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Summary of Significant Accounting Policies (Policies) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Business Combinations Policy [Policy Text Block] | SJW Group applies the provisions of ASC Topic 805—“Business Combinations” for the purchase accounting related to the merger with CTWS on October 9, 2019. Topic 805 requires SJW Group to recognize separately from goodwill the assets acquired and the liabilities assumed at the acquisition date fair values. Goodwill as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date fair values of the assets acquired and the liabilities assumed. While SJW Group uses our best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, we record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our Consolidated Statements of Comprehensive Income. Accounting for business combinations requires SJW Group to make significant estimates and assumptions, especially at the acquisition date, including estimates for intangible assets, contractual obligations assumed and pre-acquisition contingencies. Although SJW Group believes that the assumptions and estimates we make are reasonable and appropriate, they are based in part on historical experience and information obtained from CTWS’s management and are inherently uncertain. Events and circumstances may occur that may affect the accuracy or validity of such assumptions, estimates or actual results. The purchase price allocation process requires management to make significant estimates and assumptions with respect to intangible assets. Although SJW Group believes the assumptions and estimates made are reasonable, they are based in part on historical experience, market conditions and information obtained from management of the acquired companies and are inherently uncertain. Examples of critical estimates in valuing certain of the intangible assets we have acquired or may acquire in the future include, but are not limited to: future expected cash flows from services; historical and expected customer attrition rates and anticipated growth in revenue from acquired customers; the expected use of the acquired assets; and discount rates.
Consolidation Policy | The accompanying consolidated financial statements include the accounts of SJW Group, its wholly owned subsidiaries, and two variable interest entities in which two SJW Group subsidiaries are the primary beneficiaries. All intercompany transactions and balances have been eliminated in consolidation.
Recently Adopted Accounting Principles Policy | In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, “Leases (Topic 842),” as amended, which supersedes the lease requirements in “Leases (Topic 840).” This ASU generally requires lessees to recognize operating and financing lease liabilities and corresponding right-of-use assets on the Consolidated Balance Sheets and to provide enhanced disclosures surrounding the amount, timing and uncertainty of cash flows arising from leasing arrangements. ASU 2016-02 also makes some changes to lessor accounting and aligns with the new revenue recognition guidance. SJW Group adopted the new standard effective January 1, 2019, on a modified retrospective basis and did not restate comparative periods. SJW Group also elected the package of practical expedients permitted under the transition guidance and combined lease and non-lease components. In addition, SJW Group kept leases with an initial term of 12 months or less off the Consolidated Balance Sheets and recognized the associated lease payments in the Consolidated Statements of Comprehensive Income on a straight-line basis over the lease term. The adoption of this standard did not have a material impact on SJW Group’s consolidated financial statements.
Use of Estimates Policy | The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Utility Plant Policy | The cost of additions, replacements and betterments to utility plant is capitalized. The amount of interest capitalized in 2019, 2018 and 2017 was $4,323, $2,856 and $2,807, respectively. Construction in progress was $112,232 and $68,765 at December 31, 2019 and 2018, respectively. The major components of depreciable plant and equipment as of December 31, 2019 and 2018 are as follows:
| 2019 |  | 2018
Equipment | $ | 521,183 |  |  | 335,358 |
Transmission and distribution | 2,207,051 |  |  | 1,375,821 |
Office buildings and other structures | 260,220 |  |  | 121,872 |
Total depreciable plant and equipment | $ | 2,988,454 |  |  | 1,833,051 |
Depreciation is computed using the straight-line method over the estimated remaining service lives of groups of assets, ranging from 5 to 75 years. The estimated service lives of depreciable plant and equipment are as follows:
| Useful Lives
Equipment | 5 to 35 years
Transmission and distribution plant | 35 to 75 years
Office buildings and other structures | 7 to 50 years
For the years 2019, 2018 and 2017, depreciation expense as a percent of the beginning of the year balance of depreciable plant was approximately 3.8%, 3.6% and 3.6%, respectively. A portion of depreciation expense was allocated to administrative and general expense. For the years 2019, 2018 and 2017, the amounts allocated to administrative and general expense were $2,869, $2,306 and $2,209, respectively. Depreciation expense for utility plant for the years ended December 31, 2019, 2018 and 2017 was $63,785, $53,031 and $46,456, respectively. The cost of utility plant retired, including retirement costs (less salvage), is charged to accumulated depreciation and no gain or loss is recognized.
