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Retirement Plans
12 Months Ended
Dec. 31, 2023
Retirement Benefits [Abstract]  
Retirement Plans
15. Retirement Plans
We have a defined contribution 401(k) retirement and savings plan (the “Plan”) to provide retirement benefits for all eligible employees. With limited exceptions, all employees over the age of 21 on the first day of the month immediately following the month of hiring are eligible to participate in the Plan. The Plan allows eligible employees to make salary-deferred contributions up to 75% of their pre-tax annual compensation, as defined in the Plan, as long as the total contributed does not exceed the annual maximum allowable amount under the Internal Revenue Code. The Company makes a semi-monthly matching contribution of 100% of the employee's contribution for that pay period, up to a maximum of 4% of the employee's eligible gross compensation for that pay period. Company contributions vest ratably based on years of service over a four year period, beginning with the completion of the first year of service. For the years ended December 31, 2023, 2022, and 2021, we incurred $12.9 million, $11.5 million, and $8.7 million, respectively, in contribution expense related to employer matching contributions.