Earnings per Share and Shareholders' Equity Share Repurchase (Details) - USD ($) $ in Thousands	3 Months Ended		159 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Aug. 31, 2024	Aug. 31, 2023
Equity [Abstract]
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	2,607,189		2,607,189
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 398,009	$ 321,676	$ 398,009	$ 391,979	$ 326,620
Net (loss) earnings	21,723	17,738
Other Comprehensive (Loss) Income, Net of Tax	(9,676)	370
Stock Issued During Period, Value, Employee Benefit Plan	91	51
Stock Issued During Period, Value, Restricted Stock Award, Gross	0	0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	3,345	2,717
Stock Value Issued to Acquired For and Distributed From Rabbi Trust	0	90
Retained earnings	$ 279,239		279,239	$ 261,870
Treasury Stock, Value, Acquired, Cost Method		$ 26,116	$ 843,200
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	10,000,000		10,000,000
Treasury Stock, Common, Shares	0		0	0
Stock Repurchased During Period, Shares	109,860
Treasury Stock, Shares, Acquired			30,192,041
Stock Repurchased During Period, Value	$ 4,400
Common Stock [Member]
Stock Issued During Period, Shares, New Issues	54,400,000	83,967,000	54,400,000	54,235,000	83,761,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 10,880	$ 16,793	$ 10,880	$ 10,847	$ 16,752
Stock Issued During Period, Shares, Employee Benefit Plan	2,000	2,000
Stock Issued During Period, Value, Employee Benefit Plan	$ 0	$ 0
Stock Issued During Period, Shares, Restricted Stock Award, Gross	186,000	118,000
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 37	$ 23
Stock Issued To Acquired For And Distributed From Rabbi Trust	0	3,000
Stock Value Issued to Acquired For and Distributed From Rabbi Trust	$ 0	$ 1
Treasury Stock, Shares, Retired	(110,000)
Additional Paid-in Capital [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 233,964	223,474	233,964	235,660	220,472
Stock Issued During Period, Value, Employee Benefit Plan	91	51
Stock Issued During Period, Value, Restricted Stock Award, Gross	37	23
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	3,345	2,717
Stock Value Issued to Acquired For and Distributed From Rabbi Trust	0	89
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	279,239	1,028,871	279,239	261,870	1,011,112
Net (loss) earnings	21,723	17,738
AOCI Attributable to Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(126,074)	(120,840)	(126,074)	(116,398)	(121,210)
Other Comprehensive (Loss) Income, Net of Tax	(9,676)	370
Stock held in trust [member] [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(3,774)	(3,576)	(3,774)	(3,777)	(3,484)
Stock Value Issued to Acquired For and Distributed From Rabbi Trust	(3)	92
Deferred Compensation, Share-based Payments [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,774	3,576	$ 3,774	$ 3,777	$ 3,484
Stock Value Issued to Acquired For and Distributed From Rabbi Trust	$ (3)	$ 92