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REVENUE (Narrative) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
method
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
method
Sep. 30, 2017
USD ($)
Revenue from Contract with Customer [Abstract]        
Number of sales categories | method 2   2  
Contract duration     1 year  
Retail estate sales, deposit required 5.00%   5.00%  
Contract balances, recognized during period | $ $ 355 $ 459 $ 8,685 $ 8,369