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Employee Savings Plan - Additional Information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
Day
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
Employee Savings Plan [Abstract]        
Service Period Eligible to Participate for Employee Savings Plan | Day 30      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 4.00%     2.50%
Discretionary Profit Sharing Contribution Percentage of Employees Salary 1.50%      
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ $ 22.8 $ 22.8 $ 19.6