Utility Plant Intangible Assets Policy | All intangible assets are recorded at cost and are amortized using the straight-line method over the estimated useful life of the asset, ranging from 5 to 70 years (see Note 6, “Utility Plant Intangible Assets”).
Real Estate Investments Policy | Real estate investments are recorded at cost and consist primarily of land and buildings. Net gains and losses from the sale of real estate investments are recorded as a component of other (expense) income in the Consolidated Statements of Comprehensive Income. Nonutility property in Water Utility Services is also classified in real estate investments and not separately disclosed on the balance sheet based on the immateriality of the amount. Nonutility property is property that is neither used nor useful in providing water utility services to customers and is excluded from the rate base for rate-setting purposes. SJWC recognizes gain/loss on disposition of nonutility property in accordance with California Public Utilities Commission (“CPUC”) Code Section 790, whereby the net proceeds are reinvested back into property that is useful in providing water utility services to customers. There is no depreciation associated with nonutility property as it is all land. Depreciation on buildings and improvements for real estate investments is computed using the straight-line method over the estimated useful lives of the assets, ranging from 7 to 39 years.
Impairment of Long-Lived Assets Policy | In accordance with the requirements of FASB ASC Topic 360—“Property, Plant and Equipment,” the long-lived assets of SJW Group are reviewed for impairment when changes in circumstances or events require adjustments to the carrying values of the assets. When such changes in circumstances or events occur, the company assesses recoverability by determining whether the carrying value of such assets will be recovered through the undiscounted expected future cash flows. To the extent an impairment exists, the asset is written down to its estimated fair value with a corresponding charge to operations in the period in which the impairment is identified. Long-lived assets consist primarily of utility plant in service, real estate investments, intangible assets, and regulatory assets. In addition, the company tests unamortized intangible assets, which primarily relate to water rights, at least annually or more frequently if events or changes in circumstances indicate that the asset may be impaired. SJW Group first performs a qualitative assessment to determine whether it is necessary to perform the quantitative impairment test. In assessing the qualitative factors, SJW Group considers the impact of these key factors: change in industry and competitive environment, financial performance, and other relevant Company-specific events. If SJW Group determines that as a result of the qualitative assessment it is more likely than not (> 50% likelihood) that the fair value is less than carrying amount, then a quantitative test is performed.
Goodwill and Intangible Assets, Policy [Policy Text Block] | Goodwill represents the excess of the purchase price paid over the estimated fair value of the assets acquired and liabilities assumed in the acquisition of a business. Goodwill is not amortized and must be allocated at the reporting unit level, which is defined as an operating segment or one level below, and tested for impairment at least annually, or more frequently if an event occurs or circumstances change that would more likely than not, reduce the fair value of a reporting unit below its carrying value.
Cash and Cash Equivalents, Policy [Policy Text Block] | Cash and cash equivalents primarily consist of cash on deposit with banks with maturities of three months or less from the date of purchase.
Financial Instruments Policy | The following instruments are not measured at fair value on the company’s consolidated balance sheets but, require disclosure of fair values: cash and cash equivalents, accounts receivable and accounts payable. The estimated fair value of such instruments approximates their carrying value as reported on the consolidated balance sheets. The fair value of such financial instruments are determined using the income approach based on the present value of estimated future cash flows. The fair value of these instruments would be categorized as Level 2 in the fair value hierarchy, with the exception of cash and cash equivalents, which would be categorized as Level 1.
