Proposed Sale Transactions Proposed Sale Transactions (Details) (USD $)						0 Months Ended		0 Months Ended
	Dec. 31, 2013 acre	Dec. 31, 2012	Dec. 31, 2013 Community Development District Debt	Dec. 31, 2012 Community Development District Debt	Dec. 31, 2013 Community Development District Debt Rivers Edge CDD Assessments	Nov. 06, 2013 AgReserves Sale acre	Dec. 31, 2013 AgReserves Sale	Dec. 31, 2013 RiverTown Sale business_day acre		Dec. 31, 2013 RiverTown Sale Minimum	Dec. 31, 2013 RiverTown Sale Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proposed land sale, area of land (in acres)	567,000					382,834		4,057
Proposed land sale, purchase price						$ 565,000,000		$ 43,600,000
Proposed land sale, deposit amount						37,500,000.0		100,000.0
Proposed land sale, deposit amount due								1,900,000
Number of business days remaining deposit is due after the conclusion of the inspection period								3
Proposed land sale, purchase price reduction						40,000,000
Proposed land sale, termination fee						21,000,000
Proposed land sale, expected impact fee credit										20,000,000	26,000,000
Proposed land sale, expected impact fee credit, period for recognition								5 years
Proposed land sale, reimburseable costs and expenses upon termination						1,500,000.0
Carrying amount of the assets and liabilities expected to be included in the Sale
Investment in real estate, net							54,668,000	22,307,000
Property and equipment, net							209,000
Other assets							1,543,000	251,000
Total assets							56,420,000	22,558,000
Debt								5,521,000	[1]
Accrued liabilities and deferred credits							12,641,000	293,000
Net carrying value								16,744,000
Long term debt	$ 44,217,000	$ 36,062,000	$ 11,512,000	$ 9,244,000	$ 11,100,000

[1] Only Rivers Edge CDD assessments for platted property have been recorded as a liability. The Company's total outstanding Rivers Edge CDD assessments at December 31, 2013 are $11.1 million.