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Retirement Plans
6 Months Ended
Jun. 30, 2023
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
The Company operates defined contribution retirement plans for the majority of its employees at varying rates of their salaries. Total contributions by the Company to the retirement plans were $12.5 million in the twelve months ended December 31, 2022 (2021 — $13.5 million, 2020 — $12.1 million).