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Debt (Descriptors) (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Apr. 30, 2014
Debt Instrument [Line Items]      
Debt interest rate     4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
In-substance defeased debt, interest payable monthly at 5.62% at December 31, 2014 and 2013, secured and paid by pledged treasury securities, due October 1, 2015      
Debt Instrument [Line Items]      
Debt interest rate 5.62%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= joe_DefeasedDebtMember		 5.62%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= joe_DefeasedDebtMember		  
Debt instrument, maturity date Oct. 01, 2015 Oct. 01, 2015  
Community Development District debt, secured by certain real estate and standby note purchase agreements, due May 2016 — May 2039, bearing interest at 2.55% to 7.0% at December 31, 2014 and 2013      
Debt Instrument [Line Items]      
Debt instrument, minimum interest 2.55%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_LongtermDebtTypeAxis
= joe_CommunityDevelopmentDistrictDebtMember		 2.55%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_LongtermDebtTypeAxis
= joe_CommunityDevelopmentDistrictDebtMember		  
Debt instrument, maximum interest 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_LongtermDebtTypeAxis
= joe_CommunityDevelopmentDistrictDebtMember		 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_LongtermDebtTypeAxis
= joe_CommunityDevelopmentDistrictDebtMember		  
Debt instrument, maturity start date May 01, 2016    
Debt instrument, maturity end date May 01, 2039    
Construction loan in the Pier Park North joint venture, due February 2016, bearing interest at LIBOR plus 210 basis points, or 2.26% and 2.27% at December 31, 2014 and 2013, respectively | Pier Park North Joint Venture Construction Loan      
Debt Instrument [Line Items]      
Debt interest rate 2.26%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= joe_PierParkNorthJointVentureConstructionLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConstructionLoansMember		 2.27%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= joe_PierParkNorthJointVentureConstructionLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConstructionLoansMember		  
Debt instrument, basis spread 2.10%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= joe_PierParkNorthJointVentureConstructionLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConstructionLoansMember