Segment Reporting - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item
Assets	$ 660,521	$ 662,085
Water resource and water storage operations
Segment Reporting, Asset Reconciling Item
Assets	185,380	185,037
Real estate operations
Segment Reporting, Asset Reconciling Item
Assets	426,751	421,411
Corporate
Segment Reporting, Asset Reconciling Item
Assets	41,879	46,844
Discontinued agribusiness operations
Segment Reporting, Asset Reconciling Item
Assets	$ 6,511	$ 8,793