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Fair Value Measurements Reconciliation of Fair Value Measurements of Liability for Future Consideration Payments (Details) - Acquisition-related Future Consideration Liabilities [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance |  | $ 1,909 | $ 6,489 | $ 11,759
New acquisition adjustment | [1] | 2,090 | 0 | 330
Changes in fair value | [2] | 415 | (1,589) | (941)
Contingent consideration payments |  | (2,253) | (2,991) | (4,659)
Ending balance |  | $ 2,161 | $ 1,909 | $ 6,489
[1] | Amounts include the preliminary fair value estimate of the contingent payment liability recorded in connection with new acquisitions or the revision thereof upon finalization of the valuation process related to initial purchase accounting.
[2] | Amounts were included as Operating Expenses – Other on the Consolidated Statements of Income.

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- Definition This element represents payments for contingent consideration, a liability measured at fair value using significiant unobservable inputs (Level 3). + References No definition available. + Details
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- Definition This element represents the adjustment for a new acquisition to future consideration payments, a liability measured at fair value using significant unobservable inputs (Level 3) + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Details
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- Details
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