Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Value of Derivative Instruments and Classification on the Balance Sheet (Details)

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Value of Derivative Instruments and Classification on the Balance Sheet (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Derivative [Line Items]    
Derivatives Asset $ 75 $ 0
Derivative Liabilities 0 (70)
Sell AUD/Buy USD Fwd Contract    
Derivative [Line Items]    
Derivatives Asset 2 0
Derivative Liabilities 0 (9)
Sell CAD/Buy USD Fwd Contract    
Derivative [Line Items]    
Derivatives Asset 73 0
Derivative Liabilities $ 0 $ (61)