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Acquisitions (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 USD ($) entity | Dec. 31, 2014 USD ($)
Business Acquisition [Line Items] |  |
Number of businesses acquired | entity | 3 |
Titan Energy Worldwide Inc. [Member] |  |
Business Acquisition [Line Items] |  |
Business acquisition, effective date of acquisition | Dec. 02, 2014 |
Equity method investment, ownership percentage |  | 100.00%
Transaction costs incurred |  | $ 700
Harmonics Holdings Inc. [Member] |  |
Business Acquisition [Line Items] |  |
Business acquisition, effective date of acquisition | Jan. 16, 2015 |
Transaction costs incurred | $ 13 |
Pacific Power Systems Integration Inc. [Member] |  |
Business Acquisition [Line Items] |  |
Business acquisition, effective date of acquisition | Aug. 01, 2015 |
Transaction costs incurred | $ 43 |

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