Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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

- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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- 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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Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=joe_DefeasedDebtMember
Namespace Prefix:
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- Details

Name:	us-gaap_LongtermDebtTypeAxis=joe_CommunityDevelopmentDistrictDebtMember
Namespace Prefix:
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- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConstructionLoansMember
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- Details

Name:	us-gaap_DebtInstrumentAxis=joe_PierParkNorthJointVentureConstructionLoanMember
Namespace Prefix:
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Debt (Descriptors) (Details)	6 Months Ended	12 Months Ended
Debt (Descriptors) (Details)	Jun. 30, 2015	Dec. 31, 2013	Dec. 31, 2014	Apr. 30, 2014
Debt Instrument [Line Items]
Debt interest rate				4.75%
In-substance defeased debt, interest payable at 5.62%, secured and paid by pledged treasury securities, due October 1, 2015
Debt Instrument [Line Items]
Debt interest rate	5.62%		5.62%
Community Development District debt, secured by certain real estate and standby note purchase agreements, due through May 2039, interest payable at 2.25% to 7.0%
Debt Instrument [Line Items]
Debt instrument, minimum interest	2.25%	2.25%
Debt instrument, maximum interest	7.00%	7.00%
Construction loan in the Pier Park North joint venture, due February 2016, bearing interest at LIBOR plus 210 basis points, or 2.28% and 2.26% at June 30, 2015 and December 31, 2014, respectively \| Pier Park North Joint Venture Construction Loan
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.10%
Debt instrument, effective interest rate	2.28%		2.26%