INCOME TAXES (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands		12 Months Ended
		Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
INCOME TAXES [Abstract]
Balance at beginning of fiscal year		$ 6,490	$ 7,005	$ 7,694
Gross increase - tax positions in prior period		464	530	1,600	[1]
Gross decrease - tax positions in prior period	[2]			(2,526)
Additions based on tax positions related to the current year		186	94	258
Expirations of the statute of limitations for the assessment of taxes		(2,567)	(1,139)	(21)
Balance at end of fiscal year		$ 4,573	$ 6,490	$ 7,005

[1] Aeropost related unrecognized tax benefits, with corresponding increase to Goodwill, due to prior year acquisition.

[2] Beneficial impact of US tax rate change, with corresponding detrimental rate change offset in deferred tax assets.