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Marketable Debt and Equity Securities - Maturities (Details)
$ in Thousands
Mar. 31, 2023
USD ($)
Amortized Cost  
Mature in one year or less $ 479,536
Mature within two years 0
Amortized Cost 479,536
Estimated Cost Fair Value  
Mature in one year or less 475,922
Mature within two years 0
Estimated Cost Fair Value $ 475,922