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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense Stock-based compensation expense consisted of the following:
Three Months Ended June 30,Six Months Ended June 30,
(in thousands)2021202020212020
Stock options$1,861 $1,755 $3,771 $3,459 
Restricted stock units3,088 2,282 6,052 4,253 
Total$4,949 $4,037 $9,823 $7,712