Segment Reporting - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item
Assets	$ 675,826	$ 804,444
Water resource and water storage operations
Segment Reporting, Asset Reconciling Item
Assets	185,677	186,294
Real estate operations
Segment Reporting, Asset Reconciling Item
Assets	427,993	384,855
Corporate
Segment Reporting, Asset Reconciling Item
Assets	48,128	80,741
Discontinued agribusiness operations
Segment Reporting, Asset Reconciling Item
Assets	$ 14,028	$ 152,554