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Fair Value Measurements - Held-to-maturity debt securities at amortized cost (Details) - US Treasury Securities [Member]
$ in Thousands
Sep. 30, 2022
USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]  
Amortized Cost $ 174,435
Unrealized Gains 16
Unrealized Losses 18
Aggregate Fair Value $ 174,433