INCOME TAXES (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands		12 Months Ended
		Aug. 31, 2019	Aug. 31, 2018		Aug. 31, 2017
INCOME TAXES [Abstract]
Balance at beginning of fiscal year		$ 7,005	$ 7,694		$ 7,754
Gross increase - tax positions in prior period		530	1,600	[1]
Gross decrease - tax positions in prior period	[2]		(2,526)
Additions based on tax positions related to the current year		94	258		36
Settlements					(65)
Expirations of the statute of limitations for the assessment of taxes		(1,139)	(21)		(31)
Balance at end of fiscal year		$ 6,490	$ 7,005		$ 7,694

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

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