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Goodwill (Text Block) | 12 Months Ended
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Dec. 31, 2016
Goodwill Excluding Non Goodwill Intangibles [Abstract] |
Goodwill Disclosure [Text Block] | Goodwill The following table reflects goodwill allocated to each reporting segment at December 31, 2016 and 2015:
| Electricity |  | Gas |  | Water |  | Total Company
| (in thousands)
Goodwill balance at January 1, 2015 |  |  |  |  |  |  |
Goodwill before impairment | $ | 449,668 |  |  | $ | 359,485 |  |  | $ | 382,655 |  |  | $ | 1,191,808 |
Accumulated impairment losses | (393,981 | ) |  | — |  |  | (297,007 | ) |  | (690,988 | )
Goodwill, net | 55,687 |  |  | 359,485 |  |  | 85,648 |  |  | 500,820 |
Goodwill acquired | — |  |  | — |  |  | 4,684 |  |  | 4,684 |
Effect of change in exchange rates | (2,954 | ) |  | (28,049 | ) |  | (6,379 | ) |  | (37,382 | )
Goodwill balance at December 31, 2015 |  |  |  |  |  |  |
Goodwill before impairment | 414,910 |  |  | 331,436 |  |  | 350,314 |  |  | 1,096,660 |
Accumulated impairment losses | (362,177 | ) |  | — |  |  | (266,361 | ) |  | (628,538 | )
Goodwill, net | 52,733 |  |  | 331,436 |  |  | 83,953 |  |  | 468,122 |
Effect of change in exchange rates | (1,360 | ) |  | (11,523 | ) |  | (2,745 | ) |  | (15,628 | )
Goodwill balance at December 31, 2016 |  |  |  |  |  |  |
Goodwill before impairment | 400,299 |  |  | 319,913 |  |  | 334,505 |  |  | 1,054,717 |
Accumulated impairment losses | (348,926 | ) |  | — |  |  | (253,297 | ) |  | (602,223 | )
Goodwill, net | $ | 51,373 |  |  | $ | 319,913 |  |  | $ | 81,208 |  |  | $ | 452,494 |
During our 2016 and 2015 annual goodwill impairment test, performed as of October 1, 2016 and 2015, respectively, we performed the first step of the quantitative impairment test for Electricity, Gas, and Water and determined that the fair value of each of the reporting units exceeded their carrying values. No goodwill impairment was required to be recognized as the result of this quantitative analysis. Refer to Note 1 for a description of our reporting units and the methods used to determine the fair values of our reporting units and to determine the amount of any goodwill impairment.

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- Definition Goodwill, excluding non-goodwill intangible assets [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for goodwill. + References No definition available. + Details
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