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Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward] |  |  |
Balance at beginning of period |  | $ 10,840 | $ 8,129
Acquisitions |  | 1,322 | 4,767
Payments |  | (2,719) | (3,963)
Accretion | [1] | 976 | 868
Fair value adjustments | [1] | 1,046 | 562
Balance at end of the period | [2] | 11,465 | 10,363
Less current portion in accrued expenses and other current liabilities |  | (4,984) | (2,681)
Total long-term portion in other long-term liabilities |  | 6,481 | $ 7,682
Contingent consideration, total remaining estimated payments |  | $ 14,000 |
[1] | Recorded in selling, general and administrative expense in the Condensed Consolidated Statements of Income
[2] | Amounts represent the fair value of estimated remaining payments. The total estimated remaining payments as of September 30, 2016 are $14.0 million. The liability for contingent consideration expires at various dates through September 2029. Certain of the contingent consideration arrangements are subject to a maximum payment amount, while the remaining arrangements have no maximum contingent consideration.

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- Definition Fair value, as of acquisition date, of potential payments under the contingent consideration arrangement including cash and shares. + References No definition available. + Details
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- Definition Business acquisition contingent consideration non-current + References No definition available. + Details
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- Definition Business combination contingent consideration liability fair value adjustments. + References No definition available. + Details
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- Definition Contingent consideration estimated payment. + References No definition available. + Details
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- Definition Payment of contingent consideration + References No definition available. + Details
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- Definition Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6394232&loc=d3e17558-110866 + Details
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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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