REVENUE RECOGNITION - Timing of Revenue Recognition (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Over Lease Term	$ 9,948,000	$ 7,778,000	$ 19,336,000	$ 15,053,000
Commercial Loan Investment Related Revenue	274,000	553,000	575,000	1,090,000
Total Revenues	13,833,185	22,837,783	38,684,784	61,551,067
Asset/Good Transferred at a Point in Time
Revenues
Revenue from contract with customer, including assessed tax	3,324,000	13,485,000	18,199,000	43,914,000
Services Transferred Over Time
Revenues
Revenue from contract with customer, including assessed tax	287,000	1,022,000	575,000	1,494,000
Income Properties
Revenues
Over Lease Term	9,736,000	7,566,000	18,914,000	14,631,000
Total Revenues	9,781,299	7,565,007	18,987,026	14,638,247
Income Properties \| Services Transferred Over Time
Revenues
Revenue from contract with customer, including assessed tax	45,000	(1,000)	73,000	7,000
Commercial Loan Investments
Revenues
Commercial Loan Investment Related Revenue	274,000	553,000	575,000	1,090,000
Total Revenues	273,467	553,159	574,466	1,089,648
Real Estate Operations
Revenues
Over Lease Term	201,000	201,000	400,000	400,000
Total Revenues	2,484,314	13,257,355	16,463,644	42,731,815
Real Estate Operations \| Asset/Good Transferred at a Point in Time
Revenues
Revenue from contract with customer, including assessed tax	2,283,000	12,101,000	16,063,000	41,056,000
Real Estate Operations \| Services Transferred Over Time
Revenues
Revenue from contract with customer, including assessed tax		955,000		1,276,000
Golf Operations
Revenues
Revenue from contract with customer, including assessed tax	1,283,000	1,384,000	2,638,000	2,858,000
Total Revenues	1,282,918	1,383,513	2,637,274	2,858,457
Golf Operations \| Asset/Good Transferred at a Point in Time
Revenues
Revenue from contract with customer, including assessed tax	1,041,000	1,316,000	2,136,000	2,647,000
Golf Operations \| Services Transferred Over Time
Revenues
Revenue from contract with customer, including assessed tax	242,000	68,000	502,000	211,000
Agriculture and Other Income
Revenues
Revenue from contract with customer, including assessed tax		68,000		211,000
Over Lease Term	11,000	11,000	22,000	22,000
Total Revenues	$ 11,187	78,749	$ 22,374	232,900
Agriculture and Other Income \| Asset/Good Transferred at a Point in Time
Revenues
Revenue from contract with customer, including assessed tax		$ 68,000		$ 211,000

Interest and fee income related to commercial loans including industrial and agricultural, real estate (commercial and residential, construction and development), trade financing, and lease financing.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

+ Details

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

- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707

+ Details

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

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_TimingOfTransferOfGoodOrServiceAxis=us-gaap_TransferredAtPointInTimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TimingOfTransferOfGoodOrServiceAxis=us-gaap_TransferredOverTimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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