CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Tax Benefit From Stockbased Compensation [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Total
Balance at Aug. 31, 2010	$ 3	$ 379,368	$ 4,490	$ (16,672)	$ (15,578)	$ (15,568)	$ 336,043
Balance (in shares) at Aug. 31, 2010	30,625					727
Purchase of treasury stock						(2,513)	(2,513)
Purchase of treasury stock (in shares)						65	0
Issuance of restricted stock awards (in shares)	62						0
Forfeiture of restricted stock awards (in shares)	(2)						0
Exercise of stock options		104					104
Exercise of stock options (in shares)	4
Stock-based compensation		1,964	881				2,845
Dividend payable to stockholders					(8,969)		(8,969)
Dividend paid to stockholders					(8,969)		(8,969)
Change in fair value of interest rate swaps, net of tax				137			137
Net income					32,770		32,770
Translation adjustment				(30)			(30)
Comprehensive income							32,877
Balance at Feb. 28, 2011	3	381,436	5,371	(16,565)	(746)	(18,081)	351,418
Balance (in shares) at Feb. 28, 2011	30,689					792
Balance at Aug. 31, 2011	3	383,549	5,242	(22,915)	28,238	(18,279)	375,838
Balance (in shares) at Aug. 31, 2011	30,696					796
Purchase of treasury stock						(2,839)	(2,839)
Purchase of treasury stock (in shares)						42	0
Issuance of treasury Stock		(4,953)				4,953	0
Issuance of treasury stock (in shares)	(197)					(197)	0
Issuance of restricted stock awards (in shares)	337						0
Forfeiture of restricted stock awards (in shares)	(2)						0
Exercise of stock options		89					89
Exercise of stock options (in shares)	6
Stock-based compensation		2,352	638				2,990
Dividend payable to stockholders					(9,063)		(9,063)
Dividend paid to stockholders					(9,060)		(9,060)
Change in fair value of interest rate swaps, net of tax				(1,355)			(1,355)
Amortization of prior service costs on defined benefit plan, net of tax				12			12
Net income					34,209		34,209
Translation adjustment to record merger of subsidiaries and correction to translation of Property and Equipment, net				(8,881)			(8,881)
Translation adjustment				(689)			(689)
Comprehensive income							23,296
Balance at Feb. 29, 2012	$ 3	$ 381,037	$ 5,880	$ (33,828)	$ 44,324	$ (16,165)	$ 381,251
Balance (in shares) at Feb. 29, 2012	30,840					641