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Goodwill and Other Intangible Assets - Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  | 9 Months Ended |  |  | 9 Months Ended |  |  |  | 9 Months Ended | 12 Months Ended |
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Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Customer Relationships [Member] | Dec. 31, 2013 Customer Relationships [Member] | Sep. 30, 2014 Customer Relationships [Member] Minimum [Member] | Sep. 30, 2014 Customer Relationships [Member] Maximum [Member] | Sep. 30, 2014 Acquired technology [Member] | Dec. 31, 2013 Acquired technology [Member] | Sep. 30, 2014 Acquired technology [Member] Minimum [Member] | Sep. 30, 2014 Acquired technology [Member] Maximum [Member] | Sep. 30, 2014 Patents [Member] | Dec. 31, 2013 Patents [Member] | Sep. 30, 2014 Trade Names [Member] | Dec. 31, 2013 Trade Names [Member] | Sep. 30, 2014 Trade Names [Member] Minimum [Member] | Sep. 30, 2014 Trade Names [Member] Maximum [Member] | Dec. 31, 2013 Noncompete Agreements [Member] | Sep. 30, 2014 Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Gross | $ 96,553 | $ 90,753 | $ 60,062 | $ 54,730 |  |  | $ 27,580 | $ 27,580 |  |  | $ 1,658 | $ 1,493 | $ 7,193 | $ 6,890 |  |  | $ 60 | $ 60
Finite-Lived Intangible Assets, Accumulated Amortization | 12,478 | 9,151 | 6,919 | 5,236 |  |  | 3,700 | 2,598 |  |  | 338 | 254 | 1,461 | 1,003 |  |  | 60 | 60
Finite-Lived Intangible Assets, Net | $ 84,075 | $ 81,602 | $ 53,143 | $ 49,494 |  |  | $ 23,880 | $ 24,982 |  |  | $ 1,320 | $ 1,239 | $ 5,732 | $ 5,887 |  |  | $ 0 | $ 0
Finite-Lived Intangible Asset, Useful Life |  |  |  |  | 5 years | 30 years |  |  | 3 years | 20 years | 20 years |  |  |  | 3 years | 12 years | 3 years |

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- Definition 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 + Details
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- Definition Amount before 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 + Details
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- Definition Amount after 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 + Details
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