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Fair Value Measurements - Earn-out Obligation Measured on Recurring Basis (Details) - Level 3 - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | $ 36,700 | $ 0
Acquisition date fair value of contingent consideration |  | 34,800
Earn-out payments | (31,700) |
Fair value adjustment included in costs and operating expenses | (5,000) | 1,900
Reclassification from long-term to current | 0 | 0
Ending balance | 0 | 36,700
Other current assets |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 31,700 | 0
Acquisition date fair value of contingent consideration |  | 34,800
Earn-out payments | (31,700) |
Fair value adjustment included in costs and operating expenses | (5,000) | 1,900
Reclassification from long-term to current | 5,000 | (5,000)
Ending balance | 0 | 31,700
Long-term Portion |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 5,000 | 0
Acquisition date fair value of contingent consideration |  | 0
Earn-out payments | 0 |
Fair value adjustment included in costs and operating expenses | 0 | 0
Reclassification from long-term to current | (5,000) | 5,000
Ending balance | $ 0 | $ 5,000

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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 gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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