LAND AND SUBSURFACE INTERESTS - Real Estate Operations Revenues (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Land and Subsurface Interests
Land Sales Revenue	$ 0	$ 10,858,000	$ 28,707,000		$ 39,565,000
Total Revenues	12,380,602			$ 12,210,945	73,931,669	$ 43,439,318
Real Estate Operations
Land and Subsurface Interests
Land Sales Revenue				318,000	39,564,000	508,000
Tomoka Town Center - Percentage of Completion Revenue				3,654,000		16,456,000
Revenue from Reimbursement of Infrastructure Costs					1,276,000
Impact Fee and Mitigation Credit Sales	548,000			209,000	1,987,000	481,000
Subsurface Revenue	2,374,000			463,000	2,827,000	1,535,000
Fill Dirt and Other Revenue	4,000				4,000
Total Revenues	$ 2,926,406			$ 4,643,646	$ 45,658,221	$ 18,979,164

Aggregate of revenue from sale of fill dirt and other real estate revenue not otherwise specified in the taxonomy.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Represents the combined amount of revenue from the sale of impact fees and mitigation credits.

+ References

No definition available.

+ Details

Name:	cto_ImpactFeeAndMitigationCreditSales
Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate revenue from building and real estate development, which may include improvements (such as drainage, utilities, grading and subdividing) to a parcel of land, and general contracting services during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Revenue from the sale of land in the reporting period.

+ References

+ Details

Name:	us-gaap_LandSales
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Data Type:	xbrli:monetaryItemType
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

This element represents the recognition of revenue during the period for retail land sales which had been deferred due to such revenue being associated with the liability of the land developer (seller) as its obligation to complete improvements to land, which improvements were a component of the sales transaction. Such amount is generally recognized in revenue as the improvements are completed (percentage-of-completion).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 976
-SubTopic 605
-Section 55
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=82848596&loc=d3e24124-108672

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 976
-SubTopic 605
-Section 30
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68074414&loc=d3e23564-108670

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 976
-SubTopic 605
-Section 55
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=82848596&loc=d3e23992-108672

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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- Definition

Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights.

+ References

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- Details

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