Segment Reporting - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting, Revenue Reconciling Item
Revenues	$ 78,091	$ 59,158	$ 158,523	$ 153,131
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	1,099	(4,989)	(34,816)	(18,440)
Water resource and water storage operations
Segment Reporting, Revenue Reconciling Item
Revenues	3,468	1,087	4,191	1,464
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	834	(1,131)	(1,907)	(4,965)
Real estate operations
Segment Reporting, Revenue Reconciling Item
Revenues	73,777	55,794	172,243	145,212
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	3,839	(795)	(1,661)	(6,251)
Corporate
Segment Reporting, Revenue Reconciling Item
Revenues	846	2,277	(17,911)	6,455
Income (loss) from continuing operations before income taxes and equity in loss of unconsolidated affiliates	$ (3,574)	$ (3,063)	$ (31,248)	$ (7,224)