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Business Combinations Revenue and Earnings Attributed to Business Combination (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2018 | Mar. 31, 2017
Business Acquisition [Line Items] |  |  |
Revenue, Net | $ 607,221 |  | $ 477,592
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ (145,270) |  | 16,014
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  | $ 85,833 |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  | $ (29,753) |
Comverge [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Business Acquisition, Pro Forma Revenue |  |  | 491,762
Business Acquisition, Pro Forma Net Income (Loss) |  |  | $ 15,107

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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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