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DERIVATIVE FINANCIAL INSTRUMENTS (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Feb. 28, 2017
USD ($)
instrument
Interest expense        
Effect of derivative financial instruments on the condensed consolidated statement of income and comprehensive income        
Amount of (gain) loss reclassified from accumulated OCI into income (effective portion) $ (113) $ (6) $ 313  
Interest Rate Swaps        
Derivative financial instruments        
Number of derivative instruments | instrument       3
Notional amount of interest rate swap derivatives       $ 40,000
Estimated amount to be reclassified as an increase to interest expense 149      
Interest rate products | Derivatives in cash flow hedging relationships        
Effect of derivative financial instruments on the condensed consolidated statement of income and comprehensive income        
Amount of gain (loss) recognized in OCI on derivative (598) 244    
Interest rate products | Other long-term assets | Derivatives designated as hedging instruments        
Derivative financial instruments        
Fair value of derivative Asset   566    
Interest rate products | Other long-term liabilities | Derivatives designated as hedging instruments        
Derivative financial instruments        
Fair value of derivative liability 363      
Interest rate products | Interest expense | Derivatives designated as hedging instruments        
Effect of derivative financial instruments on the condensed consolidated statement of income and comprehensive income        
Total amounts of income and expense line items presented that reflect the effects of cash flow hedges recorded $ 5,134 $ 2,701 $ 2,474