| Revenues Gross Profit And Operating Income By Segment [Table Text Block] |
Revenues, gross profit, and operating income associated with our segments were as follows: | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2014 | | 2013 | | 2014 | | 2013 | | (in thousands) | Revenues | | | | | | | | Electricity | $ | 203,441 |
| | $ | 216,615 |
| | $ | 567,414 |
| | $ | 605,990 |
| Gas | 149,276 |
| | 143,240 |
| | 449,707 |
| | 416,166 |
| Water | 143,737 |
| | 135,636 |
| | 443,481 |
| | 403,046 |
| Total Company | $ | 496,454 |
| | $ | 495,491 |
| | $ | 1,460,602 |
| | $ | 1,425,202 |
| | | | | | | | | Gross profit | | | | | | | | Electricity | $ | 45,959 |
| | $ | 47,637 |
| | $ | 141,675 |
| | $ | 155,094 |
| Gas | 53,492 |
| | 55,303 |
| | 168,609 |
| | 156,073 |
| Water | 51,311 |
| | 47,144 |
| | 158,054 |
| | 138,628 |
| Total Company | $ | 150,762 |
| | $ | 150,084 |
| | $ | 468,338 |
| | $ | 449,795 |
| | | | | | | | | Operating income (loss) | | | | | | | | Electricity | $ | (11,196 | ) | | $ | (33,756 | ) | | $ | (35,412 | ) | | $ | (56,923 | ) | Gas | 23,836 |
| | 24,472 |
| | 73,889 |
| | 62,883 |
| Water | 19,157 |
| | 17,225 |
| | 60,319 |
| | 45,189 |
| Corporate unallocated | (15,339 | ) | | (14,429 | ) | | (45,872 | ) | | (37,314 | ) | Total Company | 16,458 |
| | (6,488 | ) | | 52,924 |
| | 13,835 |
| Total other income (expense) | (4,421 | ) | | (2,859 | ) | | (13,966 | ) | | (8,837 | ) | Income before income taxes | $ | 12,037 |
| | $ | (9,347 | ) | | $ | 38,958 |
| | $ | 4,998 |
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| Revenues By Region [Table Text Block] |
Revenues by region were as follows: | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2014 | | 2013 | | 2014 | | 2013 | | (in thousands) | United States and Canada | $ | 237,684 |
| | $ | 227,784 |
| | $ | 652,390 |
| | $ | 616,555 |
| Europe, Middle East, and Africa | 201,673 |
| | 208,546 |
| | 641,434 |
| | 635,691 |
| Other | 57,097 |
| | 59,161 |
| | 166,778 |
| | 172,956 |
| Total revenues | $ | 496,454 |
| | $ | 495,491 |
| | $ | 1,460,602 |
| | $ | 1,425,202 |
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| Depreciation And Amortization Expense Associated With Segments [Table Text Block] |
Depreciation and amortization expense associated with our segments was as follows: | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2014 | | 2013 | | 2014 | | 2013 | | (in thousands) | Electricity | $ | 11,596 |
| | $ | 11,740 |
| | $ | 36,754 |
| | $ | 35,084 |
| Gas | 6,486 |
| | 6,736 |
| | 19,590 |
| | 20,211 |
| Water | 6,466 |
| | 6,201 |
| | 18,679 |
| | 18,379 |
| Corporate Unallocated | 79 |
| | 41 |
| | 210 |
| | 75 |
| Total Company | $ | 24,627 |
| | $ | 24,718 |
| | $ | 75,233 |
| | $ | 73,749 |
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