Capital Stock Share Repurchases - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		8 Months Ended	12 Months Ended			132 Months Ended	156 Months Ended
	Dec. 18, 2023	Aug. 31, 2024	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2022	Aug. 31, 2024	Mar. 16, 2015	Oct. 01, 2014	Mar. 29, 2014	Sep. 28, 2011
Capital Unit [Line Items]
Common stock, shares authorized		168,000,000	168,000,000	168,000,000			168,000,000
Common stock, par value		$ 0.20	$ 0.20	$ 0.20			$ 0.20
Common stock, shares issued		54,234,660	54,234,660	83,760,798			54,234,660
Cumulative Preferred Stock, shares authorized share		160,000	160,000				160,000
Cumulative Preferred Stock, par value		$ 1.00	$ 1.00				$ 1.00
Cumulative Preferred Stock, issued		0	0				0
Shares authorized in buyback program		10,000,000	10,000,000				10,000,000	7,000,000	7,000,000	7,000,000	7,000,000
Share Repurchase Program, Remaining Authorized, Number of Shares		2,717,049	2,717,049				2,717,049
Stock Repurchased During Period, Shares		240,972	1,309,466				30,082,181
Stock Repurchased During Period, Value			$ 38,400			$ 838,900
Treasury Stock, Value, Acquired, Cost Method			$ 38,354	$ 57,662	$ 75,112
Treasury Stock, Common, Shares		0	0	28,772,715			0
Expected forfeiture rate			12.00%	12.00%	12.00%
Treasury Stock, Shares, Retired	29,841,209
Additional Paid-in Capital
Capital Unit [Line Items]
Stock Repurchased and Retired During Period, Value	$ 824,600
Par Value
Capital Unit [Line Items]
Stock Repurchased and Retired During Period, Value	$ 6,000
Common Class A
Capital Unit [Line Items]
Common stock, shares authorized		168,000,000	168,000,000				168,000,000
Common stock, par value		$ 0.20	$ 0.20				$ 0.20
Common stock, shares issued		54,234,660	54,234,660				54,234,660
Common stock, shares outstanding		54,234,660	54,234,660				54,234,660
Common Class B
Capital Unit [Line Items]
Common stock, shares authorized		1,500,000	1,500,000				1,500,000
Common stock, par value		$ 0.20	$ 0.20				$ 0.20
Common stock, shares issued		0	0				0
Common stock, shares outstanding				0