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Accumulated Other Comprehensive Income Reclassification Out Of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (Loss) on Investments $ 2,481 $ 268 $ 6,266 $ 771
Write-down of securities     (162) 0
Income (loss) before income taxes 10,088 18,437 20,834 61,040
Tax (2,175) (3,934) (4,457) (12,932)
Net income 7,913 14,503 16,377 48,108
Reclassification out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net income (73) (9) (207) 15
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains and Losses on Available-For-Sale Securities        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Gain (Loss) on Investments (58) (11) (104) 19
Write-down of securities (35) 0 (162) 0
Income (loss) before income taxes (93) (11) (266) 19
Tax 20 2 59 (4)
Net income $ (73) $ (9) $ (207) $ 15