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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amount and Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Foreign currency exchange contracts | Maximum
Derivative Instruments and Hedging Activities
Term of derivative instrument	3 months
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 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	$ 902
Fair Value, Assets	17	13
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 SGD/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets		8,341
Fair Value, Assets		30
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay GBP
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	38,406	40,648
Fair Value, Liabilities	(695)	(323)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay AUD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	12,819	15,124
Fair Value, Liabilities	(172)	(105)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay RUB
Derivative Instruments and Hedging Activities
Notional amount, Assets	12,777
Fair Value, Assets	(55)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay NZD
Derivative Instruments and Hedging Activities
Notional amount, Assets	3,071
Notional amount, Liabilities		2,952
Fair Value, Assets	(33)
Fair Value, Liabilities		(4)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay ZAR
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	3,349	8,618
Fair Value, Liabilities	(32)	(68)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay COP
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	3,793	2,931
Fair Value, Liabilities	(18)	(33)
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 USD/pay EUR
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		6,894
Fair Value, Liabilities		$ (2)

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
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-Topic 210
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- Definition

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