Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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The effective interest rate at the end of the reporting period.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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LONG-TERM DEBT (Details) - USD ($) $ in Thousands				3 Months Ended
LONG-TERM DEBT (Details) - USD ($) $ in Thousands	Mar. 15, 2018	May 24, 2017	Sep. 12, 2014	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Continuum
Debt Instrument [Line Items]
Maturity date	Mar. 31, 2029
Long-term debt	$ 3,448
Contractual interest rate	8.00%
Repayments of debt				$ 3,448
Revolving Credit Facility \| 2014 Credit Facility \| LIBOR
Debt Instrument [Line Items]
Variable interest rate spread			1.00%
Revolving Credit Facility \| 2014 Credit Facility \| Overnight Bank Funding Rate
Debt Instrument [Line Items]
Variable interest rate spread			0.50%
Revolving Credit Facility \| 2014 Credit Facility \| U.S. Dollars
Debt Instrument [Line Items]
Line of credit, current borrowing capacity			$ 100,000
Line of credit, maximum borrowing capacity			200,000
Revolving Credit Facility \| 2014 Credit Facility \| Other currencies, excluding U.S. dollars
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity			$ 50,000
Revolving Credit Facility \| 2017 Credit Facility
Debt Instrument [Line Items]
Maturity date		May 24, 2022
Revolving Credit Facility \| 2017 Credit Facility \| LIBOR
Debt Instrument [Line Items]
Variable interest rate spread		1.00%
Revolving Credit Facility \| 2017 Credit Facility \| Overnight Bank Funding Rate
Debt Instrument [Line Items]
Variable interest rate spread		0.50%
Revolving Credit Facility \| 2017 Credit Facility \| U.S. Dollars
Debt Instrument [Line Items]
Line of credit, current borrowing capacity		$ 300,000
Line of credit, maximum borrowing capacity		400,000
Outstanding debt					$ 25,000	$ 25,000
Interest rate					2.80%	3.50%
Available borrowing capacity					$ 274,697	$ 274,618
Revolving Credit Facility \| 2017 Credit Facility \| U.S. Dollars \| Maximum
Debt Instrument [Line Items]
Line of credit, current borrowing capacity					300,000	300,000
Revolving Credit Facility \| 2017 Credit Facility \| Other currencies, excluding U.S. dollars
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity		$ 100,000
Standby Letters of Credit \| 2017 Credit Facility
Debt Instrument [Line Items]
Irrevocable standby letters of credit					$ 303	$ 382