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Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Goodwill And Other Intangible Assets [Line Items] |  |  |
Purchased software costs, capitalized | $ 3,720 | $ 1,856 | $ 934
Minimum [Member] | Customer Relationships [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 10 years |  |
Minimum [Member] | Purchased Software Costs [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 2 years |  |
Maximum [Member] | Customer Relationships [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 14 years |  |
Maximum [Member] | Purchased Software Costs [Member] |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Estimated useful life | 10 years |  |

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- Definition Goodwill And Other Intangible Assets [Line Items] + References No definition available. + 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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- Definition The cash outflow associated with the development, modification or acquisition of software programs or applications for internal use (that is, not to be sold, leased or otherwise marketed to others) that qualify for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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