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Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Retirement Benefits [Abstract] |
Schedule of Assumptions Used | Net periodic cost for the defined benefit plans and other postretirement benefits was calculated using the following weighted-average assumptions:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
| % |  | % |  | % |  | % |  | % |  | %
Discount rate | 3.52 |  | 4.04 |  | 4.24 |  | 3.45 |  | 3.93 |  | 4.10
Expected return on plan assets | 7.00 |  | 7.00 |  | 7.00 |  | 7.00 |  | 7.00 |  | 7.00
Rate of compensation increase | 4.00 |  | 4.00 |  | 4.00 |  | N/A |  | N/A |  | N/A
Benefit obligations for the defined benefit plans and other postretirement benefits were calculated using the following weighted-average assumptions as of December 31:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2018 |  | 2017
| % |  | % |  | % |  | %
Discount rate | 4.16 |  | 3.52 |  | 4.09 |  | 3.45
Rate of compensation increase | 4.00 |  | 4.00 |  | N/A |  | N/A
Schedule of Net Benefit Costs | Net periodic costs for the defined benefit plans and other postretirement benefits for the years ended December 31 was as follows:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 5,790 |  |  | 4,699 |  |  | 4,447 |  |  | $ | 616 |  |  | 529 |  |  | 527 |
Interest cost | 6,879 |  |  | 6,993 |  |  | 6,830 |  |  | 627 |  |  | 634 |  |  | 655 |
Expected return on assets | (9,255 | ) |  | (7,888 | ) |  | (7,288 | ) |  | (450 | ) |  | (376 | ) |  | (292 | )
Amortization of prior service cost | 51 |  |  | 94 |  |  | 376 |  |  | 197 |  |  | 198 |  |  | 197 |
Recognized actuarial loss | 3,986 |  |  | 3,844 |  |  | 3,527 |  |  | 321 |  |  | 273 |  |  | 316 |
Net periodic benefit cost | $ | 7,451 |  |  | 7,742 |  |  | 7,892 |  |  | $ | 1,311 |  |  | 1,258 |  |  | 1,403 |
The components of net periodic benefit cost have been recorded in the consolidated statements of comprehensive income as follows:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2016 |  | 2018 |  | 2017 |  | 2016
Net periodic benefit cost recorded on income statement |  |  |  |  |  |  |  |  |  |  |
Other production expenses | 1,534 |  |  | 1,231 |  |  | 1,165 |  |  | 163 |  |  | 139 |  |  | 138 |
Administrative and general expense | 3,249 |  |  | 2,632 |  |  | 2,490 |  |  | 346 |  |  | 296 |  |  | 295 |
Maintenance expense | 1,007 |  |  | 836 |  |  | 792 |  |  | 107 |  |  | 94 |  |  | 94 |
Pension non-service costs | 1,661 |  |  | 3,043 |  |  | 3,445 |  |  | 695 |  |  | 729 |  |  | 876 |
| $ | 7,451 |  |  | 7,742 |  |  | 7,892 |  |  | $ | 1,311 |  |  | 1,258 |  |  | 1,403 |
Schedule of Net Funded Status | The projected benefit obligations and the funded status of San Jose Water Company’s defined benefit pension and other postretirement plans as of December 31 were as follows:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2018 |  | 2017
Change in benefit obligation |  |  |  |  |  |  |
Benefit obligation at beginning of year | $ | 196,207 |  |  | 174,097 |  |  | $ | 18,003 |  |  | 16,461 |
Service cost | 5,790 |  |  | 4,699 |  |  | 616 |  |  | 529 |
Interest cost | 6,879 |  |  | 6,993 |  |  | 627 |  |  | 634 |
Actuarial (gain)/loss | (14,447 | ) |  | 16,552 |  |  | (988 | ) |  | 1,124 |
Implicit rate subsidy | — |  |  | — |  |  | (207 | ) |  | (196 | )
Benefits paid | (6,552 | ) |  | (6,134 | ) |  | (562 | ) |  | (549 | )
Benefit obligation at end of year | $ | 187,877 |  |  | 196,207 |  |  | $ | 17,489 |  |  | 18,003 |
Change in plan assets |  |  |  |  |  |  |
Fair value of assets at beginning of year | $ | 133,360 |  |  | 113,895 |  |  | $ | 6,804 |  |  | 5,366 |
Actual return on plan assets | (7,700 | ) |  | 17,298 |  |  | (262 | ) |  | 736 |
Employer contributions | 8,502 |  |  | 8,301 |  |  | 629 |  |  | 702 |
Benefits paid | (6,552 | ) |  | (6,134 | ) |  | (1,322 | ) |  | — |
Fair value of plan assets at end of year | 127,610 |  |  | 133,360 |  |  | 5,849 |  |  | 6,804 |
Funded status at end of year | $ | (60,267 | ) |  | (62,847 | ) |  | $ | (11,640 | ) |  | (11,199 | )
Schedule of Amounts Recognized in Balance Sheet | The amounts recognized on the balance sheet as of December 31 were as follows:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2018 |  | 2017
Current liabilities | $ | 1,323 |  |  | 1,099 |  |  | $ | 94 |  |  | 86 |
Noncurrent liabilities | 58,944 |  |  | 61,748 |  |  | 11,546 |  |  | 11,113 |
| $ | 60,267 |  |  | 62,847 |  |  | $ | 11,640 |  |  | 11,199 |
Schedule of Regulatory Asset Recorded on the Projected Benefit Obligation of the Postretirement Benefit Plans | San Jose Water Company recorded a regulatory asset on the projected benefit obligation of the postretirement benefit plans as follows:
| 2018 |  | 2017
