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Business Segments: (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Details of reportable segment |  |  |  |  |  |
Operating revenues | $ 115,641 | $ 120,695 | $ 217,586 | $ 231,247 |  |
Operating income (loss) | 31,000 | 33,294 | 53,768 | 61,257 |  |
Interest expense, net | 5,655 | 5,628 | 11,170 | 11,219 |  |
Utility plant | 988,668 | 946,740 | 988,668 | 946,740 |  | 981,477
Depreciation and amortization expense | 10,525 | 9,768 | 21,055 | 19,584 | [1] |
Income tax expense (benefit) | 10,262 | 11,148 | 16,619 | 20,397 |  |
Capital additions | 15,089 | 22,910 | 35,620 | 41,189 |  |
GSWC |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |
Number of reportable segments |  |  | 2 |  |  |
Operating revenues | 94,560 | 92,466 | 175,773 | 172,433 |  |
Operating income (loss) | 28,575 | 28,958 | 49,005 | 52,554 |  |
Utility plant | 983,686 |  | 983,686 |  |  | 977,294
Depreciation and amortization expense | 10,232 | 9,484 | 20,472 | 19,006 |  |
Income tax expense (benefit) | 9,783 | 9,643 | 15,488 | 17,306 |  |
Depreciation on transportation equipment | 225 | 218 | 497 | 468 |  |
AWR |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |
Number of reportable segments |  |  | 3 |  |  |
Reportable Entities | GSWC | Water |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |
Operating revenues | 86,232 | 84,069 | 156,989 | 153,302 |  |
Operating income (loss) | 27,182 | 26,772 | 45,577 | 48,535 |  |
Interest expense, net | 5,271 | 5,208 | 10,439 | 10,402 |  |
Utility plant | 943,382 | 901,505 | 943,382 | 901,505 |  |
Depreciation and amortization expense | 9,634 | 8,909 | 19,197 | 17,839 | [1] |
Income tax expense (benefit) | 9,374 | 8,821 | 14,332 | 15,762 |  |
Capital additions | 14,327 | 22,263 | 33,651 | 40,141 |  |
Reportable Entities | GSWC | Electric |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |
Operating revenues | 8,328 | 8,397 | 18,784 | 19,131 |  |
Operating income (loss) | 1,393 | 2,186 | 3,428 | 4,019 |  |
Interest expense, net | 337 | 378 | 671 | 754 |  |
Utility plant | 40,304 | 40,993 | 40,304 | 40,993 |  |
Depreciation and amortization expense | 598 | 575 | 1,275 | 1,167 | [1] |
Income tax expense (benefit) | 409 | 822 | 1,156 | 1,544 |  |
Capital additions | 208 | 647 | 680 | 880 |  |
Reportable Entities | ASUS | Contracts |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |
Operating revenues | 21,081 | 28,229 | 41,813 | 58,814 |  |
Operating income (loss) | 2,425 | 4,343 | 4,809 | 8,710 |  |
Interest expense, net | 55 | 93 | 122 | 153 |  |
Utility plant | 4,982 | 4,242 | 4,982 | 4,242 |  |
Depreciation and amortization expense | 293 | 284 | 583 | 578 | [1] |
Income tax expense (benefit) | 923 | 1,628 | 1,746 | 3,294 |  |
Capital additions | 554 | 0 | 1,289 | 168 |  |
Intersegment Eliminations | AWR |  |  |  |  |  |
Details of reportable segment |  |  |  |  |  |
Operating revenues | 0 | 0 | 0 | 0 |  |
Operating income (loss) | 0 | (7) | (46) | (7) |  |
Interest expense, net | (8) | (51) | (62) | (90) |  |
Utility plant | 0 | 0 | 0 | 0 |  |
Depreciation and amortization expense | 0 | 0 | 0 | 0 | [1] |
Income tax expense (benefit) | (444) | (123) | (615) | (203) |  |
Capital additions | $ 0 | $ 0 | $ 0 |  |  |
[1] | Depreciation expense computed on GSWC’s transportation equipment of $225,000 and $218,000 for the three months ended June 30, 2014 and 2013, respectively, and $497,000 and $468,000 for the six months ended June 30, 2014 and 2013, respectively, is recorded in administrative and general expenses.

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