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Employee Retirement Benefit Plans
 12 Months Ended
Dec. 31, 2022
Retirement Benefits [Abstract]  
Employee Retirement Benefit Plans

10. Employee Retirement Benefit Plans

We sponsor a defined contribution plan covering substantially all of our U.S.-based employees. Eligible participants may defer up to 100% of their eligible pay, subject to certain limitations, as pre-tax, Roth, or traditional after-tax contributions. We make certain matching, and at our discretion, non-elective employer contributions to the plan. All contributions are subject to certain IRS limits. The expense related to these contributions for 2022, 2021, and 2020 was $13.2 million, $12.4 million, and $12.1 million, respectively. We also have defined contribution-type plans for certain of our non-U.S.-based employees. The total contributions made to these plans in 2022, 2021, and 2020 were $6.6 million, $6.1 million, and $4.8 million, respectively.