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Post-Retirement Plan
12 Months Ended
Dec. 31, 2020
Post-Retirement Plan [Abstract]  
Post-Retirement Plan 15. Post-Retirement Plan

The Company has 401(k) plans available to substantially all employees. The Company generally makes matching contributions of 50% of employees’ salary deferral amounts on the first 6% of employees’ compensation. Contributions to the plans during the years ended December 31, 2020, 2019 and 2018 were $2.5 million, $1.9 million and $1.9 million, respectively.