INCOME TAXES (Significant Components of Deferred Tax Assets) (Details) - USD ($) $ in Thousands	Aug. 31, 2017	Aug. 31, 2016
Deferred tax assets:
U.S. net operating loss carryforward	$ 1,684	$ 3,226
Foreign tax credits	3,794	185
Deferred compensation	1,633	1,706
U.S. timing differences and alternative minimum tax credits	3,042	2,846
Foreign net operating losses	10,247	13,414
Gross deferred tax assets	37,822	37,713
U.S. deferred tax liabilities (depreciation and other timing	(3,646)	(3,944)
Foreign deferred tax liabilities netted against deferred tax assets	(4,744)	(8,848)
U.S. valuation allowance	(488)	(652)
Foreign valuation allowance	(13,532)	(12,011)
Net deferred tax assets	15,412	12,258
Accrued Expenses And Other Timing Differences [Member]
Deferred tax assets:
Foreign timing differences	3,871	3,807
Depreciaton And Amortization, Foreign Timing Differences [Member]
Deferred tax assets:
Foreign timing differences	9,514	8,923
Deferred Income Foreign Timing Differences [Member]
Deferred tax assets:
Foreign timing differences	$ 4,037	$ 3,606