Commitments and Contingencies (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2012 acre	Dec. 31, 2011
Commitments and Contingencies (Textual) [Abstract]
Acres of land subject to water contracts	5,488
Acres of land released from land liens	1,457
Commitments and Contingencies (Additional Textual) [Abstract]
Estimated future minimum annual payments	$ 2,500,000
Letter of credit period	2 years
Letter of credit renewal period	2 years
Additional reimbursement funds	0
Special taxes paid		1,061,000
Standby letter of credit [Member]
Commitments and Contingencies (Textual) [Abstract]
Standby letter of credit	2,189,000
Letter of credit [Member]
Commitments and Contingencies (Textual) [Abstract]
Annual cost related to letter of credit	33,000
West CFD [Member]
Commitments and Contingencies (Textual) [Abstract]
Acres of land released from land liens	271
Standby letter of credit	30,000,000
Additional bond debt authorized to be sold in future	0
East CFD [Member]
Commitments and Contingencies (Textual) [Abstract]
Acres of land released from land liens	1,931
Standby letter of credit	12,670,000
Additional bond debt authorized to be sold in future	$ 107,000,000