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Benefit Plans - Incentive Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Incentive Plan for Key Executives | Salaries and employee benefits |  |  |
Incentive Plans |  |  |
Incentive plan expense | $ 15.5 | $ 13.5 | $ 15.2

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