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Investments - Restricted Cash (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Restricted Cash and Cash Equivalents Items    
Assets Held-in-trust $ 48,874 $ 45,364
Restricted Cash 49,501 45,988
Regulatory Assets, Fair Value Disclosure 627 624
Security Deposit $ 2,493 $ 2,616