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Goodwill and Intangible Assets (Weighted Average Amortization Period by Intangible Asset Class) (Details) | 9 Months Ended
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Sep. 30, 2018
Acquired Finite-Lived Intangible Assets [Line Items] |
Weighted Average Remaining Amortization Period | 6 years 8 months
Customer relationships |
Acquired Finite-Lived Intangible Assets [Line Items] |
Weighted Average Remaining Amortization Period | 7 years 8 months
Technology |
Acquired Finite-Lived Intangible Assets [Line Items] |
Weighted Average Remaining Amortization Period | 4 years 5 months
Trademarks and trade names |
Acquired Finite-Lived Intangible Assets [Line Items] |
Weighted Average Remaining Amortization Period | 5 years 1 month
Covenants not to compete |
Acquired Finite-Lived Intangible Assets [Line Items] |
Weighted Average Remaining Amortization Period | 2 years 3 months

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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