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Commitments and Contingencies (Details) | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Feb. 28, 2015 participant | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) a facility acre ft | Apr. 07, 2017 a | Dec. 31, 2016 USD ($) | Dec. 31, 2013 acre ft
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Contract renewal optional term |  |  | 35 years |  |  |
Estimated future minimum annual payments |  |  | $ 800,000 |  |  |
Number of community facility districts | facility |  |  | 2 |  |  |
Acres of land related to land liens | a |  |  |  | 190 |  |
Letter of credit period |  |  | 2 years |  |  |
Letter of credit renewal period |  |  | 2 years |  |  |
Annual cost related to letter of credit |  |  | $ 139,000 |  | $ 161,000 |
Special taxes paid |  |  | $ 2,578,000 |  |  |
Settled Litigation | Antelope Valley Groundwater Cases |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Number of parties settled (more than) | participant | 140 |  |  |  |  |
Percent of water used within the adjudication boundary | 99.00% |  |  |  |  |
Tejon-Castac Water District | Kern Water Bank Authority |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Percentage of interest rate held |  |  | 2.00% |  |  |
Standby letter of credit |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Letters of credit outstanding amount |  |  | $ 4,921,000 |  |  |
Annual cost related to letter of credit |  |  | $ 83,000 |  |  |
West CFD |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Acres of land related to land liens | a |  |  | 420 |  |  |
Bond debt sold by TRPFFA |  |  | $ 28,620,000 |  |  |
Additional bond debt authorized to be sold in future |  |  | 0 |  |  |
Additional reimbursement funds |  |  | $ 0 |  |  |
East CFD |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Acres of land related to land liens | a |  |  | 1,931 |  |  |
Bond debt sold by TRPFFA |  |  | $ 55,000,000 |  |  |
Additional bond debt authorized to be sold in future |  |  | 65,000,000 |  |  |
Additional reimbursement funds |  |  | $ 7,768,000 |  |  |
DMB Pacific LLC |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Contract renewal optional term |  |  | 35 years |  |  |
DMB Pacific LLC | Transferable water |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Long-term water assets (Volume) | acre ft |  |  | 6,693 |  |  | 6,693
Scenario, Forecast |  |  |  |  |  |
Commitment and Contingencies Disclosure [Line Items] |  |  |  |  |  |
Amount paid for water contracts |  | $ 8,884,000 |  |  |  |

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