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Financial Instruments - Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Investments, All Other Investments [Abstract]    
Cash and Cash Equivalents, Fair Value Disclosure $ 243,262 $ 309,171
Held-to-maturity investments 0 98,653
Available-for-sale investments 79,315 0
Equity investments 10,000 10,000
Total $ 332,577 $ 417,824