Investment in Caifornia Water Service Group Policy | SJW Group’s had an investment in California Water Service Group which was accounted for under FASB ASC Topic 320—“Investment—Debt and Equity Securities,” as an available-for-sale marketable security. The investment was recorded on the Consolidated Balance Sheet at its quoted market price with the change in unrealized gain or loss reported, net of tax, as a component of other expense (income) with the adoption of ASU 2016-01 on January 1, 2018. Prior to adoption, the changes in unrealized gain or loss, net of tax, were reported as a component of other comprehe
Balancing and Memorandum Accounts Policy | In California, the CPUC has established a balancing account mechanism for the purpose of tracking the under-collection or over-collection associated with expense changes and the revenue authorized by the CPUC to offset those expense changes. SJWC also maintains memorandum accounts to track revenue impacts due to catastrophic events, certain unforeseen water quality expenses related to new federal and state water quality standards, energy efficiency, water conservation, water tariffs, and other approved activities or as directed by the CPUC. Balancing and memorandum accounts are recognized by SJWC when it is probable that future recovery of previously incurred costs or future refunds that are to be credited to customers will occur through the ratemaking process. In addition, in the case of special revenue programs such as the Water Conservation Memorandum Account (“WCMA”) and WRA, SJWC and CTWS follow the requirements of ASC Topic 980-605-25—“Alternative Revenue Programs” in determining revenue recognition, including the requirement that such revenues will be collected within 24 months of the year-end in which the revenue is recorded. A reserve is recorded for amounts SJW Group estimates will not be collected within the 24-month period. This reserve is based on an estimate of actual usage over the recovery period, offset by applicable drought surcharges. In assessing the probability criteria for balancing and memorandum accounts between general rate cases, SJWC considers evidence that may exist prior to CPUC authorization that would satisfy ASC Topic 980 subtopic 340-25 recognition criteria. Such evidence may include regulatory rules and decisions, past practices, and other facts and circumstances that would indicate that recovery or refund is probable. When such evidence provides sufficient support, the balances are recorded in SJW Group’s consolidated financial statements.
Regulatory Assets and Liabilities Policy | Generally accepted accounting principles for water utilities include the recognition of regulatory assets and liabilities as permitted by ASC Topic 980. In accordance with ASC Topic 980, Water Utility Services, to the extent applicable, records deferred costs and credits on the balance sheet as regulatory assets and liabilities when it is probable that these costs and credits will be recognized in the ratemaking process in a period different from when the costs and credits are incurred. Accounting for such costs and credits is based on management’s judgment and prior historical ratemaking practices, and it occurs when management determines that it is probable that these costs and credits will be recognized in the future revenue of Water Utility Services through the ratemaking process. The regulatory assets and liabilities recorded by Water Utility Services primarily relate to the recognition of deferred income taxes for ratemaking versus tax accounting purposes, balancing and memorandum accounts, debt premiums related to business combinations, postretirement pension benefits, medical costs, accrued benefits for vacation and asset retirement obligations that have not yet been passed through in rates. For Connecticut and Maine water utility services, regulatory assets and liabilities also include deferred revenues associated with the WRA regulatory mechanism (see discussion in Regulatory and Rates Regulation section above). The company adjusts the related asset and liabilities for these items through its regulatory asset and liability accounts at year-end, except for certain postretirement benefit costs and balancing and memorandum accounts which are adjusted monthly. The company expects to recover regulatory assets related to plant depreciation income tax temporary differences over the average lives of the plant assets of between 5 to 75 years. Rate-regulated enterprises are required to charge a regulatory asset to earnings if and when that asset no longer meets the criteria for being recorded as a regulatory asset. SJW Group continually evaluates the recoverability of regulatory assets by assessing whether the amortization of the balance over the remaining life can be recovered through expected and undiscounted future cash flows.
Income Tax Policy | Income taxes are accounted for using the asset and liability method. Deferred tax assets and liabilities are recognized for the effect of temporary differences between financial and tax reporting. Deferred tax assets and liabilities are measured using current tax rates in effect. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date.
Regulatory Income Taxes Policy | To the extent permitted by the regulators, investment tax credits resulting from utility plant additions are deferred and amortized over the estimated useful lives of the related property.
Advances for Construction and Contributions in Aid of Construction Policy | Contributions in aid of construction represent funds received from developers that are not refundable under applicable regulations. Depreciation applicable to utility plant constructed with these contributions is charged to contributions in aid of construction. Customer advances and contributions in aid of construction received subsequent to 1986 and prior to June 12, 1996 generally must be included in federal taxable income, except for CTWS. Taxes paid relating to advances and contributions are recorded as deferred tax assets for financial reporting purposes and are amortized over 40 years for advances and over the tax depreciable life of the related asset for contributions. Receipts subsequent to June 12, 1996 are generally exempt from federal taxable income, unless specifically prescribed under treasury regulations, including CTWS. Advances and contributions received subsequent to 1991 and prior to 1997 are included in state taxable income, except for CTWS.
