CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)	9 Months Ended
	Sep. 30, 2018 USD ($) $ / item	Sep. 30, 2017 USD ($)
Supplemental Disclosure of Cash Flows:
Income taxes refunded	$ 8,000	$ 531,000
Interest paid	6,989,000	6,026,000
Interest capitalized	0	124,000
Accrued and Other Liabilities	(4,194,651)	(1,984,999)
Land and Development Costs	$ 3,090,301	11,204,943
Supplemental disclosure of investing and financing activities
Annual surcharge, per round of golf played | $ / item	1
Minimum annual per round surcharge	$ 70,000
Maximum aggregate amount of per round surcharge	700,000
Contingent consideration on Golf Course Land Purchase reflected as an increase in increase in Golf Buildings, Improvements, and Equipment and also as an increase in Accrued and Other Liabilities	700,000
Aspen, Colorado
Supplemental disclosure of investing and financing activities
Tenant contribution	1,500,000
Florida
Supplemental disclosure of investing and financing activities
Tenant contribution	1,900,000
Surface land over subsurface interests
Supplemental Disclosure of Cash Flows:
Gain on Sale	435,000
Real Estate Operations
Supplemental disclosure of investing and financing activities
Purchase price		40,000,000
Single-tenant | Aspen, Colorado
Supplemental disclosure of investing and financing activities
Purchase price	28,000,000
Land Sales
Supplemental Disclosure of Cash Flows:
Gain on Sale	14,768,000	$ 26,910,000
Land Sales | Mitigation Bank West of Interstate Ninety Five
Supplemental Disclosure of Cash Flows:
Gain on Sale	18,400,000
Gain on Sale, noncash	5,100,000
Investment in Joint Venture	6,700,000
Accrued and Other Liabilities	300,000
Land and Development Costs	$ 1,300,000