COMPANY OVERVIEW AND BASIS OF PRESENTATION (Schedule of Error Corrections and Prior Period Adjustment) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings	$ 473,954	$ 420,866
Additional paid-in capital	$ 432,882	422,395
Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings		420,499
Additional paid-in capital		422,762
Reclassified [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Retained earnings		367
Additional paid-in capital		$ (367)