Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Long-term Assets (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Long-term Assets (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Property
Dec. 31, 2017
USD ($)
Long-term Assets [Abstract]    
Number of held-for-sale properties determined to be impaired | Property 1  
Impairment charge applied on other assets held for sale $ 234 $ 0
Impairment of long term assets   $ 0