v3.22.0.1

Investments - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items] |  |  |
Allowance for credit loss, available-for-sale debt securities | $ 0 | $ 0 |
Debt securities in an unrealized loss position | 801,500,000 | 229,700,000 | $ 139,700,000
Debt Securities, Unrealized Gain (Loss) | 3,500,000 | 1,700,000 | 0
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | 0 | 0 | 0
Available-for-sale non-marketable debt securities, impairment charge | 0 | 0 | 18,000,000
Equity securities with readily determinable fair value | 0 | 155,200,000 |
Equity securities without readily determinable fair value, carrying value | 74,993,000 | 78,074,000 | 131,210,000
Impairment of investments | 3,081,000 | 82,125,000 | 27,751,000
Unrealized gain (loss) on marketable equity securities |  | (21,700,000) | 13,200,000
Realized loss on marketable equity securities | (13,400,000) |  |
Cost-method Investments |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment of investments | $ 3,100,000 | $ 53,100,000 | $ 0

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