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Variable Interest Entities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Variable Interest Entity [Line Items]      
Restricted cash and cash equivalents [1] $ 12,715 $ 2,635 $ 2,635
Variable Interest Entity, Primary Beneficiary [Member]      
Variable Interest Entity [Line Items]      
Restricted cash and cash equivalents $ 10,100    
[1] See “—Note 5 (Insurance Operations),” for a discussion of the nature of the restrictions for restricted cash and cash equivalents and “—Note 18 (Variable Interest Entities),” for a discussion of restricted cash held in a trust account.