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Employee Benefit Plans
12 Months Ended
Dec. 31, 2021
Defined Contribution Plan [Abstract]  
Employee Benefit Plans

14.EMPLOYEE BENEFIT PLANS

We have defined contribution plans covering all U.S. full-time adult employees and certain of our foreign employees. Our contributions to these plans are discretionary in certain countries, including the U.S. In September 2019, we ceased discretionary contributions to certain of our defined contribution plans and subsequently reinstated those contributions in May 2021. Total expense for contributions made to these plans for the years ended December 31, 2021, 2020 and 2019 was $6.5 million, $3.9 million and $6.6 million, respectively.