LAND AND SUBSURFACE INTERESTS - Tiger Bay Mitigation (Details)						3 Months Ended						6 Months Ended		9 Months Ended
	Nov. 01, 2018	Oct. 26, 2018 a	Aug. 01, 2018 a	Jun. 12, 2018 a	Jun. 27, 2017 USD ($) a	Sep. 30, 2018 USD ($) a	Jun. 30, 2018 USD ($) a instrument	Mar. 31, 2018 a	Sep. 30, 2017 a	Jun. 30, 2017 a	Mar. 31, 2017 a	Jun. 30, 2018 USD ($) instrument	Jun. 30, 2017 a	Sep. 30, 2018 USD ($) a	Sep. 30, 2017 a	Aug. 06, 2018 item	Jun. 08, 2018 item
Real Estate [Line Items]
Land sale acres | a		3,503	3,500
Investment in Joint Venture						$ 6,738,537								$ 6,738,537
Number of state credits awarded | item																88.84
Area of land sales as a percentage of land holdings	64.00%		64.00%
Maximum
Real Estate [Line Items]
Number of state credits awarded | item																	355
Land Sales
Real Estate [Line Items]
Land sale acres | a						24.1	32.4	34.9	0	81.4	1,587.4		1,668.8	91.4	1,668.8
Land Sales | Mitigation Bank West of Interstate Ninety Five
Real Estate [Line Items]
Land sales, ownership interest sold (as a percent)				70.00%								70.00%
Land sales, non-controlling interest (as a percent)							30.00%					30.00%
Land sale acres | a				2,492
Land Sales | Third Nadg Land Sale
Real Estate [Line Items]
Land sale acres | a					19.4
Payment made for infrastructure reimbursement					$ 955,000
Consolidated Tomoka Land Co
Real Estate [Line Items]
Land sales, non-controlling interest (as a percent)				30.00%
Interest in the joint venture (as a percent)												30.00%
Investment in Joint Venture							$ 6,700,000					$ 6,700,000
Mitigation Bank
Real Estate [Line Items]
Mitigation credits, Operating Agreement, credit sales, Minimum Sales Requirement, minimum revenue, net of commissions							$ 6,000,000					$ 6,000,000
Mitigation credits, Operating Agreement, credit sales, Minimum Sales Requirement, maximum credits, number | instrument							60					60
Mitigation credits, Operating Agreement, credit sales, Minimum Sales Guarantee, fair value							$ 100,000					$ 100,000
Mitigation credits, Put Right, maximum credits the Company must purchase, per quarter, number | instrument							8.536					8.536
Mitigation credits, Put Right, maximum credits the Company must purchase, per quarter, price to fair value (as a percent)							60.00%					60.00%
Mitigation credits, Put Right, third-party credit sales, reduction in Put Rights outstanding if sales price equals or exceeds price stipulated by Put Right, ratio							1					1
Mitigation credits, Put Right, maximum potential future payments							$ 27,000,000					$ 27,000,000
Mitigation credits, Put Right, fair value							$ 200,000					$ 200,000
Black Rock
Real Estate [Line Items]
Sale of interest in joint venture				70.00%