CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Income Statement [Abstract] | ||||
| Operating revenue | $ 250,229 | $ 240,550 | $ 643,996 | $ 606,404 |
| Production expenses: | ||||
| Purchased water | 50,360 | 38,163 | 116,953 | 101,537 |
| Power | 4,351 | 8,175 | 12,474 | 15,509 |
| Groundwater extraction charges | 36,020 | 39,608 | 87,848 | 84,253 |
| Other production expenses | 12,575 | 12,374 | 37,936 | 36,857 |
| Total production expenses | 103,306 | 98,320 | 255,211 | 238,156 |
| Administrative and general | 35,441 | 31,306 | 98,874 | 87,861 |
| Maintenance | 8,347 | 8,016 | 24,178 | 22,985 |
| Property taxes and other non-income taxes | 10,168 | 9,516 | 28,146 | 27,217 |
| Depreciation and amortization | 32,478 | 28,765 | 96,918 | 85,797 |
| Total operating expense | 189,740 | 175,923 | 503,327 | 462,016 |
| Operating income | 60,489 | 64,627 | 140,669 | 144,388 |
| Other (expense) income: | ||||
| Interest on long-term debt and other interest expense | (18,161) | (17,898) | (54,951) | (54,292) |
| Pension non-service credit | 1,975 | 1,587 | 5,906 | 4,810 |
| Other, net | 3,943 | 2,607 | 9,595 | 5,384 |
| Income before income taxes | 48,246 | 50,923 | 101,219 | 100,290 |
| Provision for income taxes | 5,202 | 5,791 | 12,573 | 13,932 |
| Net income | 43,044 | 45,132 | 88,646 | 86,358 |
| Comprehensive income | $ 43,044 | $ 45,132 | $ 88,646 | $ 86,358 |
| Earnings per share | ||||
| Basic (in usd per share) | $ 1.03 | $ 1.27 | $ 2.18 | $ 2.49 |
| Diluted (in usd per share) | 0.99 | 1.27 | 2.13 | 2.48 |
| Dividends per share (in usd per share) | $ 0.44 | $ 0.42 | $ 1.32 | $ 1.26 |
| Weighted average shares outstanding | ||||
| Basic (in shares) | 41,959,732 | 35,543,224 | 40,594,395 | 34,706,183 |
| Diluted (in shares) | 43,478,365 | 35,643,826 | 41,644,367 | 34,797,374 |
| X | ||||||||||
- Definition Groundwater Extraction Charges No definition available.
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- Definition Water Production Costs [Abstract] No definition available.
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Cost of water purchased, may include any water related assessment. If water is bought on a unit volume basis, would also be considered as commodity costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of operating expense of regulated operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of operating expense for depreciation and amortization of regulated operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of operating expense for routine plant maintenance and repairs of regulated operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of other operating expense of regulated operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of operating expense for purchased power of regulated operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of operating expense for taxes other than income taxes of regulated operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Cost incurred related to water production and may include cost of treatment plants, pumps, pipes and reservoir, purchased water, power and pump taxes as well as the cost of reducing water leakage. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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