Nature of Operations - Real Estate Assets (Details)	Sep. 30, 2018
Nature of Operations
Percentage of real estate land holdings located within fifteen miles of Gulf of Mexico	90.00%

Percentage of real estate land holdings owned by entity located within fifteen miles of the Gulf of Mexico.

No definition available.

Name:	joe_RealEstateAssetsPercentWithinSpecifiedMilesOfGulfOfMexico
Namespace Prefix:	joe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant