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Investments, Variable Interest Entities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Variable Interest Entities [Abstract]    
Carrying amount of interest $ 3,117 $ 3,238
Investment in unconsolidated trusts 1,238 1,238
VIE, Not Primary Beneficiary [Member] | Other Invested Assets [Member]    
Variable Interest Entities [Abstract]    
Carrying amount of interest 3,117 3,238
Investment in unconsolidated trusts 1,238 1,238
Maximum loss exposure 4,355 4,476
Outstanding commitments $ 1,997 $ 1,997