Funded status of obligation | $ | 71,907 |  |  | 74,046 |
Accrued benefit cost | (5,674 | ) |  | (5,490 | )
Regulatory asset, amount to be recovered in future rates | $ | 66,233 |  |  | 68,556 |
Schedule of Allocation of Plan Assets | Plan assets as of December 31 were as follows:
| Pension Benefits |  | Other Benefits
| 2018 |  | 2017 |  | 2018 |  | 2017
Fair value of assets at end of year: |  |  |  |  |  |  |
Debt securities | $ | 42,654 |  |  | 42,784 |  |  | $ | 2,200 |  |  | 1,710 |
| 33 | % |  | 32 | % |  | 38 | % |  | 25 | %
Equity securities | 77,053 |  |  | 83,352 |  |  | 3,416 |  |  | 4,111 |
| 60 | % |  | 63 | % |  | 58 | % |  | 60 | %
Cash and equivalents | 7,903 |  |  | 7,224 |  |  | 233 |  |  | 983 |
| 6 | % |  | 5 | % |  | 4 | % |  | 14 | %
Total | $ | 127,610 |  |  | 133,360 |  |  | $ | 5,849 |  |  | 6,804 |
The following tables summarize the fair values of plan assets by major categories as of December 31, 2018 and 2017:
|  |  |  |  | Fair Value Measurements at December 31, 2018
Asset Category | Benchmark |  | Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Cash and cash equivalents |  |  | $ | 8,136 |  |  | $ | 8,136 |  |  | $ | — |  |  | $ | — |
Actively Managed (a): |  |  |  |  |  |  |  |  |
All Cap Equity | Russell 3000 Value |  | 5,670 |  |  | 5,632 |  |  | 38 |  |  | — |
U.S. Large Cap Equity | Russell 1000, Russell 1000 Growth, Russell 1000 Value |  | 47,040 |  |  | 47,040 |  |  | — |  |  | — |
U.S. Mid Cap Equity | Russell Mid Cap, Russell Mid Cap Growth, Russell Mid Cap Value |  | 8,372 |  |  | 8,372 |  |  | — |  |  | — |
U.S. Small Cap Equity | Russell 2000, Russell 2000 Growth, Russell 2000 Value, Russell 2500 |  | 8,528 |  |  | 8,528 |  |  | — |  |  | — |
Non-U.S. Large Cap Equity | MSCI EAFE |  | 4,969 |  |  | 4,969 |  |  | — |  |  | — |
REIT | NAREIT—Equity REIT’s |  | 5,889 |  |  | — |  |  | 5,889 |  |  | — |
Fixed Income (b) | (b) |  | 44,855 |  |  | — |  |  | 44,855 |  |  | — |
Total |  |  | $ | 133,459 |  |  | $ | 82,677 |  |  | $ | 50,782 |  |  | $ | — |
___________________________________ The Plan has a current target allocation of 55% invested in a diversified array of equity securities to provide long-term capital appreciation and 45% invested in a diversified array of fixed income securities to provide preservation of capital plus generation of income.
(a) | Actively managed portfolio of securities with the goal to exceed the stated benchmark performance.
(b) | Actively managed portfolio of fixed income securities with the goal to exceed the Barclays 1-5 Year Government/Credit, Barclays Intermediate Government/Credit, and Merrill Lynch Preferred Stock Fixed Rate.
|  |  |  |  | Fair Value Measurements at December 31, 2017
Asset Category | Benchmark |  | Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Cash and cash equivalents |  |  | $ | 8,207 |  |  | $ | 8,207 |  |  | $ | — |  |  | $ | — |
Actively Managed (a): |  |  |  |  |  |  |  |  |
All Cap Equity | Russell 3000 Value |  | 6,413 |  |  | 6,376 |  |  | 37 |  |  | — |
U.S. Large Cap Equity | Russell 1000, Russell 1000 Growth, Russell 1000 Value |  | 50,351 |  |  | 50,351 |  |  | — |  |  | — |
U.S. Mid Cap Equity | Russell Mid Cap, Russell Mid Cap Growth, Russell Mid Cap Value |  | 9,358 |  |  | 9,358 |  |  | — |  |  | — |
U.S. Small Cap Equity | Russell 2000, Russell 2000 Growth, Russell 2000 Value |  | 8,725 |  |  | 8,725 |  |  | — |  |  | — |
Non-U.S. Large Cap Equity | MSCI EAFE |  | 5,973 |  |  | 5,973 |  |  | — |  |  | — |
REIT | NAREIT—Equity REIT’s |  | 6,143 |  |  | — |  |  | 6,143 |  |  | — |
Fixed Income (b) | (b) |  | 44,994 |  |  | — |  |  | 44,994 |  |  | — |
Total |  |  | $ | 140,164 |  |  | $ | 88,990 |  |  | $ | 51,174 |  |  | $ | — |
___________________________________ The Plan has a current target allocation of 55% invested in a diversified array of equity securities to provide long-term capital appreciation and 45% invested in a diversified array of fixed income securities to provide preservation of capital plus generation of income.
(a) | Actively managed portfolio of securities with the goal to exceed the stated benchmark performance.
(b) | Actively managed portfolio of fixed income securities with the goal to exceed the Barclays 1-5 Year Government/Credit, Barclays Intermediate Government/Credit, and Merrill Lynch Preferred Stock Fixed Rate.
Schedule of Expected Benefit Payments | Benefits expected to be paid in the next five years and in the aggregate for the five years thereafter are:
| Pension Plan |  | Other Postretirement Benefit Plan
2019 | $ | 7,235 |  |  | $ | 851 |
2020 | 7,550 |  |  | 852 |
2021 | 8,013 |  |  | 903 |
2022 | 8,419 |  |  | 951 |
2023 | 8,886 |  |  | 992 |
2024 - 2027 | 50,695 |  |  | 5,366 |

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