Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)
3 Months Ended 6 Months Ended
Oct. 16, 2020
USD ($)
Mar. 07, 2018
property
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
property
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
New Accounting Pronouncements or Change in Accounting Principle            
Proceeds from sale of property and equipment       $ 0 $ 73,000  
Ownership in equity investment (as percent)       22.00%    
Other-than-temporary impairment charge     $ 24,700,000      
Other investments       $ 0   $ 0
Deposit refundable period (in years)       30 years    
Allowance for doubtful accounts       $ 800,000   $ 900,000
Weighted average life (in years)       7 years    
Entertainment Golf            
New Accounting Pronouncements or Change in Accounting Principle            
Number of properties (property) | property       4    
Golf Properties | Held-for-sale            
New Accounting Pronouncements or Change in Accounting Principle            
Number of properties held for sale | property   26        
Golf Properties | Disposed of by sale            
New Accounting Pronouncements or Change in Accounting Principle            
Sale price on sale of property $ 34,500,000          
Proceeds from sale of property and equipment $ 33,600,000