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v3.10.0.1

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 08, 2017 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating revenues |  | $ 111,005 | $ 124,182 | $ 106,901 | $ 94,728 | $ 104,180 | $ 124,418 | $ 113,195 | $ 98,810 | $ 436,816 | $ 440,603 | $ 436,087
Operating income (loss) |  | 22,749 | 33,975 | 25,568 | 18,691 | 21,959 | 38,534 | 42,026 | 24,576 | 100,983 | 127,095 | 114,192
Net Income |  | $ 13,789 | $ 22,952 | $ 16,348 | $ 10,782 | $ 12,868 | $ 21,006 | $ 22,792 | $ 12,701 | $ 63,871 | $ 69,367 | $ 59,743
Earnings Per Share, Basic |  | $ 0.37 | $ 0.62 | $ 0.44 | $ 0.29 | $ 0.35 | $ 0.57 | $ 0.62 | $ 0.35 | $ 1.73 | $ 1.88 | $ 1.63
Earnings Per Share, Diluted |  | $ 0.37 | $ 0.62 | $ 0.44 | $ 0.29 | $ 0.35 | $ 0.57 | $ 0.62 | $ 0.34 | $ 1.72 | $ 1.88 | $ 1.62
Gain on sale of assets | $ 8,300 |  |  |  |  |  |  |  |  |  |  |
GSWC |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ 75,226 | $ 95,564 | $ 84,574 | $ 74,244 | $ 75,136 | $ 99,913 | $ 88,346 | $ 76,906 | $ 329,608 | $ 340,301 | $ 338,702
Operating income (loss) |  | 14,080 | 27,540 | 22,645 | 16,297 | 15,780 | 32,986 | 35,229 | 21,876 | 80,562 | 105,871 | 95,187
Net Income |  | $ 7,555 | $ 17,919 | $ 13,648 | $ 8,890 | $ 7,309 | $ 17,336 | 18,363 | $ 10,749 | $ 48,012 | 53,757 | $ 46,969
Gain on sale of assets |  |  |  |  |  |  |  | 8,300 |  |  |  |
Cash received for reimbursement of legal and other defense costs |  |  |  |  |  |  |  |  |  |  | $ (1,800) |
Restatement Adjustment | American States Utility Services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  | $ 1,000 |  |  |  |

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