Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Instruments Classification Within Fair Value Hierarchy (Details)

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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Derivative Instruments Classification Within Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Assets      
Derivative Financial Instruments $ 122 $ 0  
Liabilities      
Derivative Financial Instruments (10) $ (70)  
Fair Value, Measurements, Recurring      
Assets      
Derivative Financial Instruments 122   $ 0
Liabilities      
Derivative Financial Instruments (10)   (77)
Fair Value, Measurements, Recurring | Level 1      
Assets      
Derivative Financial Instruments 0   0
Liabilities      
Derivative Financial Instruments 0   0
Fair Value, Measurements, Recurring | Level 2      
Assets      
Derivative Financial Instruments 122   0
Liabilities      
Derivative Financial Instruments (10)   (77)
Fair value of derivatives, net 122    
Obligation to return cash 122    
Fair Value, Measurements, Recurring | Level 3      
Assets      
Derivative Financial Instruments 0   0
Liabilities      
Derivative Financial Instruments $ 0   $ 0