XML 55 R45.htm IDEA: XBRL DOCUMENT
v3.24.3

Regulatory Assets and Liabilities - Schedule of Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 340,419 | $ 257,621
Total Regulatory Liabilities | 734,925 | 683,717
Cost of removal |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 474,264 | 447,356
Future tax benefits due to customers |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 109,491 | 118,051
Pension and retiree group health |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 101,984 | 88,728
Other components of net periodic benefit cost |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 16,952 | 10,348
PCBA |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 14,085 | 8,972
ICBA |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 6,517 | 0
Health cost balancing account (HCBA) |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 3,979 | 3,242
Net WRAM and MCBA long-term payable |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 2,967 | 2,071
Conservation Expense Balancing Account |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 2,828 | 1,200
RSF regulatory liability |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 0 | 2,116
Other regulatory liabilities |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Liabilities | 1,858 | 1,633
Future tax benefits due to customers |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 158,486 | 158,486
IRMA long-term accounts receivable |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 49,505 | 3,430
Asset retirement obligations, net |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 29,134 | 26,686
Other accrued benefits |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 26,663 | 25,363
Tank coating |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 21,345 | 19,602
MWRAM |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 14,253 | 0
MWRAM | Minimum |  |
Regulatory Assets and Liabilities [Line Items] |  |
Recovery Period | 1 year |
MWRAM | Maximum |  |
Regulatory Assets and Liabilities [Line Items] |  |
Recovery Period | 2 years |
General district balancing account |  |
Regulatory Assets and Liabilities [Line Items] |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 10,945 | 390
Customer assistance program (CAP) and Rate support fund (RSF) accounts receivable |  |
Regulatory Assets and Liabilities [Line Items] |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 9,056 | 2,459
ICBA |  |
Regulatory Assets and Liabilities [Line Items] |  |
Recovery Period | 1 year |
Total Regulatory Assets | $ 9,479 | 0
Net WRAM and modified cost balancing account (MCBA) long-term accounts receivable |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 4,216 | 10,738
PCBA |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 0 | 4,182
Recoverable property losses |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | 2,625 | 3,121
Other regulatory assets |  |
Regulatory Assets and Liabilities [Line Items] |  |
Total Regulatory Assets | $ 4,712 | $ 3,164

X
- References No definition available. + Details
Name: | cwt_RegulatoryAssetsAndLiabilitiesLineItems
Namespace Prefix: | cwt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 + Details
Name: | us-gaap_RegulatoryAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_RemovalObligationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_PensionAndPostRetirementBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_OtherComponentsOfNetPeriodicBenefitCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_PensionBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_IncrementalCostBalancingAccountICBAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_HealthCareBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_NetWRAMandMCBALongtermPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_ConservationProgramLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=cwt_RSFRegulatoryLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_OtherRegulatoryAssetsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_InterimRatesLongTermAccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_AssetRetirementObligationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_OtherAccruedBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_TankCoatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_MontereyStyleWaterRevenueAdjustmentMechanismMWRAMMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_GeneralDistrictBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_LowIncomeRateAssistanceAndRateSupportFundAccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_IncrementalCostBalancingAccountICBAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_AccountsReceivableNetWRAMAndMCBAAccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_PensionBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_RecoverablePropertyLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=cwt_OtherRegulatoryAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |