Leases, Balance Sheet Components (Details) - USD ($) $ in Thousands	Aug. 31, 2022	Aug. 31, 2021
Assets:
Operating assets	$ 138,937	$ 112,202
Finance assets	63,702	55,308
Total leased assets	202,639	167,510
Operating lease liabilities:
Current	31,792	26,433
Long-term	111,150	93,409
Total operating lease liabilities	142,942	119,842
Finance lease liabilities:
Current	19,340	16,040
Long-term	39,196	36,104
Total finance lease liabilities	58,536	52,144
Total lease liabilities	$ 201,478	$ 171,986
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other payables	Accrued expenses and other payables
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term Debt, Current Maturities	Long-term Debt, Current Maturities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt