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Acquisitions (Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 454	$ 434
Harmonics Holdings Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	995
Amortization of intangibles	23
Harmonics Holdings Incorporated [Member] | Technology Related Industry Accreditations [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	83
Pacific Power Systems Integration Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	1,500
Amortization of intangibles	18
Pacific Power Systems Integration Incorporated [Member] | Technology Related Industry Accreditations [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 1,000
Customer Relationships [Member] | Harmonics Holdings Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	10 years
Finite-lived intangible assets acquired	$ 319
Customer Relationships [Member] | Pacific Power Systems Integration Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	7 years
Finite-lived intangible assets acquired	$ 400
Noncompete Agreements [Member] | Harmonics Holdings Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	5 years
Finite-lived intangible assets acquired	$ 75
Noncompete Agreements [Member] | Pacific Power Systems Integration Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	7 years
Finite-lived intangible assets acquired	$ 100
Developed Technology [Member] | Harmonics Holdings Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization period of identifiable intangible assets	10 years
Finite-lived intangible assets acquired	$ 492
Trademarks [Member] | Harmonics Holdings Incorporated [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 26

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+ References

No definition available.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

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