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Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2017
Segment Reporting [Abstract] |
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 March 31,
| 2017 |  | 2016
| (in thousands)
Revenues |  |  |
Electricity | $ | 238,751 |  |  | $ | 217,295 |
Gas | 124,211 |  |  | 139,256 |
Water | 114,630 |  |  | 141,039 |
Total Company | $ | 477,592 |  |  | $ | 497,590 |
Gross profit |  |  |
Electricity | $ | 67,192 |  |  | $ | 64,586 |
Gas | 50,504 |  |  | 48,577 |
Water | 39,529 |  |  | 50,040 |
Total Company | $ | 157,225 |  |  | $ | 163,203 |
Operating income (loss) |  |  |
Electricity | $ | 16,862 |  |  | $ | 10,632 |
Gas | 21,256 |  |  | 16,299 |
Water | 8,735 |  |  | 18,076 |
Corporate unallocated | (16,811 | ) |  | (21,433 | )
Total Company | 30,042 |  |  | 23,574 |
Total other income (expense) | (4,981 | ) |  | (4,164 | )
Income before income taxes | $ | 25,061 |  |  | $ | 19,410 |
Revenues By Region [Table Text Block] | Revenues by region were as follows:
| Three Months Ended March 31,
| 2017 |  | 2016
| (in thousands)
United States and Canada | $ | 269,097 |  |  | $ | 262,037 |
Europe, Middle East, and Africa | 162,815 |  |  | 195,710 |
Other(1) | 45,680 |  |  | 39,843 |
Total revenues | $ | 477,592 |  |  | $ | 497,590 |
(1) | The Other region includes our operations in Latin America and Asia Pacific.
Depreciation And Amortization Expense Associated With Segments [Table Text Block] | Depreciation and amortization expense associated with our segments was as follows:
| Three Months Ended March 31,
| 2017 |  | 2016
| (in thousands)
Electricity | $ | 5,311 |  |  | $ | 7,262 |
Gas | 4,244 |  |  | 4,921 |
Water | 3,959 |  |  | 4,382 |
Corporate unallocated | 864 |  |  | 109 |
Total Company | $ | 14,378 |  |  | $ | 16,674 |

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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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