
Long-term debt    
Debt Instrument [Line Items]    
Finance Lease, Liability 44,751 42,395
Total Long-term Debt    
Debt Instrument [Line Items]    
Finance Lease, Liability $ 55,198 49,511
Unsecured debt | Minimum    
Debt Instrument [Line Items]    
Interest rate 3.90%  
Unsecured debt | Maximum    
Debt Instrument [Line Items]    
Interest rate 9.00%  
term loan    
Debt Instrument [Line Items]    
Interest rate 6.85%  
Notes Payable, Other Payables [Member] | Notes Payable, Other Payables [Member] | Revolving credit facility    
Debt Instrument [Line Items]    
Notes payable $ 584,226 163,136
Private placement, payable in 2025 80k [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 80,000  
Total long-term debt $ 0 80,000
Interest rate 3.85%  
Private placement, payable in 2025 100k [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 100,000  
Total long-term debt $ 0 100,000
Interest rate 3.80%  
Private placement, payable in 2025 150k [Member] [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 150,000  
Total long-term debt $ 0 150,000
Interest rate 4.58%  
Private placement, payable in its entirety in 2026 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 80,000  
Total long-term debt $ 80,000 80,000
Interest rate 4.82%  
Private placement, payable in its entirety in 2027 [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 58,000  
Total long-term debt $ 58,000 58,000
Interest rate 4.69%  
Private placement, payable in its entirety in 2028 [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 95,000  
Total long-term debt $ 95,000 95,000
Interest rate 4.74%  
Private placement, payable in its entirety in 2031 [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 100,000  
Total long-term debt $ 100,000 100,000
Interest rate 4.89%  
Private placement, payable in its entirety 2033 [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 100,000  
Total long-term debt $ 100,000 100,000
Interest rate 4.71%  
Private placement, payable in its entirety in 2036 [Member] | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 125,000  
Total long-term debt $ 125,000 125,000
Interest rate 5.40%  
Private Placement [Member]    
Debt Instrument [Line Items]    
Total long-term debt $ 1,783,000 2,113,000
us-gaap_DebtInstrumentName | us-gaap_LongtermDebtType    
Debt Instrument [Line Items]    
Long-term Debt, Fair Value   2,161,460
Less current portion   337,266
Unsecured term loans    
Debt Instrument [Line Items]    
Total long-term debt 0 1,000
Unsecured term loans | Revolving credit facility    
Debt Instrument [Line Items]    
Total long-term debt 300,000  
Additional Private placement, payable in its entirety in 2027 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount 95,000  
Total long-term debt $ 95,000 95,000
Interest rate 3.24%  
Private placement, payable in its entirety in 2030 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 100,000  
Total long-term debt $ 100,000 100,000
Interest rate 3.48%  
Private placement, payable in its entirety in 2032 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 65,000  
Total long-term debt $ 65,000 65,000
Interest rate 3.58%  
Private placement, payable in its entirety in 2035 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 115,000  
Total long-term debt $ 115,000 115,000
Interest rate 3.73%  
Additional Private placement, payable in its entirety in 2030 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 150,000  
Total long-term debt $ 150,000 150,000
Interest rate 5.68%  
Private placement, payable in its entirety in 2032 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 150,000  
Total long-term debt $ 150,000 150,000
Interest rate 5.84%  
Private placement, payable in its entirety 2034 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 150,000  
Total long-term debt $ 150,000 150,000
Interest rate 5.93%  
Private placement, payable in its entirety in 2037 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 150,000  
Total long-term debt $ 150,000 150,000
Interest rate 6.05%  
Private placement, payable in its entirety in 2039 | Unsecured debt    
Debt Instrument [Line Items]    
Debt Instrument, Face Amount $ 250,000  
Total long-term debt $ 250,000 $ 250,000
Interest rate 6.13%