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DERIVATIVE FINANCIAL INSTRUMENTS (Cash flow hedges gains (losses) recognized) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Trading Activity, Gains and Losses, Net [Line Items]    
Effective Portion, Recognized in OCI, Amount of Gain (Loss) $ (1,505) $ 1,699
Interest rate swaps    
Trading Activity, Gains and Losses, Net [Line Items]    
Effective Portion, Recognized in OCI, Amount of Gain (Loss) (1,340) 1,896
Interest rate swaps | Interest expense    
Trading Activity, Gains and Losses, Net [Line Items]    
Effective Portion, Reclassified from AOCI into Income, Amount of Gain (Loss) (165) (197)
Interest rate swaps | Other income    
Trading Activity, Gains and Losses, Net [Line Items]    
Ineffective Portion, Recognized in Income on Derivatives, Amount of Gain (Loss) $ 0 $ 0