DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amount and Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Foreign currency exchange contracts | Maximum
Derivative Instruments and Hedging Activities
Term of derivative instrument	1 month
Not designated as hedging instruments | Receive CAD/pay USD | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets		$ 4,892
Fair Value, Assets		61
Not designated as hedging instruments | Receive SGD/pay USD | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets		223
Fair Value, Assets		2
Not designated as hedging instruments | Receive SGD/pay USD | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	$ 3,296
Fair Value, Liabilities	(15)
Not designated as hedging instruments | Receive NOK/pay USD | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets	1,746	1,534
Fair Value, Assets	4	18
Not designated as hedging instruments | Receive USD/pay BRL | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets		1,806
Fair Value, Assets		1
Not designated as hedging instruments | Receive USD/pay BRL | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	717
Fair Value, Liabilities	(8)
Not designated as hedging instruments | Receive USD/pay CLP | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	2,545	1,112
Fair Value, Liabilities	(3)	(8)
Not designated as hedging instruments | Receive USD/pay COP | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets		2,803
Fair Value, Assets		13
Not designated as hedging instruments | Receive USD/pay COP | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	3,286
Fair Value, Liabilities	(3)
Not designated as hedging instruments | Receive USD/pay GBP | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets	33,290
Fair Value, Assets	139
Not designated as hedging instruments | Receive USD/pay GBP | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		31,342
Fair Value, Liabilities		(334)
Not designated as hedging instruments | Receive USD/pay EUR | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	76,452	65,131
Fair Value, Liabilities	(85)	(642)
Not designated as hedging instruments | Receive USD/pay AUD | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	16,909	17,238
Fair Value, Liabilities	(73)	(177)
Not designated as hedging instruments | Receive USD/pay ZAR | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets	20,255
Fair Value, Assets	65
Not designated as hedging instruments | Receive USD/pay ZAR | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities		21,311
Fair Value, Liabilities		(222)
Not designated as hedging instruments | Receive USD/pay MXN | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	3,337	7,720
Fair Value, Liabilities	(29)	(126)
Not designated as hedging instruments | Receive USD/pay NZD | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	2,237	1,826
Fair Value, Liabilities	(4)	(18)
Not designated as hedging instruments | Receive USD/pay TRY | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	5,435	5,483
Fair Value, Liabilities	$ (83)	$ (52)