Asset Retirement Obligations Policy | SJW Group’s asset retirement obligation is recorded as a liability included in other non-current liabilities. It reflects principally the retirement costs of wells and other anticipated clean-up costs, which by law, must be remediated upon retirement. Retirement costs have historically been recovered through rates at the time of retirement. As a result, the liability is offset by a regulatory asset.
Revenue Recognition Policy | ASC Topic 606 - “Revenue from Contracts with Customers.” In accordance with Topic 606, management has determined that the company has principally four categories of revenues. The first category, revenue from contracts with customers, represents metered revenue of Water Utility Services which includes billings to customers based on meter readings plus an estimate of water used between the customers’ last meter reading and the end of the accounting period. SJW Group satisfies its performance obligation upon delivery of water to the customer at which time the customer consumes the benefits provided by the company. The customer is typically billed on a quarterly or bi-monthly basis after water delivery has occurred. The customer is charged both a service charge which is based upon meter size and covers a portion of the fixed costs of furnishing water to the customer and a consumption charge based on actual water usage. Unbilled revenue from the last meter reading date to the end of the accounting period is estimated based on the most recent usage patterns, production records and the effective tariff rates. As the company has the right to bill for services that it has provided, SJW Group estimates the dollar value of deliveries during the unbilled period and recognizes the associated revenue. Actual results could differ from those estimates, which may result in an adjustment to revenue when billed in a subsequent period. The second category, rental income, represents lease rental income from SJW Land Company and Chester Realty, Inc. tenants. The tenants pay monthly in accordance with lease agreements and SJW Group recognizes the income ratably over the lease term as this is the most representative of the pattern in which the benefit is expected to be derived from SJW Group’s underlying asset. The third and fourth revenue categories are other balancing and memorandum accounts and alternative revenue programs. Both are scoped out of Topic 606 and are accounted for under FASB ASC Topic 980 - “Regulated Operations.” Balancing and memorandum accounts are recognized by SJWC when it is probable that future recovery of previously incurred costs or future refunds that are to be credited to customers will occur through the ratemaking process. In addition, in the case of special revenue programs, SJWC, Connecticut Water, and HVWC follow the requirements of ASC Topic 980-605-25, “Alternative Revenue Programs” in determining revenue recognition, including the requirement that such revenues will be collected within 24 months of the year-end in which the revenue is recorded. A reserve is recorded for amounts SJW Group estimates will not be collected within the 24-month period. This reserve is based on an estimate of actual usage over the recovery period, offset by applicable drought surcharges. In assessing the probability criteria for balancing and memorandum accounts between general rate cases, SJWC considers evidence that may exist prior to CPUC authorization that would satisfy ASC Topic 980 subtopic 340-25 recognition criteria. Such evidence may include regulatory rules and decisions, past practices, and other facts and circumstances that would indicate that recovery or refund is probable. When such evidence provides sufficient support, the balances are recorded in SJW Group’s financial statements.
Share-based Payment Policy | SJW Group calculates the fair value of service-based and performance-based restricted stock awards based on the grant date fair market value of the company’s stock price reduced by the present value of the dividends expected to be declared on outstanding shares. SJW Group utilizes the Monte Carlo valuation model, which requires the use of subjective assumptions, to compute the fair value of market-vesting restricted stock units. The compensation cost for service-based restricted stock awards are charged to income on a straight-line basis over the requisite service period, which is the vesting period. For performance-based stock awards, compensation expense is charged to income on a straight-line basis over the requisite service period based on expected attainment of performance targets. Changes in the estimates of the expected attainment of performance targets will result in a change in the number of shares that are expected to vest which may cause a cumulative catch up for the amount of share-based compensation expense during each reporting period in which such estimates are altered. Forfeitures are accounted for as they occur.
Maintenance Expense Policy | Planned major maintenance projects are charged to expense as incurred.
Earnings Per Share Policy | Basic earnings per share is calculated using income available to common stockholders, divided by the weighted average number of shares outstanding during the year. The two-class method in computing basic earnings per share is not used because the number of participating securities as defined in FASB ASC Topic 260—“Earnings Per Share” is not significant. The two-class method is an earnings allocation formula that determines earnings per share for each class of common stock and participating security. Diluted earnings per share is calculated using income available to common stockholders divided by the weighted average number of shares of common stock including both shares outstanding and shares potentially issuable in connection with deferred restricted common stock awards under SJW Group’s Long-Term Incentive Plan and shares potentially issuable under the Employee Stock Purchase Plans.

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