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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amount and Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
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 SGD/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets	$ 18,713
Fair Value, Assets	41
Not designated as hedging instruments | Accounts receivable, net | Receive RSD/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Assets	10,127	9,018
Fair Value, Assets	28	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 | Accrued liabilities | Receive EUR/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	1,298,899
Fair Value, Liabilities	(1,768)
Not designated as hedging instruments | Accrued liabilities | Receive NOK/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	4,411
Fair Value, Liabilities	(18)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay GBP
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	35,256	38,406
Fair Value, Liabilities	(416)	(695)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay RUB
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	7,780	12,777
Fair Value, Liabilities	(40)	(55)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay AUD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	8,508	12,819
Fair Value, Liabilities	(130)	(172)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay CNY
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	12,344
Fair Value, Liabilities	(50)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay COP
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	5,436	3,793
Fair Value, Liabilities	(93)	(18)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay ZAR
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	2,403	3,349
Fair Value, Liabilities	(106)	(32)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay DKK
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	3,151	1,283
Fair Value, Liabilities	(3)	(11)
Not designated as hedging instruments | Accrued liabilities | Receive USD/pay NZD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	2,290	3,071
Fair Value, Liabilities	(13)	$ (33)
Not designated as hedging instruments | Accrued liabilities | Receive SEK/pay USD
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	2,275
Fair Value, Liabilities	$ (10)

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
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