Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.21.2
Stock-Based Compensation (Narrative) (Details)
9 Months Ended
Sep. 30, 2021
USD ($)
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures | shares 545,976
Stock options  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Weighted average grant date fair value | $ / shares $ 17.55
Unrecognized costs related to share based compensation | $ $ 13,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 6 months 21 days
Restricted stock units  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Estimated average fair value per restricted stock unit granted | $ / shares $ 96.06
Unrecognized costs related to share based compensation | $ $ 22,800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 3 months 29 days
Granted, number of shares | shares 175,556