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FINANCIAL INSTRUMENTS AND FAIR VALUE (Narrative) (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2015
Nov. 30, 2013
Fair Value, Inputs, Level 2 | Other Assets        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair value of interest rate swaps $ 3,800,000      
Fair Value, Inputs, Level 2 | Other Liabilities        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair value of interest rate swaps (600,000)      
New Interest Rate Swap        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notional principal amount of derivative liability 79,800,000 $ 85,100,000 $ 100,000,000.0  
Notional principal amount of derivative liability, at maturity     $ 53,100,000  
Interest Rate Swap        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notional principal amount of derivative liability 52,700,000 56,500,000   $ 75,000,000.0
Notional principal amount of derivative liability, at maturity       $ 38,700,000
Fair value of interest rate swaps 3,800,000 $ (600,000)    
Interest rate swap, net loss amount expected to be reclassified in the next twelve months $ (900,000)