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Employee Benefit Plans
12 Months Ended
Dec. 31, 2020
Employee Benefit Plans [Abstract]  
Employee Benefit Plans
12. Employee Benefit Plans
The Company sponsors 401(k) plans for certain employees who meet specified age and length of service requirements. The 401(k) plans include a deferral feature under which employees may elect to defer a portion of their salary, subject to Internal Revenue Service limitations. The Company provides a matching contribution based on a percentage of participating employees’ salaries and contributions made. Total contributions to the plan for the years ended December 31, 2020, 2019, and 2018, were $10.8 million, $13.9 million, and $13.2 million, respectively.