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Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2024
Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Net realized gains (losses) on sale on investments $ (1,146)     $ (431)     $ (1,534) $ (337)
Income tax expense (benefit) 1,960     1,962     (24,356) (15,629)
Net of tax (16,163) $ 35,416 $ 33,657 (5,915) $ 28,566 $ 24,173 52,910 46,824
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Reclassification out of Accumulated Other Comprehensive Income                
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                
Net realized gains (losses) on sale on investments (800)     (10)     (796) (732)
Income tax expense (benefit) 196     3     196 180
Net of tax $ (604)     $ (7)     $ (600) $ (552)