Asset Impairment Charges, Prior Trigger Event.

No definition available.

Name:	cto_AssetImpairmentChargesPriorTriggerEvent
Namespace Prefix:	cto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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:	cto_ImpairmentOfLongLivedAssetsLineItems
Namespace Prefix:	cto_
Data Type:	xbrli:stringItemType
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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

+ Details

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

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

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

- Definition

After tax earnings per share or per unit impact arising from asset impairment.

+ References

No definition available.

+ Details

Name:	us-gaap_ImpairmentEffectOnEarningsPerShareAfterTax
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cto_GolfOperationsSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=cto_UndevelopedLandInDaytonaBeachFloridaAlongInterstate95Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

IMPAIRMENT OF LONG-LIVED ASSETS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Golf Operations And Club Assets [Member] \| Discontinued Operations, Held-for-sale
Impairment of Long-Lived Assets
Sales price		$ 3,450
Golf Operations
Impairment of Long-Lived Assets
Impairment Charges	$ 1,100
Impairment charge (in dollars per share)	$ 0.15
Total asset impairment			$ 3,100
Undeveloped Land in Daytona Beach, Florida, Along Interstate 95
Impairment of Long-Lived Assets
Impairment Charges		$ 0	$ 0