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Investments and Fair Value Measurements - Investment Category and Length (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) company | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) company
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract] |  |  |
Fair value, in loss position less than twelve months | $ 11,447 |  | $ 12,151
Gross unrealized (loss), in loss position less than twelve months | (229) |  | (61)
Fair value, in loss position greater than twelve months | 3,002 |  | 2,013
Gross unrealized (loss), in loss position greater than twelve months | (7) |  | (4)
Fair value, total in loss position | 14,449 |  | 14,164
Gross unrealized (loss), total in loss position | (236) |  | (65)
Minority Investments |  |  |
Investments, equity method | $ 11,312 |  | $ 10,166
Number of equity method investments | company | 5 |  | 5
Impairment charge | $ 0 | $ 0 |
Certificates of Deposit [Member] |  |  |
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract] |  |  |
Fair value, in loss position less than twelve months | 6,590 |  | $ 6,181
Gross unrealized (loss), in loss position less than twelve months | (90) |  | (19)
Fair value, total in loss position | 6,590 |  | 6,181
Gross unrealized (loss), total in loss position | (90) |  | (19)
Corporate Bonds [Member] |  |  |
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract] |  |  |
Fair value, in loss position less than twelve months | 4,857 |  | 5,970
Gross unrealized (loss), in loss position less than twelve months | (139) |  | (42)
Fair value, in loss position greater than twelve months | 3,002 |  | 2,013
Gross unrealized (loss), in loss position greater than twelve months | (7) |  | (4)
Fair value, total in loss position | 7,859 |  | 7,983
Gross unrealized (loss), total in loss position | (146) |  | (46)
Other Assets [Member] |  |  |
Minority Investments |  |  |
Investments, equity method | $ 11,300 |  | $ 10,200

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