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Regulatory Assets and Liabilities - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | $ 337,132 | $ 325,376
Total Regulatory Liabilities | 184,689 | 180,718
Future tax benefits due to customers |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Liabilities | 151,453 | 151,011
Retiree group health |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Liabilities | 18,472 | 18,472
HCBA |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Liabilities | 7,708 | 5,320
CEBA |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Liabilities | 5,126 | 3,837
Net WRAM and MCBA long-term payable |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Liabilities | 828 | 479
Other regulatory liabilities |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Liabilities | 1,102 | 1,599
Pension and retiree group health |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | 59,259 | 59,588
Future tax benefits due to customers |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | 120,941 | 120,365
Other accrued benefits |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | 22,933 | 21,692
Net WRAM and MCBA long-term accounts receivable |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | 37,180 | 33,136
Asset retirement obligations, net |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | $ 22,143 | 21,110
IRMA long-term accounts receivable |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 22,197 | 14,705
Tank coating |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 10 years |
Total Regulatory Assets | $ 13,880 | 14,018
Recoverable property losses |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 9 years |
Total Regulatory Assets | $ 4,187 | 4,531
PCBA |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 19,807 | 19,647
Other components of net periodic benefit cost |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | $ 4,965 | 6,736
General district balancing account receivable |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 707 | 1,830
Low-income rate assistance (LIRA) and Rate support fund (RSF) accounts receivable |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 6,232 | 5,310
Other regulatory assets |  |
Regulatory Assets and Liabilities |  |
Total Regulatory Assets | $ 2,701 | $ 2,708
Minimum | Net WRAM and MCBA long-term accounts receivable |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 1 year |
Maximum | Net WRAM and MCBA long-term accounts receivable |  |
Regulatory Assets and Liabilities |  |
Recovery Period | 2 years |

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