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INCOME TAXES, Other Tax Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Partnership
Dec. 31, 2018
USD ($)
Partnership
Dec. 31, 2017
USD ($)
Other Tax Information [Abstract]      
Minimum percentages of tax position liable to be realized upon ultimate settlement 50.00%    
Liability for uncertain tax positions $ 0    
Unrecognized tax benefits $ 0    
Number of investments in partnerships | Partnership 4 4  
Investment amount in partnerships $ 325 $ 433  
Tax Credit Carryforward [Abstract]      
Investment tax credits 423    
Amortization of investments in other expenses $ 108 108 $ 159
Investment Tax Credit Carryforward [Member]      
Tax Credit Carryforward [Abstract]      
Tax credits recognition period 4 years    
Tax credits recognized as reduction of tax expense amount $ 141 $ 141 $ 141