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Equity and Long-term Investments and Fair Value Measurements - Available-for-Sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Available-for-Sale Securities |  |  |
Amortized Cost |  | $ 75,426 | $ 263,469
Gross Unrealized Gains |  | 0 | 0
Gross Unrealized Losses |  | 0 | 0
Estimated Fair Value |  | 75,426 | 263,469
Credit loss |  | 0 |
Money market funds |  |  |
Available-for-Sale Securities |  |  |
Amortized Cost | [1] | 75,426 | 263,469
Gross Unrealized Gains | [1] | 0 | 0
Gross Unrealized Losses | [1] | 0 | 0
Estimated Fair Value | [1] | $ 75,426 | $ 263,469
[1] | (1) Money market funds are included in cash and cash equivalents in the condensed consolidated balance sheets.

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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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