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Stock-Based Compensation (Narrative) (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
$ / shares
Share-based Payment Arrangement [Abstract]  
Weighted average fair value of options granted | $ / shares $ 13.30
Unrecognized compensation expense | $ $ 12,800
Weighted average period for recognition 2 years 8 months 12 days