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DEBT (Narrative) (Details) |  | 1 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2017 USD ($) item | Mar. 31, 2018 USD ($) | Feb. 28, 2018 USD ($) | Jan. 31, 2017 USD ($) | May 31, 2018 USD ($) | May 31, 2017 USD ($) | Jan. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Aug. 31, 2017 USD ($) | Aug. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  | $ 105,852,000 | [1] |  |  |  |  | $ 106,297,000 | [2] |
Repayment of short-term bank borrowings |  |  |  |  | 81,758,000 |  | $ 17,179,000 |  |  |  |  |  |
Remaining outstanding balance |  |  |  |  | 69,806,000 |  |  |  |  |  | 68,034,000 |  |
Debt With Covenants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, Current |  |  |  |  | 40,000,000 |  |  |  |  |  | 40,000,000 |  |
Group of Subsidiaries [Member] | Debt With Covenants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  |  |  | 96,100,000 |  |  |  |  |  | 85,600,000 |  |
Trinidad Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining outstanding balance |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |
Miami-Dade County, Florida [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | $ 46,000,000 |  |  |  |  |  |  |  |  |
Union Bank [Member] | Miami-Dade County, Florida [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt term |  |  |  |  | 10 years |  |  |  |  |  |  |  |
Credit facility funded |  |  |  | 35,700,000 |  |  |  |  |  |  |  |  |
Credit facility, expiration date |  |  |  |  | Dec. 31, 2027 |  |  |  |  |  |  |  |
Citibank [Member] | Trinidad Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, Current |  | $ 1,500,000 |  |  |  |  |  |  | $ 1,500,000 | $ 3,000,000 |  |  |
LIBOR measurement period | 90 days |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, variable interest rate | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 12,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Number of payments | item | 8 |  |  |  |  |  |  |  |  |  |  |  |
Repayment of short-term bank borrowings |  |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |
Citibank [Member] | Honduras Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from notional amount |  |  | $ 5,600,000 |  |  |  |  |  |  |  |  |  |
Scotiabank [Member] | Panama Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, Current |  |  |  |  |  |  |  |  |  |  | $ 13,300,000 |  |
Debt term |  | 5 years |  |  |  |  |  |  |  |  |  |  |
LIBOR measurement period |  | 90 days |  |  |  |  |  |  |  |  |  |  |
Derivative, variable interest rate |  | 3.00% |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 15,000,000 |  |  |  |  |  |  |  |  |  |  |
Scotiabank [Member] | Honduras Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit, Current |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Union Bank [Member] | Miami-Dade County, Florida [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
LIBOR measurement period |  |  |  |  | 30 days |  |  |  |  |  |  |  |
Credit facility, variable interest rate |  |  |  |  | 1.70% |  |  |  |  |  |  |  |
Interest Rate Contract [Member] | Union Bank [Member] | Miami-Dade County, Florida [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  | $ 35,700,000 |  |  |  |  |  |  |  |  |
Derivative, fixed interest rate |  |  |  |  | 3.65% |  |  |  |  |  |  |  |
Derivative, effective date |  |  |  |  | Mar. 01, 2017 |  |  |  |  |  |  |  |
Derivative, maturity date |  |  |  |  | Mar. 01, 2027 |  |  |  |  |  |  |  |
Interest Rate Contract [Member] | London Interbank Offered Rate (LIBOR) [Member] | Union Bank [Member] | Miami-Dade County, Florida [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
LIBOR measurement period |  |  |  |  | 30 days |  |  |  |  |  |  |  |
Derivative, variable interest rate |  |  |  |  | 1.70% |  |  |  |  |  |  |  |
Cross Currency Interest Rate Swaps [Member] | Citibank [Member] | Honduras Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, fixed interest rate |  |  | 9.75% |  |  |  |  |  |  |  |  |  |
Honduras $13.5M Cross Currency Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
LIBOR measurement period |  |  | 90 days |  |  |  |  |  |  |  |  |  |
Cash Flow Hedging [Member] | Citibank [Member] | Honduras Subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining outstanding balance |  |  | $ 7,900,000 |  |  |  |  |  |  |  |  |  |
Cash Flow Hedging [Member] | Honduras $13.5M Cross Currency Interest Rate Swap [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 13,500,000 |  |  |  |  |  |  |  | $ 13,500,000
Derivative, variable interest rate |  |  | 3.00% |  | 3.00% |  |  |  |  |  |  |  |
Derivative, fixed interest rate |  |  |  |  | 9.75% |  |  |  |  |  |  |  |
[1] | The carrying amount of non-cash assets assigned as collateral for these loans was $129.5 million. No cash assets were assigned as collateral for these loans.
[2] | The carrying amount of non-cash assets assigned as collateral for these loans was $128.4 million. No cash assets were assigned as collateral for these loans.

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