Segment Reporting - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting, Revenue Reconciling Item
Revenues	$ 83,709	$ 35,108	$ 152,747	$ 80,431
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	(2,793)	(26,831)	(7,588)	(35,913)
Water resource and water storage operations
Segment Reporting, Revenue Reconciling Item
Revenues	99	513	259	723
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	(1,540)	(1,249)	(3,233)	(2,741)
Real estate operations
Segment Reporting, Revenue Reconciling Item
Revenues	82,893	54,786	151,166	98,466
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	1,912	(1,721)	1,837	(5,500)
Corporate
Segment Reporting, Revenue Reconciling Item
Revenues	717	(20,191)	1,322	(18,758)
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	$ (3,165)	$ (23,861)	$ (6,192)	$ (27,672)