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Employee Retirement Benefit Plan
12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]  
Employee Retirement Benefit Plan EMPLOYEE RETIREMENT BENEFIT PLANWe maintain a 401(k) defined contribution retirement plan for our eligible U.S. employees. Costs charged to operations in connection with the 401(k) plan during 2019, 2018 and 2017 aggregated to $2.2 million, $2.1 million, and $1.7 million, respectively.