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Goodwill and Identifiable Intangible Assets, Net (Details 2) (USD $) In Thousands, unless otherwise specified |  |  |  |  | 9 Months Ended |  |  | 9 Months Ended |  |  | 9 Months Ended |  |  | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 Customer relationships | Dec. 31, 2012 Customer relationships | Sep. 30, 2013 Customer relationships Minimum | Sep. 30, 2013 Customer relationships Maximum | Sep. 30, 2013 Backlog | Dec. 31, 2012 Backlog | Sep. 30, 2013 Backlog Minimum | Sep. 30, 2013 Backlog Maximum | Sep. 30, 2013 Noncompete agreements | Dec. 31, 2012 Noncompete agreements | Sep. 30, 2013 Noncompete agreements Minimum | Sep. 30, 2013 Noncompete agreements Maximum | Sep. 30, 2013 Tradenames | Dec. 31, 2012 Tradenames | Sep. 30, 2013 Tradenames Minimum | Sep. 30, 2013 Tradenames Maximum
Identifiable Intangible Assets, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Lives in Years |  |  |  |  | 1 year | 15 years |  |  | 1 year | 2 years |  |  | 2 years | 7 years |  |  | 2 years | 25 years
Gross Book Value | $ 73,504 | $ 73,504 | $ 40,404 | $ 40,404 |  |  | $ 6,515 | $ 6,515 |  |  | $ 2,890 | $ 2,890 |  |  | $ 23,695 | $ 23,695 |  |
Accumulated Amortization | $ (34,397) | $ (28,989) | $ (19,639) | $ (15,579) |  |  | $ (6,515) | $ (6,375) |  |  | $ (2,594) | $ (2,380) |  |  | $ (5,649) | $ (4,655) |  |

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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 Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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