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Debt (Descriptors) (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2013
Apr. 30, 2014
Dec. 31, 2014
Debt Instrument [Line Items]        
Debt interest rate     4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage  
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%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= joe_DefeasedDebtMember		     5.62%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= joe_DefeasedDebtMember
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%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_LongtermDebtTypeAxis
= joe_CommunityDevelopmentDistrictDebtMember		 2.25%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		    
Construction loan in the Pier Park North joint venture, due February 2016, bearing interest at LIBOR plus 210 basis points, or 2.27% and 2.26% at March 31, 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%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= joe_PierParkNorthJointVentureConstructionLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConstructionLoansMember		      
Debt instrument, effective interest rate 2.27%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= joe_PierParkNorthJointVentureConstructionLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConstructionLoansMember		     2.26%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= joe_PierParkNorthJointVentureConstructionLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConstructionLoansMember