XML 54 R41.htm IDEA: XBRL DOCUMENT
v3.20.2

Balancing and Memorandum Accounts (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | $ 8,287 | $ 21,628 | $ (1,940) | $ 25,549
Balancing and Memorandum Revenue Account, Increase (Decrease) | (1,087) | (9,275) | 2,299 | (5,410)
Refunds (Collections) Adjustments | 2,626 | (7,658) | 9,467 | (15,444)
Ending Balance | 9,826 | 4,695 | 9,826 | 4,695
Balancing and Memorandum Cost Recovery Account [Roll Forward] |  |  |  |
Beginning Balance | 9,328 | 6,549 | 7,223 | 8,864
Regulatory Asset Increase (Decrease) | 2,188 | 1,250 | 4,309 | (164)
Refunds (Collections) Adjustments | (7) | (886) | (23) | (1,787)
Ending Balance | 11,509 | 6,913 | 11,509 | 6,913
Balancing and Memorandum Account [Roll Forward] |  |  |  |
Beginning Balance | 17,615 | 28,177 | 5,283 | 34,413
Regulatory Asset Increase (Decrease) | 1,101 | (8,025) | 6,608 | (5,574)
Refunds (Collections) | 2,619 | (8,544) | 9,444 | (17,231)
Ending Balance | 21,335 | 11,608 | 21,335 | 11,608
Total balance, net under-collection amount | $ 2,245 |  | $ 2,245 |
Authorized revenue, threshold percentage | 2.00% |  | 2.00% |
Monterey WRAM |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | $ 10,549 | 8,986 | $ 7,015 | 6,847
Balancing and Memorandum Revenue Account, Increase (Decrease) | (1,124) | 328 | 2,437 | 3,994
Refunds (Collections) Adjustments | 2,625 | (1,502) | 2,598 | (3,029)
Ending Balance | 12,050 | 7,812 | 12,050 | 7,812
2014-2017 WCMA |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | 665 | 5,315 | 708 | 7,750
Balancing and Memorandum Revenue Account, Increase (Decrease) | 0 | 0 | 0 | 0
Refunds (Collections) Adjustments | 1 | (2,397) | (42) | (4,832)
Ending Balance | 666 | 2,918 | 666 | 2,918
2018 WCMA |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | 0 | 8,958 | 0 | 9,386
Balancing and Memorandum Revenue Account, Increase (Decrease) | 0 | (8,958) | 0 | (9,386)
Refunds (Collections) Adjustments | 0 | 0 | 0 | 0
Ending Balance | 0 | 0 | 0 | 0
2019 WCMA |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | 0 | 557 | 0 | 0
Balancing and Memorandum Revenue Account, Increase (Decrease) | 0 | (557) | 0 | 0
Refunds (Collections) Adjustments | 0 | 0 | 0 | 0
Ending Balance | 0 | 0 | 0 | 0
2012 General Rate Case true-up |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | 752 | 7,731 | 752 | 11,328
Balancing and Memorandum Revenue Account, Increase (Decrease) | 0 | (1) | 0 | 95
Refunds (Collections) Adjustments | 0 | (3,631) | 0 | (7,324)
Ending Balance | 752 | 4,099 | 752 | 4,099
Cost of capital memorandum account |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | (1,560) | (1,540) | (1,553) | (1,523)
Balancing and Memorandum Revenue Account, Increase (Decrease) | (1) | (7) | (8) | (24)
Refunds (Collections) Adjustments | 0 | 0 | 0 | 0
Ending Balance | (1,561) | (1,547) | (1,561) | (1,547)
Tax memorandum account |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | 332 | (6,585) | (6,643) | (6,504)
Balancing and Memorandum Revenue Account, Increase (Decrease) | 1 | (33) | (2) | (114)
Refunds (Collections) Adjustments | 0 | 0 | 6,978 | 0
Ending Balance | 333 | (6,618) | 333 | (6,618)
All others |  |  |  |
Balancing and Memorandum Revenue Account [Roll Forward] |  |  |  |
Beginning Balance | (2,451) | (1,794) | (2,219) | (1,735)
Balancing and Memorandum Revenue Account, Increase (Decrease) | 37 | (47) | (128) | 25
Refunds (Collections) Adjustments | 0 | (128) | (67) | (259)
Ending Balance | (2,414) | (1,969) | (2,414) | (1,969)
Balancing and Memorandum Cost Recovery Account [Roll Forward] |  |  |  |
Beginning Balance | 444 | 870 | 446 | 1,090
Regulatory Asset Increase (Decrease) | 0 | 2 | 2 | 8
Refunds (Collections) Adjustments | 0 | (223) | (4) | (449)
Ending Balance | 444 | 649 | 444 | 649
Water supply costs |  |  |  |
Balancing and Memorandum Cost Recovery Account [Roll Forward] |  |  |  |
Beginning Balance | 5,899 | 5,912 | 4,328 | 9,617
Regulatory Asset Increase (Decrease) | 1,222 | 1,049 | 2,827 | (754)
Refunds (Collections) Adjustments | 1 | (1,871) | (33) | (3,773)
Ending Balance | 7,122 | 5,090 | 7,122 | 5,090
Pension |  |  |  |
Balancing and Memorandum Cost Recovery Account [Roll Forward] |  |  |  |
Beginning Balance | 2,985 | (233) | 2,449 | (1,843)
Regulatory Asset Increase (Decrease) | (253) | 199 | 261 | 582
Refunds (Collections) Adjustments | 0 | 1,208 | 22 | 2,435
Ending Balance | 2,732 | 1,174 | 2,732 | 1,174
PRVMA |  |  |  |
Balancing and Memorandum Cost Recovery Account [Roll Forward] |  |  |  |
Beginning Balance | 0 | 0 | 0 | 0
Regulatory Asset Increase (Decrease) | 1,219 | 0 | 1,219 | 0
Refunds (Collections) Adjustments | (8) | 0 | (8) | 0
Ending Balance | $ 1,211 | $ 0 | $ 1,211 | $ 0

X
- Definition Balancing and Memorandum Account, Net + References No definition available. + Details
Name: | sjw_BalancingAndMemorandumAccountNet
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Balancing and Memorandum Account, Increase (Decrease) + References No definition available. + Details
Name: | sjw_BalancingandMemorandumAccountIncreaseDecrease
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Balancing and Memorandum Account, Refunds (Collections) + References No definition available. + Details
Name: | sjw_BalancingandMemorandumAccountRefundsCollections
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Balancing and Memorandum Account [Roll Forward] + References No definition available. + Details
Name: | sjw_BalancingandMemorandumAccountRollForward
Namespace Prefix: | sjw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Balancing and Memorandum Cost Recovery Account, Increase (Decrease) + References No definition available. + Details
Name: | sjw_BalancingandMemorandumCostRecoveryAccountIncreaseDecrease
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Balancing and Memorandum Cost Recovery Account, Net + References No definition available. + Details
Name: | sjw_BalancingandMemorandumCostRecoveryAccountNet
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Balancing and Memorandum Cost Recovery Account, Refunds (Collections) + References No definition available. + Details
Name: | sjw_BalancingandMemorandumCostRecoveryAccountRefundsCollections
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Balancing and Memorandum Cost Recovery Account [Roll Forward] + References No definition available. + Details
Name: | sjw_BalancingandMemorandumCostRecoveryAccountRollForward
Namespace Prefix: | sjw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Balancing and Memorandum Revenue Account, Increase (Decrease) + References No definition available. + Details
Name: | sjw_BalancingandMemorandumRevenueAccountIncreaseDecrease
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Balancing and Memorandum Revenue Accounting, Net + References No definition available. + Details
Name: | sjw_BalancingandMemorandumRevenueAccountNet
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Balancing and Memorandum Revenue Account, Refunds (Collections) + References No definition available. + Details
Name: | sjw_BalancingandMemorandumRevenueAccountRefundsCollections
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Balancing and Memorandum Revenue Account [Roll Forward] + References No definition available. + Details
Name: | sjw_BalancingandMemorandumRevenueAccountRollForward
Namespace Prefix: | sjw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Regulatory Balancing and Memorandum Accounts,, Net Under-Collected + References No definition available. + Details
Name: | sjw_RegulatoryBalancingandMemorandumAccountsNetUnderCollected
Namespace Prefix: | sjw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Threshold balance of regulatory balancing or memorandum accounts as a percentage of authorized revenue to trigger an account review. + References No definition available. + Details
Name: | sjw_RegulatoryBalancingandMemorandumAccountsReviewAuthorizedRevenueThresholdPercentage
Namespace Prefix: | sjw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=sjw_A20142017WCMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=sjw_A2018WCMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=sjw_A2019WCMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=sjw_A2012GeneralRateCaseTrueupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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