DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Notional Amount and Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
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	$ 22,314
Fair Value, Assets	61	173
Not designated as hedging instruments | Receive SGD/pay USD | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets	223	7,915
Fair Value, Assets	2	24
Not designated as hedging instruments | Receive NOK/pay USD | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets	1,534	2,138
Fair Value, Assets	18	28
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		3,138
Fair Value, Liabilities		(3)
Not designated as hedging instruments | Receive USD/pay CLP | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets		4,094
Fair Value, Assets		9
Not designated as hedging instruments | Receive USD/pay CLP | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	1,112
Fair Value, Liabilities	(8)
Not designated as hedging instruments | Receive USD/pay COP | Accounts receivable, net
Derivative Instruments and Hedging Activities
Notional amount, Assets	2,803	2,330
Fair Value, Assets	13	2
Not designated as hedging instruments | Receive USD/pay GBP | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	31,342	7,718
Fair Value, Liabilities	(334)	(57)
Not designated as hedging instruments | Receive USD/pay EUR | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	65,131	29,621
Fair Value, Liabilities	(642)	(325)
Not designated as hedging instruments | Receive USD/pay AUD | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	17,238	15,135
Fair Value, Liabilities	(177)	(74)
Not designated as hedging instruments | Receive USD/pay ZAR | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	21,311	20,405
Fair Value, Liabilities	(222)	(296)
Not designated as hedging instruments | Receive USD/pay MXN | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	7,720	25,864
Fair Value, Liabilities	(126)	(4)
Not designated as hedging instruments | Receive USD/pay NZD | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	1,826	2,076
Fair Value, Liabilities	(18)	$ (5)
Not designated as hedging instruments | Receive USD/pay TRY | Accrued liabilities
Derivative Instruments and Hedging Activities
Notional amount, Liabilities	5,483
Fair Value, Liabilities	$ (52)