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Investments - Restricted Cash (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Restricted Cash and Cash Equivalents Items    
Assets Held-in-trust $ 32,314 $ 32,211
Restricted Cash 33,361 33,254
Regulatory Assets, Fair Value Disclosure 1,047 1,043
Security Deposit $ 3,012 $ 2,885