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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Income Statement [Abstract] |  |  |  |
Operating revenue | $ 254,976 | $ 266,307 | $ 580,120 | $ 645,494
Operations: |  |  |  |
Water production costs | 92,347 | 88,750 | 218,222 | 221,195
Administrative and general | 34,216 | 33,328 | 105,177 | 99,425
Other operations | 32,331 | 26,676 | 74,758 | 81,945
Maintenance | 8,930 | 8,433 | 24,063 | 23,389
Depreciation and amortization | 29,897 | 28,844 | 89,636 | 86,387
Income tax expense (benefit) | 3,949 | 5,890 | (1,366) | 5,927
Property and other taxes | 9,832 | 9,440 | 27,731 | 25,853
Total operating expenses | 211,502 | 201,361 | 538,221 | 544,121
Net operating income | 43,474 | 64,946 | 41,899 | 101,373
Other income and expenses: |  |  |  |
Non-regulated revenue | 4,535 | 4,573 | 13,643 | 16,772
Non-regulated expenses | (5,992) | (6,905) | (11,224) | (22,432)
Other components of net periodic benefit credit | 4,776 | 3,737 | 14,753 | 11,516
Allowance for equity funds used during construction | 1,387 | 1,004 | 4,146 | 3,021
Income tax expense on other income and expenses | (1,063) | (353) | (4,302) | (1,210)
Net other income | 3,643 | 2,056 | 17,016 | 7,667
Interest expense: |  |  |  |
Interest expense | 13,482 | 11,891 | 39,791 | 34,972
Allowance for borrowed funds used during construction | (690) | (572) | (2,314) | (1,724)
Net interest expense | 12,792 | 11,319 | 37,477 | 33,248
Net income | 34,325 | 55,683 | 21,438 | 75,792
Net loss attributable to noncontrolling interests | (113) | (189) | (345) | (650)
Net income attributable to California Water Service Group | $ 34,438 | $ 55,872 | $ 21,783 | $ 76,442
Earnings per share of common stock: |  |  |  |
Basic (in dollars per share) | $ 0.60 | $ 1.03 | $ 0.38 | $ 1.41
Diluted (in dollars per share) | $ 0.60 | $ 1.03 | $ 0.38 | $ 1.41
Weighted average shares outstanding: |  |  |  |
Basic (in shares) | 57,704 | 54,007 | 56,695 | 54,063
Diluted (in shares) | 57,740 | 54,042 | 56,731 | 54,104

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