Goodwill and Intangible Assets - Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 96,597	$ 96,495
Finite-Lived Intangible Assets, Accumulated Amortization	(15,318)	(13,828)
Total intangibles assets, net carrying amount	81,279us-gaap_FiniteLivedIntangibleAssetsNet	82,667us-gaap_FiniteLivedIntangibleAssetsNet
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	60,150	60,150
Finite-Lived Intangible Assets, Accumulated Amortization	(8,804)	(7,919)
Total intangibles assets, net carrying amount	51,346	52,231
Acquired Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	27,580	27,580
Finite-Lived Intangible Assets, Accumulated Amortization	(4,435)	(4,068)
Total intangibles assets, net carrying amount	23,145	23,512
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,110	7,110
Finite-Lived Intangible Assets, Accumulated Amortization	(1,777)	(1,576)
Total intangibles assets, net carrying amount	5,333	5,534
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,757	1,655
Finite-Lived Intangible Assets, Accumulated Amortization	(302)	(265)
Total intangibles assets, net carrying amount	$ 1,455	$ 1,390
Useful Life	20 years	20 years
Maximum [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	30 years	30 years
Maximum [Member] \| Acquired Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	20 years	20 years
Maximum [Member] \| Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	12 years	12 years
Minimum [Member] \| Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years	5 years
Minimum [Member] \| Acquired Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	3 years	3 years
Minimum [Member] \| Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	1 year	3 years

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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+ References

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+ References

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+ References

No definition available.

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