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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amount and Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Foreign currency exchange contracts | Maximum
Derivative Instruments and Hedging Activities
Term of derivative instrument	1 month
Not designated as hedging instruments | Accounts receivable, net | Receive RSD/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets		$ 9,018
Fair Value, Assets		59
Not designated as hedging instruments | Accounts receivable, net | Receive NOK/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets		2,122
Fair Value, Assets		17
Not designated as hedging instruments | Accounts receivable, net | Receive USD/pay SGD
Derivative Instruments and Hedging Activities
Notional amount, Assets		1,555
Fair Value, Assets		7
Not designated as hedging instruments | Accounts receivable, net | Receive USD/pay COP
Derivative Instruments and Hedging Activities
Notional amount, Assets	$ 3,977
Fair Value, Assets	3
Not designated as hedging instruments | Accounts receivable, net | Receive USD/pay ZAR
Derivative Instruments and Hedging Activities
Notional amount, Assets	988
Fair Value, Assets	7
Not designated as hedging instruments | Accounts receivable, net | Receive USD/pay DKK
Derivative Instruments and Hedging Activities
Notional amount, Assets	499
Fair Value, Assets	1
Not designated as hedging instruments | Accounts receivable, net | Receive SGD/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets	2,793
Fair Value, Assets	5
Not designated as hedging instruments | Accounts receivable, net | Receive EUR/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets		26,731
Fair Value, Assets		246
Not designated as hedging instruments | Accounts receivable, net | Receive USD/pay RUB
Derivative Instruments and Hedging Activities
Notional amount, Assets	8,914
Fair Value, Assets	181
Not designated as hedging instruments | Accrued liabilities | Receive RSD/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	9,097
Fair Value, Liabilities	(36)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay GBP
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	32,250	38,406
Fair Value, Liabilities	(75)	(695)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay AUD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	9,850	12,819
Fair Value, Liabilities	(15)	(172)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay NZD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	2,766	3,071
Fair Value, Liabilities	(6)	(33)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay COP
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		3,793
Fair Value, Liabilities		(18)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay ZAR
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		3,349
Fair Value, Liabilities		(32)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay DKK
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		1,283
Fair Value, Liabilities		(11)
Not designated as hedging instruments | Accrued liabilities | Receive EUR/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	44,286
Fair Value, Liabilities	$ (10)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay RUB
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		12,777
Fair Value, Liabilities		$ (55)

X

- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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+ References

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Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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