DEBT (Summary of Changes in Long-Term Debt) (Details) - USD ($)		6 Months Ended
		Feb. 29, 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		45,820,000
Regularly scheduled loan payments, Current		(1,268,000)
Regularly scheduled loan payments, Noncurrent		(4,040,000)
Regularly scheduled loan payments total		(5,308,000)
Reclassification of long-term debt, Current		(8,421,000)
Reclassification of long-term debt, Noncurrent		8,421,000
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]	61,000
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar, Noncurrent	[2]	(33,000)
Translation adjustments on foreign currency debt of subsidiaries whose functional currency is not the U.S. dollar total	[2]	28,000
Current portion of long-term debt		16,247,000
Long-term debt (net of current portion)		113,879,000
Total	[3]	130,126,000
Debt Instrument, Collateral amount		156,700,000
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
Cash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount		$ 0
NonCash Asset [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral amount			$ 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 $156.7 million. No cash assets were assigned as collateral for these loans.