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Fair Value Measurements - Contingent Consideration Liabilities (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($)
Roll-forward of acquisition-related contingent consideration |
Fair value adjustments included in operating expenses | $ (800)
Fair value | Level 3 |
Roll-forward of acquisition-related contingent consideration |
Balance at beginning of period | 44,200
Fair value adjustments included in operating expenses | (800)
Balance at end of period | $ 43,400

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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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- Definition Fair value of contingent consideration in a business combination that is classified in shareholders' equity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + 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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