Area of land sold in the reporting period.

No definition available.

Name:	cto_LandSalesAreaOfLand
Namespace Prefix:	cto_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Revenue from the sale of land per area unit of land in the reporting period.

+ References

No definition available.

+ Details

Name:	cto_LandSalesPerAreaOfLand
Namespace Prefix:	cto_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the recognition of additional revenue during the period for retail land sales which occurred in a prior period upon certain milestones being achieved.

+ References

No definition available.

+ Details

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

- Definition

Revenue per acre.

+ References

No definition available.

+ Details

Name:	cto_RevenuePerAcre
Namespace Prefix:	cto_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainLossOnSaleOfProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenue from the sale of land in the reporting period.

+ References

+ Details

Name:	us-gaap_LandSales
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

Name:	us-gaap_RealEstateLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Repayment received or receivable for expenses incurred on behalf of a client or customer, other than those reimbursements received by landlords from tenants.

+ 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 45
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=68075638&loc=d3e60722-111653

+ Details

Name:	us-gaap_ReimbursementRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

Name:	us-gaap_RetailLandSalesImprovementRevenuePriorSales
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=cto_CommercialRealEstateAndRetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=cto_UndevelopedLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_NorthAmericanDevelopmentGroupParcelB1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_NorthAmericanDevelopmentGroupOutParcelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_MintoCommunitiesLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_MintoSalesCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TransactionTypeAxis=cto_LandSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_DistributionCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TransactionTypeAxis=cto_LandSaleInfrastructureReimbursementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_NorthAmericanDevelopmentGroupThirdParcelMember
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LAND AND SUBSURFACE INTERESTS - Land Sales and Impairments (Details)										3 Months Ended					9 Months Ended
	Jun. 27, 2017 USD ($) a $ / a	Apr. 25, 2017 USD ($) a $ / a	Apr. 13, 2017 USD ($) a $ / a	Apr. 05, 2017 USD ($) a $ / a	Mar. 22, 2017 USD ($) a $ / a	Feb. 10, 2017 USD ($) a $ / a	Sep. 27, 2016 USD ($) a $ / a	Mar. 30, 2016 USD ($) a $ / a	Feb. 12, 2016 USD ($) a $ / a	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($) a $ / a	Mar. 31, 2017 USD ($) a $ / a	Sep. 30, 2016 USD ($) a $ / a	Mar. 31, 2016 USD ($) a $ / a	Sep. 30, 2017 USD ($) a $ / a	Sep. 30, 2016 USD ($) a $ / a
Land and Subsurface Interests
No. of Acres \| a											81.43	1,587.35	4.5	7.5	1,668.78	12.0
Gross Sales Price										$ 0	$ 10,858,000	$ 28,707,000			$ 39,565,000
Price per Acre \| $ / a											133,000	18,000			24,000
Gross Sales Price										$ 12,380,602			$ 12,210,945		$ 73,931,669	$ 43,439,318
Impairment charges																2,180,730
Commercial
Land and Subsurface Interests
No. of Acres \| a		30.00	4.50	27.50	6.35
Gross Sales Price		$ 2,938,000	$ 1,235,000	$ 3,218,000	$ 1,556,000
Price per Acre \| $ / a		98,000	274,000	117,000	245,000
Commercial/Retail Site
Land and Subsurface Interests
No. of Acres \| a									3.1
Undeveloped Land
Land and Subsurface Interests
Impairment charges															0	1,000,000
NADG - Parcel B-I (FPII)
Land and Subsurface Interests
No. of Acres \| a	19.43
Gross Sales Price	$ 3,467,000
Price per Acre \| $ / a	178,000
NADG - Out Parcel
Land and Subsurface Interests
No. of Acres \| a								4.4
Tomoka Town Center - Percentage of Completion Revenue																2,000,000
Minto Communities LLC
Land and Subsurface Interests
No. of Acres \| a						1,581.00
Gross Sales Price						$ 27,151,000
Price per Acre \| $ / a						17,000
Minto Sales Center
Land and Subsurface Interests
No. of Acres \| a							4.5
Land Sales
Land and Subsurface Interests
Gross Sales Price													$ 205,000	$ 2,190,000		$ 2,395,000
Price per Acre \| $ / a													46,000	292,000		200,000
Gain on Sale	$ 1,449,000										$ 6,858,000	$ 20,052,000	$ 126,000		$ 26,910,000	$ 1,575,000
Land Sales \| Commercial
Land and Subsurface Interests
Gain on Sale		$ 627,000	$ 13,000	$ 2,955,000	$ 11,000
Land Sales \| Commercial/Retail Site
Land and Subsurface Interests
Gross Sales Price									$ 190,000
Price per Acre \| $ / a									61,000
Gain on Sale									$ 145,000
Land Sales \| NADG - Parcel B-I (FPII)
Land and Subsurface Interests
Gain on Sale	3,263,000
Land Sales \| NADG - Out Parcel
Land and Subsurface Interests
Gross Sales Price								$ 2,000,000
Price per Acre \| $ / a								455,000
Gain on Sale								$ 1,304,000
Land Sales \| Minto Communities LLC
Land and Subsurface Interests
Gain on Sale						$ 20,041,000
Land Sales \| Minto Sales Center
Land and Subsurface Interests
Gross Sales Price							$ 205,000
Price per Acre \| $ / a							46,000
Gain on Sale							$ 126,000
Land Sales \| Distribution Center
Land and Subsurface Interests
Incentives received and earned													$ 113,000
Infrastructure reimbursement \| NADG - Third Parcel
Land and Subsurface Interests
Reimbursement received	$ 955,000