CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Tax benefit from stock-based compensation [Member]	Accumulated other comprehensive loss [Member]	Retained Earnings (Accumulated deficit) [Member]	Treasury Stock [Member]
Balance at Aug. 31, 2013	$ 481,049	$ 3	$ 390,581	$ 8,016	$ (41,475)	$ 143,871	$ (19,947)
Balance (in shares) at Aug. 31, 2013		30,924,000					690,000
Issuance of treasury stock (in shares)	0
Forfeiture of restricted stock awards (in shares)		(1,000)
Stock-based compensation	1,430		1,430	0
Net income	21,432					21,432
Other Comprehensive Income (Loss)	1,149				1,149
Balance at Nov. 30, 2013	505,060	3	392,011	8,016	(40,326)	165,303	(19,947)
Balance (in shares) at Nov. 30, 2013		30,923,000					690,000
Balance at Aug. 31, 2014	548,265	3	397,150	9,505	(49,286)	215,613	(24,720)
Balance (in shares) at Aug. 31, 2014		30,951,000					741,000
Issuance of treasury stock (in shares)	0
Stock-based compensation	1,556		1,556	0
Net income	20,647					20,647
Other Comprehensive Income (Loss)	(9,419)				(9,419)
Balance at Nov. 30, 2014	$ 561,049	$ 3	$ 398,706	$ 9,505	$ (58,705)	$ 236,260	$ (24,720)
Balance (in shares) at Nov. 30, 2014		30,951,000					741,000