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Fair Value of Financial Instruments - Rollforward of Level 3 Assets Measured on Recurring Basis (Details) - Fair Value, Recurring Measurements [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]    
Level 3 assets, beginning of period $ 3,596 $ 2,047
Net unrealized gains (losses) included in other comprehensive income $ (1)  
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax  
Realized gains (losses) and accretion (amortization) recognized in earnings $ (204) $ (493)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Realized Investment Gains Losses Realized Investment Gains Losses
Purchases $ 1,661 $ 2,067
Settlements   (25)
Transfers out of Level 3 (3,342)  
Level 3 assets, end of period $ 1,710 $ 3,596