SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PROPERTY, PLANT, AND EQUIPMENT and GOLF OPERATIONS (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) item property	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
PROPERTY, PLANT, AND EQUIPMENT
Depreciation | $	$ 9,900	$ 10,300	$ 7,900
Interest capitalized | $	$ 0	$ 0	$ 215
Golf Operations
PROPERTY, PLANT, AND EQUIPMENT
Number of golf courses | property	2
Number of holes to the golf course | item	18
Number of holes to the golf course practice facility | item	3
Golf course and clubhouse facility membership period	12 months
Building and Building Improvements | Golf Operations | Minimum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	10 years
Building and Building Improvements | Golf Operations | Maximum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	43 years
Equipment | Golf Operations | Minimum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	3 years
Equipment | Golf Operations | Maximum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	10 years
Income Properties, Land, Buildings, and Improvements | Minimum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	5 years
Income Properties, Land, Buildings, and Improvements | Maximum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	55 years
Other Furnishings and Equipment | Minimum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	3 years
Other Furnishings and Equipment | Maximum
PROPERTY, PLANT, AND EQUIPMENT
Useful lives for property, plant, and equipment	20 years