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Cash, Cash Equivalents and Short-Term Investments - Equity Investments (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash, Cash Equivalents and Short-Term Investments      
Investments in equity securities $ 99,800 $ 110,000  
Net losses recognized during the year on equity securities (11,406) (1,386) $ (245)
Less: net losses recognized during the year on equity securities sold during the year     1,090
Unrealized gains (losses) recognized during the year on equity securities still held at December 31, 2022, 2021 and 2020 $ (11,406) $ (1,386) $ 845