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Investments (Carrying Amount for Equity Method Investment) (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Investment in corporate debt securities $ 15,000  
Maximum exposure to loss 113,460 $ 122,593
Investment in corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Investment in corporate debt securities 15,000  
Maximum exposure to loss $ 15,000