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Summary of Significant Accounting Policies - Schedule of Effects of Reclassifications out of Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Reclassification Adjustment Out of Accumulated Other Comprehensive Income (Loss)    
Earnings (loss) before income taxes $ 122,791 $ 58,525
Income tax (expense) benefit (23,980) (10,602)
Net earnings (loss) 98,811 47,923
Unrealized Gains and Losses on Available-for-Sale Securities | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment Out of Accumulated Other Comprehensive Income (Loss)    
Net realized gains (losses) - Available-for-sale (1,713) (51)
Credit gains presented within net realized gains (126) (153)
Earnings (loss) before income taxes (1,839) (204)
Income tax (expense) benefit 386 43
Net earnings (loss) $ (1,453) $ (161)