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Restricted Cash and Cash Equivalents - Reconciliation of Cash, Cash Equivalents and Restricted Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 70,635 $ 93,971 $ 141,020  
Restricted cash and investments - non-current 147,774 135,968 130,729  
Less Restricted investments - non-current (100,006)   (65,565)  
Total cash, cash equivalents and restricted cash and cash equivalents shown in the statement of cash flows $ 118,403 $ 159,867 $ 206,184 $ 143,843