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Investments - Summary of Information Relating to Investments Measured at Fair Value for Company has Used Unobservable Inputs to Determine Fair Value (Parenthetical) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Transfers out of Level III $ 14,172 [1] $ 10,936 [2]
Transfers into Level III 3,815 [3] 21,522 [4]
Debt securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Transfers out of Level III 14,172 [1] 10,938 [2]
Transfers into Level III $ 3,815 [3] $ 21,522 [4]
[1] Transfers out of Level III represent a transfer of $14.2 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were observable as of December 31, 2022.
[2] Transfers out of Level III represent a transfer of $10.9 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were observable as of December 31, 2021.
[3] Transfers into Level III represent a transfer of $3.8 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were unobservable as of December 31, 2022.
[4] Transfers into Level III represent a transfer of $21.5 million relating to debt securities for which pricing inputs, other than their quoted prices in active markets were unobservable as of December 31, 2021.