Area of land sold in the reporting period.

No definition available.

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Period Type:	duration

- Definition

Represents the area of land sold in the reporting period as a percentage of the total area of land holdings.

+ References

No definition available.

+ Details

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Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Land Sales, Gross Sales Price

+ References

No definition available.

+ Details

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

- Definition

Land Sales, Ownership Interest, Noncontrolling Interest, Percentage

+ References

No definition available.

+ Details

Name:	cto_LandSalesOwnershipInterestNoncontrollingInterestPercentage
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Land Sales, Ownership Interest Sold, Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Mitigation Credits, Operating Agreement, Credit Sales, Minimum Sales Guarantee, Fair Value

+ References

No definition available.

+ Details

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Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Mitigation Credits, Operating Agreement, Credit Sales, Minimum Sales Requirement, Maximum Credits, Number

+ References

No definition available.

+ Details

Name:	cto_MitigationCreditsOperatingAgreementCreditSalesMinimumSalesRequirementMaximumCreditsNumber
Namespace Prefix:	cto_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Mitigation Credits, Operating Agreement, Credit Sales, Minimum Sales Requirement, Minimum Revenue, Net of Commissions

+ References

No definition available.

+ Details

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Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Mitigation Credits, Put Right, Fair Value

+ References

No definition available.

+ Details

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Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Mitigation Credits, Put Right, Maximum Credits Entity Must Purchase, Per Quarter, Number

+ References

No definition available.

+ Details

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Namespace Prefix:	cto_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Mitigation Credits, Put Right, Maximum Credits Entity Must Purchase, Per Quarter, Price to Fair Value, Percentage

+ References

No definition available.

+ Details

Name:	cto_MitigationCreditsPutRightMaximumCreditsEntityMustPurchasePerQuarterPriceToFairValuePercentage
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Mitigation Credits, Put Right, Maximum Potential Future Payments

+ References

No definition available.

+ Details

Name:	cto_MitigationCreditsPutRightMaximumPotentialFuturePayments
Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	cto_MitigationCreditsPutRightThirdPartyCreditSalesReductionInPutRightsOutstandingIfSalesPriceEqualsOrExceedsPriceStipulatedByPutRightRatio
Namespace Prefix:	cto_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Ownership Interest in Joint Venture By Parent, Percentage

+ References

No definition available.

+ Details

Name:	cto_OwnershipInterestInJointVentureByParentPercentage
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale of Interest in Joint Venture, Percentage

+ References

No definition available.

+ Details

Name:	cto_SaleOfInterestInJointVenturePercentage
Namespace Prefix:	cto_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

State Credits Awarded, Number

+ References

No definition available.

+ Details

Name:	cto_StateCreditsAwardedNumber
Namespace Prefix:	cto_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

+ Details

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

- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- 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

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cto_ConsolidatedTomokaLandCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cto_MitigationBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cto_BlackRockMember
Namespace Prefix:
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LAND AND SUBSURFACE INTERESTS - Tiger Bay Mitigation (Details)			6 Months Ended	12 Months Ended
	Feb. 28, 2019 a	Jun. 12, 2018 a	Jun. 30, 2018 USD ($) instrument	Dec. 31, 2018 USD ($) a	Dec. 31, 2017 USD ($) a	Dec. 31, 2016 USD ($) a	Aug. 06, 2018 item	Jun. 08, 2018 item
Real Estate [Line Items]
Land sale acres \| a	1,800
Investment in Joint Venture				$ 6,788,034
Number of state credits awarded \| item							88.84
Area of land sales as a percentage of land holdings	33.00%
Maximum
Real Estate [Line Items]
Number of state credits awarded \| item								355
Land Sales
Real Estate [Line Items]
Land sale acres \| a				205.4	1,700.9	707.7
Gain on Sale				$ 32,596,000	$ 31,758,000	$ 8,304,000
Gross Sales Price				$ 43,719,000	$ 47,011,000	$ 13,759,000
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%
Land sale acres \| a		2,492
Gain on Sale				$ 18,400,000
Gross Sales Price				15,300,000
Consolidated Tomoka Land Co
Real Estate [Line Items]
Interest in the joint venture (as a percent)			30.00%
Investment in Joint Venture				$ 6,800,000
Mitigation Bank
Real Estate [Line Items]
Mitigation credits, Operating Agreement, credit sales, Minimum Sales Requirement, minimum revenue, net of commissions			$ 6,000,000
Mitigation credits, Operating Agreement, credit sales, Minimum Sales Requirement, maximum credits, number \| instrument			60
Mitigation credits, Operating Agreement, credit sales, Minimum Sales Guarantee, fair value			$ 100,000
Mitigation credits, Put Right, maximum credits the Company must purchase, per quarter, number \| instrument			8.536
Mitigation credits, Put Right, maximum credits the Company must purchase, per quarter, price to fair value (as a percent)			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
Mitigation credits, Put Right, maximum potential future payments			$ 27,000,000
Mitigation credits, Put Right, fair value			$ 200,000
Black Rock
Real Estate [Line Items]
Sale of interest in joint venture		70.00%