Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)

v3.10.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
derivative_instrument
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Accounting Policies [Abstract]        
Refundable term for initiation fees   30 years    
Expected life of active golf membership   7 years    
Period to recognize membership dues   12 months    
Derivative [Line Items]        
Return of margin deposits under repurchase agreements and derivatives   $ 0 $ 72,653  
Ownership in equity investment (as percent)   22.00%    
Other investments   $ 21,901   $ 21,135
Interest rate cap        
Derivative [Line Items]        
Interest rate derivative instruments not designated as hedging instruments at fair value, net   $ 600    
Interest rate cap | Non-hedge derivatives        
Derivative [Line Items]        
Number of interest rate derivatives held (in derivatives) | derivative_instrument   1    
Lower Range        
Derivative [Line Items]        
Operating lease term   10 years    
Upper Range        
Derivative [Line Items]        
Operating lease term   20 years    
Accounting Standards Update 2015-18        
Derivative [Line Items]        
Return of margin deposits under repurchase agreements and derivatives     1,100  
Reclassification Adjustment | Operating Expense        
Derivative [Line Items]        
Corporate overhead $ (3,800)   (7,800)  
Reclassification Adjustment | General and Administrative Expense        
Derivative [Line Items]        
Corporate overhead $ 3,800   $ 7,800