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Summary of Significant Accounting Policies, Reclassifications (Details) - Reclassification Adjustment [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2021
General and Administration Expenses [Member] |  |
Reclassifications [Abstract] |  |
Events and other miscellaneous selling costs | $ (4.6) | $ (9.5)
Selling Expenses [Member] |  |
Reclassifications [Abstract] |  |
Events and other miscellaneous selling costs | $ 4.6 | $ 9.5

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- Definition Amount of selling and marketing expense classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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- Details
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- Details
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- Details
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