Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)

v3.8.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)
 12 Months Ended
Dec. 31, 2017
USD ($)
derivative_instrument
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jan. 01, 2018
USD ($)
Derivative [Line Items]        
Consolidation percentage (as percent) 50.00%      
Other investments $ 21,135,000 $ 19,256,000    
Refundable term for initiation fees 30 years      
Expected life of active golf membership 7 years      
Ownership in equity investment (as percent) 22.00%      
Other than temporary impairment $ 0 2,900,000 $ 7,500,000  
Allowances for doubtful accounts 800,000 1,100,000    
Increase (decrease) in allowance for doubtful accounts (300,000) 100,000    
Restricted cash $ 6,000,000 6,400,000    
Not designated as hedging instrument | Interest rate cap        
Derivative [Line Items]        
Number of instruments held | derivative_instrument 1      
Lower Range        
Derivative [Line Items]        
Operating lease term 10 years      
Upper Range        
Derivative [Line Items]        
Operating lease term 20 years      
Membership base        
Derivative [Line Items]        
Amortization period 7 years      
Real Estate Investment with a Non-Controlling Interest        
Derivative [Line Items]        
Other investments $ 0      
Other Assets        
Derivative [Line Items]        
Derivative assets $ 300,000 $ 500,000    
Retained Earnings | Accounting Standards Update 2014-09 | Subsequent Event        
Derivative [Line Items]        
Cumulative effect of adoption of accounting principle       $ 5,000,000