Segment Reporting (Details) Assets and Liabilities (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item
Assets	$ 696,732,000	$ 688,065,000
Consolidated Assets and Liabilities [Abstract]
Increase (decrease) in property and equipment	20,000,000
Increase (decrease) in canola seed inventories	7,100,000
Increase (decrease) in debt	29,400,000
Real Estate Operations
Segment Assets [Abstract]
Increase (decrease) in operating assets	18,700,000
Agribusiness Operations
Segment Assets [Abstract]
Increase (decrease) in operating assets	40,800,000
Corporate
Segment Assets [Abstract]
Increase (decrease) in operating assets	(45,500,000)
Segment, Continuing Operations | Water Resource and Water Storage Operations
Segment Reporting, Asset Reconciling Item
Assets	209,813,000	207,385,000
Segment, Continuing Operations | Real Estate Operations
Segment Reporting, Asset Reconciling Item
Assets	150,444,000	131,788,000
Segment, Continuing Operations | Agribusiness Operations
Segment Reporting, Asset Reconciling Item
Assets	163,451,000	122,664,000
Segment, Continuing Operations | Corporate
Segment Reporting, Asset Reconciling Item
Assets	103,706,000	149,180,000
Segment, Discontinued Operations
Segment Reporting, Asset Reconciling Item
Assets	$ 69,318,000	$ 77,048,000