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Derivative Instruments (Details)
$ in Thousands
Sep. 30, 2022
USD ($)
contract
Dec. 31, 2021
USD ($)
contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Estimated Fair Value $ 11,840 $ 23,022
Derivatives not designated as hedge | Equity-indexed options    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount $ 869,504 $ 526,096
Number of Contracts | contract 594 482
Estimated Fair Value $ 11,840 $ 23,766
Derivatives not designated as hedge | Equity-indexed embedded derivative    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount $ 729,352 $ 525,548
Number of Contracts | contract 5,689 4,205
Estimated Fair Value $ 120,835 $ 123,692