Long-Term Water Assets - Volume of Water Assets (Details)		Jun. 30, 2015 aft	Dec. 31, 2014 aft	Dec. 31, 2009 aft	Dec. 31, 2008 aft
Banked water and water for future delivery
Total purchased water - third parties		49,018	49,461
Total purchased and contracted water sources in acre feet		104,595	109,158
Transferable water with AVEK multiple		1.5
Transferable water
Banked water and water for future delivery
Total purchased water - third parties		22,179
AVEK
Banked water and water for future delivery
AVEK water bank		13,033	13,033	6,393	8,393
Company water bank		8,700	8,700
AVEK water for future delivery		2,362	2,362
Banked water and water for future delivery		24,095	24,095
Transferable water	[1]	14,786	15,229
Affiliated Entity
Banked water and water for future delivery
Water contracts and purchased water		10,137	10,137
Wheeler Ridge Maricopa Water Storage District
Banked water and water for future delivery
Water contracts and purchased water		15,547	15,547
Tejon-Castac Water District
Banked water and water for future delivery
Banked water and water for future delivery		34,281	38,401
Water contracts and purchased water		5,749	5,749
SWP contracts
Banked water and water for future delivery
AVEK water for future delivery				3,444

[1] Any transferable water with AVEK that is used by the Company or returned by AVEK to the Company will be returned at a 1.5 to 1 factor giving the Company use of a total of 22,179 (14,786 x 1.5) acre feet.