INCOME TAXES - Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits
Balance at beginning of fiscal year	$ 9,373,000	$ 11,212,000	$ 13,528,000
Additions based on tax positions related to the current year	964,000	349,000	575,000
Settlements	(1,093,000)	(191,000)	(591,000)
Expirations of the statute of limitations for the assessment of taxes	(458,000)	(1,997,000)	(2,300,000)
Balance at end of fiscal year	8,786,000	9,373,000	11,212,000
Deferred income taxes that could reduce unrecognized tax benefits	7,800,000
Unrecognized tax benefitt, net amount if recongized would favorably affect the effective tax rate	1,000,000
Expected change in unrecognized tax benefits reduction of taxes payable	644,000
Income tax interest and/or penalties accrued	$ 899,000	$ 800,000