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v3.19.3.a.u2

Business Segments (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  | $ 112,993 | $ 134,496 | $ 124,647 | $ 101,733 | $ 111,005 | $ 124,182 | $ 106,901 | $ 94,728 | $ 473,869 | $ 436,816 | $ 440,603
Operating Income |  | 24,724 | 42,724 | 39,430 | 20,195 | 22,749 | 33,975 | 25,568 | 18,691 | 127,073 | 100,983 | 127,095
Interest expense, net |  |  |  |  |  |  |  |  |  | (21,337) | (19,855) | (20,792)
Net utility plant |  | 1,415,705 |  |  |  | 1,296,310 |  |  |  | 1,415,705 | 1,296,310 | 1,204,992
Depreciation and amortization expense | [1] |  |  |  |  |  |  |  |  | 35,397 | 40,425 | 39,031
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 24,670 | 18,017 | 38,974
Capital additions |  |  |  |  |  |  |  |  |  | $ 151,940 | 126,561 | 113,126
Parent Company |  |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  |  | 3 |  |
Operating revenues |  |  |  |  |  |  |  |  |  | $ 0 | 0 | 0
Operating Income |  |  |  |  |  |  |  |  |  | (9) | 7 | (96)
Interest expense, net |  |  |  |  |  |  |  |  |  | (539) | (451) | (248)
Net utility plant |  | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Depreciation and amortization expense | [1] |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | (709) | (525) | (2,221)
Capital additions |  |  |  |  |  |  |  |  |  | $ 0 | 0 | 0
GSWC |  |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  |  | 2 |  |
Operating revenues |  | 81,233 | 107,245 | 95,548 | 75,352 | 75,226 | 95,564 | 84,574 | 74,244 | $ 359,378 | 329,608 | 340,301
Operating Income |  | 18,746 | $ 36,982 | $ 34,037 | $ 15,327 | 14,080 | $ 27,540 | $ 22,645 | $ 16,297 | 105,092 | 80,562 | 105,871
Net utility plant |  | 1,394,742 |  |  |  | 1,281,092 |  |  |  | 1,394,742 | 1,281,092 |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  | 32,441 | 38,395 | 37,852
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 20,177 | 13,603 | 34,059
GSWC | Water Service Utility Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 319,830 | 295,258 | 306,332
Operating Income |  |  |  |  |  |  |  |  |  | 93,895 | 74,342 | 98,678
Interest expense, net |  |  |  |  |  |  |  |  |  | (20,304) | (18,403) | (18,909)
Net utility plant |  | 1,322,062 |  |  |  | 1,218,468 |  |  |  | 1,322,062 | 1,218,468 | 1,137,995
Depreciation and amortization expense | [1] |  |  |  |  |  |  |  |  | 29,956 | 36,137 | 35,706
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 17,295 | 12,391 | 32,212
Capital additions |  |  |  |  |  |  |  |  |  | 131,353 | 110,934 | 104,546
GSWC | Electric: |  |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 39,548 | 34,350 | 33,969
Operating Income |  |  |  |  |  |  |  |  |  | 11,197 | 6,220 | 7,193
Interest expense, net |  |  |  |  |  |  |  |  |  | (1,228) | (1,328) | (1,380)
Net utility plant |  | 72,680 |  |  |  | 62,624 |  |  |  | 72,680 | 62,624 | 59,945
Depreciation and amortization expense | [1] |  |  |  |  |  |  |  |  | 2,485 | 2,258 | 2,146
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 2,882 | 1,212 | 1,847
Capital additions |  |  |  |  |  |  |  |  |  | 11,499 | 5,420 | 5,941
American States Utility Services [Member] | Contracted services: |  |  |  |  |  |  |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  | 114,491 | 107,208 | 100,302
Operating Income |  |  |  |  |  |  |  |  |  | 21,990 | 20,414 | 21,320
Interest expense, net |  |  |  |  |  |  |  |  |  | 734 | 327 | (255)
Net utility plant |  | $ 20,963 |  |  |  | $ 15,218 |  |  |  | 20,963 | 15,218 | 7,052
Depreciation and amortization expense | [1] |  |  |  |  |  |  |  |  | 2,956 | 2,030 | 1,179
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 5,202 | 4,939 | 7,136
Capital additions |  |  |  |  |  |  |  |  |  | $ 9,088 | $ 10,207 | $ 2,639
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases |  |  |  |  |  |  |  |  |  | 50 years |  |
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