Segment Reporting (Details) Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Segment Reporting, Asset Reconciling Item
Assets	$ 776,145	$ 667,174
Water Resource and Water Storage Operations
Segment Reporting, Asset Reconciling Item
Assets	193,245	210,189
Real Estate Operations
Segment Reporting, Asset Reconciling Item
Assets	228,244	145,978
Agribusiness Operations
Segment Reporting, Asset Reconciling Item
Assets	159,414	165,961
Corporate
Segment Reporting, Asset Reconciling Item
Assets	$ 195,242	$ 145,046