DEBT (Summary of Changes in Long-Term Debt) (Details) - USD ($)		9 Months Ended
		May 31, 2020	Aug. 31, 2019
Debt Instrument [Line Items]
Current portion of long-term debt		$ 25,875,000
Long-term debt (net of current portion)		63,711,000
Total	[1]	89,586,000
Proceeds from long-term debt incurred during the period total		57,820,000
Regularly scheduled loan payments, Current		(1,539,000)
Regularly scheduled loan payments, Noncurrent		(6,003,000)
Regularly scheduled loan payments total		(7,542,000)
Refinances of short-term debt, Current		(11,046,000)
Refinances of short-term debt, Noncurrent		11,046,000
Refinances of short-term debt total
Reclassification of long-term debt, Current		3,402,000
Reclassification of long-term debt, Noncurrent		(3,402,000)
Reclassification of long-term debt total
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Current	[2]	92,000
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Noncurrent	[2]	(127,000)
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar total	[2]	(35,000)
Current portion of long-term debt		22,784,000
Long-term debt (net of current portion)		117,045,000
Total	[3]	139,829,000
Colombia Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Noncurrent		25,000,000
Proceeds from long-term debt incurred during the period total		25,000,000
Guatemala Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Noncurrent		20,820,000
Proceeds from long-term debt incurred during the period total		20,820,000
Trinidad Subsidiary [Member]
Debt Instrument [Line Items]
Proceeds from long-term debt incurred during the period, Current		6,000,000
Proceeds from long-term debt incurred during the period, Noncurrent		6,000,000
Proceeds from long-term debt incurred during the period total		12,000,000
Cash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		0	$ 0
NonCash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		$ 166,200,000	$ 111,300,000

[1] The carrying amount of non-cash assets assigned as collateral for these loans was $111.3 million. No cash assets were assigned as collateral for these loans.

[2] These foreign currency translation adjustments are recorded within Other comprehensive income.

[3] The carrying amount of non-cash assets assigned as collateral for these loans was $166.2 million. No cash assets were assigned as collateral for these loans.