XML 89 R67.htm IDEA: XBRL DOCUMENT v3.20.4
Employee Benefit Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]      
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 50.00%    
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 6.00%    
401(k) plan, expense recognized $ 2.2 $ 2.1 $ 1.8