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Business and Basis of Presentation - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 31, 2021 USD ($) | Jun. 30, 2021 USD ($) country enterprise | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) country enterprise segment | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |  |  |
Number of organizations Company serves | enterprise |  | 14,000 |  | 14,000 |  |  |
Number of countries in which entity operates | country |  | 100 |  | 100 |  |  |
Number of reportable segments | segment |  |  |  | 3 |  |  |
Cash and cash equivalents, and restricted cash |  | $ 800,457 | $ 356,633 | $ 800,457 | $ 356,633 | $ 712,583 | $ 280,836
Cash and cash equivalents |  | 796,257 |  | 796,257 |  | $ 712,583 |
Restricted cash |  | 4,200 |  | 4,200 |  |  |
Proceeds from event cancellation insurance claims | $ 150,000 |  |  |  |  |  |
Gain on event cancellation insurance claims | $ 135,500 | $ 135,545 | $ 0 | $ 135,545 | $ 0 |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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