Impact fee and mitigation credits.

No definition available.

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

- Definition

Represents the balance of impact fee credits, as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

The increase (decrease) in impact fee credits during the reporting period.

+ References

No definition available.

+ Details

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

- Definition

Represents the balance of mitigation credits as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Future annual rental payments receivable under an operating lease.

+ References

No definition available.

+ Details

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

- Definition

Area of land held.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- 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=66902209&loc=d3e3602-108585

+ Details

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

- Definition

Carrying amount as of the balance sheet date, net of valuation allowances and impairment losses, of costs of land expected to be developed in the near term plus capitalized costs of development, for purposes of selling completed units to home buyers or commercial or industrial entities..

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4569655-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=68079674&loc=SL4616395-111683

+ Details

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

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the purchase of real estate held-for-investment and real estate joint ventures.

+ References

No definition available.

+ Details

Name:	us-gaap_PaymentsToAcquireRealEstateAndRealEstateJointVentures
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

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

- Details

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- Details

Name:	us-gaap_StatementGeographicalAxis=cto_DaytonaBeachFloridaMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_MajorPropertyClassAxis=us-gaap_LandAndLandImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorPropertyClassAxis=cto_RestaurantPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=cto_LandsharkBarGrillMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=cto_Cocina214RestaurantAndBarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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- Details

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- Details

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LAND AND SUBSURFACE INTERESTS - Beachfront Venture and Other Real Estate Assets (Details) ft² in Millions		1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 17, 2016 USD ($)	Apr. 30, 2017 USD ($) tenant	Mar. 31, 2017 USD ($) ft² a	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) a	Dec. 31, 2016 USD ($) a	Nov. 16, 2016
Land and subsurface interests
Impairment Charges				$ 209,908
Land and entitlement costs			$ 44,443,943			$ 51,955,278
Area of real estate property \| ft²			1.8
Impact Fee Credits			$ 709,000			925,000
Mitigation Credits			1,400,000	1,400,000
Impact Fee and Mitigation Credits, balance			2,106,314			$ 2,322,906
Cash received for impact fee credits			$ 217,000	$ 105,000
Minimum
Land and subsurface interests
Acres \| a			8,200
Daytona Beach, Florida
Land and subsurface interests
Acres \| a			8,200
Daytona Beach, Florida \| Land and land improvements
Land and subsurface interests
Area of real estate property \| ft²			1.2
Daytona Beach, Florida \| Restaurant property
Land and subsurface interests
Number of real estate properties \| tenant		2
Daytona Beach, Florida \| Restaurant property \| LandShark Bar Grill
Land and subsurface interests
Lease term			15 years
Area of real estate property \| a			6,264
Daytona Beach, Florida \| Restaurant property \| Cocina 214 Restaurant and Bar
Land and subsurface interests
Lease term		15 years
Annual minimum rent per year		$ 360,000
Vacant beachfront property \| Daytona Beach, Florida
Land and subsurface interests
Acres \| a			6			6
Land and entitlement costs			$ 11,700,000
Real estate venture
Land and subsurface interests
Unaffiliated third party’s percentage ownership							50.00%
Acquisition of noncontrolling interest and (discount on acquisition)	$ 4,800,000
Real estate venture \| Retained Earnings
Land and subsurface interests
Acquisition of noncontrolling interest and (discount on acquisition)	$ (879,000,000)
Real estate venture \| Vacant beachfront property \| Daytona Beach, Florida
Land and subsurface interests
Cash paid to acquire real estate					$ 5,700,000
Real estate venture \| Vacant beachfront property \| Daytona Beach, Florida
Land and subsurface interests
Acres \| a					6
Cash paid to acquire real estate					$ 11,300,000