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Investment Securities - Schedule of Investment Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items]    
Debt securities available for sale $ 85,371 $ 103,906
Long-term investment securities at fair value 29,090 32,089
Total equity securities at fair value 66,113 74,870
Total investment securities at fair value 151,484 178,776
Current investment securities at fair value 122,394 146,687
Equity-method investments 16,432 20,984
Total long-term investments 45,522 53,073
Equity securities at cost 6,200 5,200
Marketable equity securities    
Debt and Equity Securities, FV-NI [Line Items]    
Equity securities at fair value: 14,967 19,560
Mutual funds invested in debt securities    
Debt and Equity Securities, FV-NI [Line Items]    
Equity securities at fair value: $ 22,056 $ 23,221