Long-Term Water Assets - Volume of Water Assets (Details) - acre ft acre ft in Thousands	Jun. 30, 2019	Dec. 31, 2018
Banked water and water for future delivery
Water contracts and purchased water	10	10,137
Total purchased water contracts	86	83,980
Total purchased and contracted water sources in acre feet	143	133,306
AVEK water bank
Banked water and water for future delivery
AVEK water bank	0	13,033
Company water bank	50	35,793
Transferable water	6	500
Banked water and water for future delivery	57	49,326
WRMWSD - Contracts with Company
Banked water and water for future delivery
Water contracts and purchased water	16	15,547
Tejon-Castac Water District
Banked water and water for future delivery
Banked water and water for future delivery	55	52,547
Water contracts and purchased water	6	5,749