Subsequent Event (Details) (Subsequent Event [Member], USD $)	1 Months Ended
	Jul. 31, 2013
Scenario, Forecast [Member]
Subsequent Event [Line Items]
Gain expected from easement grant	$ 19,900,000
Capital Loss Carryforward [Member]
Subsequent Event [Line Items]
Capital loss carryforwards	48,000,000
Capital Loss Carryforward [Member] | Scenario, Forecast [Member]
Subsequent Event [Line Items]
Capital gain utilization	19,900,000
Hendry County, FL Property [Member]
Subsequent Event [Line Items]
Area of land	11,600
Proceeds from easement grant	$ 20,678,000