Long Term Water Assets (Volume of Water Assets) (Details)	Sep. 30, 2013	Dec. 31, 2012 acre_foot
Banked water and water for future delivery
Company water bank	8,818	8,700
Total Company and AVEK banked water	23,460	22,540
Transferable water with AVEK	1.5	14,786	[1]
Total purchased water - third parties	41,690	40,770
Total purchased and contracted water sources in acre feet	101,659	100,739
AVEK
Banked water and water for future delivery
AVEK water bank	12,280	11,478
AVEK water for future delivery	2,362	2,362
SWP Contracts
Banked water and water for future delivery
SWP and TCWD contracts	3,444	3,444
WRMWSD
Banked water and water for future delivery
SWP and TCWD contracts	15,547	15,547
TCWD
Banked water and water for future delivery
Total Company and AVEK banked water	38,943	38,943
SWP and TCWD contracts	5,479	5,479

[1] ransferable 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 acre feet.