XML 70 R58.htm IDEA: XBRL DOCUMENT v3.20.4
Employee Benefit Plan - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan, employer matching contribution, percent of match 50.00% 50.00% 50.00%
Defined contribution plan, maximum annual contributions by employer per employee, amount $ 8,550 $ 8,400 $ 8,250
Defined contribution plan, cost $ 1,100,000 $ 1,000,000.0 $ 700,000
Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan, employer matching contribution, percent of employees' gross pay 3.00% 3.00% 3.00%