Concentration Of Risks And Uncertainties (Details)	3 Months Ended
Mar. 31, 2012 Y M
Concentration Of Risks And Uncertainties [Abstract]
Period under bankruptcy protection (months)	18
Liability period following mill closure (years)	1

Bankruptcy of customer, period under bankruptcy protection

No definition available.

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Namespace Prefix:	joe_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration