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Long Term Water Assets - Additional Information (Details) $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Aug. 06, 2015 $ / acre ft acre ft | Dec. 31, 2018 $ / acre ft | Dec. 31, 2017 USD ($) $ / acre ft acre ft | Dec. 31, 2016 USD ($) acre ft | Dec. 31, 2015 USD ($) acre ft | Dec. 31, 2013 acre ft | Dec. 31, 2009 acre ft | Dec. 31, 2008 acre ft
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Contract renewal optional term |  |  | 35 years |  |  |  |  |
Cost of purchased water | $ |  |  | $ 765 | $ 5,925 | $ 5,483 |  |  |
Water sold (volume) (in acre-feet) |  |  | 939 | 7,285 | 7,922 |  |  |
Water assets sales price | $ |  |  | $ 1,254 | $ 9,601 | $ 10,165 |  |  |
Transferable water |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
AVEK water bank (in acre-feet) |  |  | 6,169 |  |  |  |  |
SWP contracts |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Water contract future amortization | $ |  |  | $ 1,351 |  |  |  |  |
AVEK |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
AVEK water bank (in acre-feet) |  |  | 13,033 | 13,033 |  |  | 6,393 | 8,393
AVEK water for future delivery (in acre-feet) |  |  | 0 | 2,362 |  |  |  |
AVEK | Transferable water |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
AVEK water bank (in acre-feet) |  |  | 1,452 |  |  |  |  |
SWP contracts |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
AVEK water for future delivery (in acre-feet) |  |  |  |  |  |  | 3,444 |
DMB Pacific LLC |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Contract renewal optional term |  |  | 35 years |  |  |  |  |
Consumer price per acre (per acre-foot) | $ / acre ft |  |  | 717 |  |  |  |  |
DMB Pacific LLC | Maximum |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Annual fee increase, percent |  |  | 3.00% |  |  |  |  |
DMB Pacific LLC | Scenario, Forecast |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Consumer price per acre (per acre-foot) | $ / acre ft |  | 738 |  |  |  |  |  |
DMB Pacific LLC | Transferable water |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Long-term water assets (Volume) (in acre-feet) |  |  | 6,693 |  |  | 6,693 |  |
PEF | Transferable water | Ranchcorp |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Consumer price per acre (per acre-foot) | $ / acre ft | 1,025 |  |  |  |  |  |  |
Annual fee increase, percent | 3.00% |  |  |  |  |  |  |
Annual option payment, percent | 30.00% |  |  |  |  |  |  |
PEF | Transferable water | Maximum | Ranchcorp |  |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |  |
Water assets, volume available for purchase in 2016 (up to) (in acre-feet) | 2,000 |  |  |  |  |  |  |
Water assets, volume available for purchase from 2017-2030 (up to) (in acre-feet) | 3,500 |  |  |  |  |  |  |

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