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DERIVATIVE FINANCIAL INSTRUMENTS (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Feb. 28, 2017
USD ($)
derivative
Oct. 31, 2013
USD ($)
derivative
Interest Rate Swaps              
Derivative financial instruments              
Number of derivative instruments | derivative           3 2
Notional amount of interest rate swap derivatives             $ 25,000
Notional amount of interest rate swap derivatives at maturity           $ 40,000 $ 6,673
Hedge ineffectiveness recorded in earnings $ 0 $ 0          
Estimated amount to be reclassified as an decrease to interest expense     $ (252)        
Derivatives in cash flow hedging relationships | Interest rate products              
Effect of derivative financial instruments on the condensed consolidated statement of income and comprehensive income              
Amount of gain (loss) recognized in OCI on derivative 121 (34) 936 $ (417)      
Amount of (gain) loss reclassified from accumulated OCI into income (effective portion) 16 79 52 239      
Derivatives designated as hedging instruments | Interest rate products              
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 623 $ 633 1,839 $ 1,797      
Derivatives designated as hedging instruments | Interest rate products | Other long-term assets              
Derivative financial instruments              
Fair value of derivative Asset $ 1,184   $ 1,184   $ 196