Debt - Private Placement Debt Narrative (Details) - USD ($)	Nov. 30, 2024	Aug. 31, 2024
Private Placement Debt | Senior Notes Series B
Debt Instrument [Line Items]
Principal amount	$ 100,000,000	$ 100,000,000
Interest rate	2.90%
Private Placement Debt | Senior Notes Due June 11, 2025
Debt Instrument [Line Items]
Principal amount	$ 20,000,000	20,000,000
Interest rate	3.79%
Private Placement Debt | Senior notes, Due March 5, 2027
Debt Instrument [Line Items]
Principal amount	$ 50,000,000	50,000,000
Interest rate	2.60%
Private Placement Debt | Senior Notes Due April 18, 2027
Debt Instrument [Line Items]
Principal amount	$ 50,000,000	$ 50,000,000
Interest rate	5.73%
Senior Notes | Senior Notes Due April 18, 2027
Debt Instrument [Line Items]
Principal amount	$ 50,000,000
Interest rate	5.73%