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Stock-Based Compensation
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Stock-Based Compensation
NOTE 8—STOCK-BASED COMPENSATION
The Company's Stock Incentive Plan allows for grants of incentive stock options, non-statutory stock options, restricted stock awards, restricted stock units, and other stock-based or cash-based awards.
Stock-Based Compensation Expense
Stock-based compensation expense consisted of the following:
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)2021202020212020
Stock options$1,500 $1,775 $5,271 $5,234 
Restricted stock units3,164 3,315 9,216 7,568 
Total$4,664 $5,090 $14,487 $12,802 
Stock Options
During the nine months ended September 30, 2021, the Company granted a total of 545,976 stock options at a weighted average grant date fair value of $17.55 per share. As of September 30, 2021, unrecognized costs related to outstanding stock options totaled $13.0 million, before any related tax benefit. As of September 30, 2021, unrecognized costs related to stock options are expected to be recognized over a weighted average period of 2.56 years.
Restricted Stock Units
During the nine months ended September 30, 2021, the Company granted 175,556 restricted stock units at a weighted average grant date fair value of $96.06 per share. As of September 30, 2021, unrecognized costs related to outstanding restricted stock units totaled $22.8 million, before any related tax benefit. As of September 30, 2021, unrecognized costs related to restricted stock units are expected to be recognized over a weighted average period of 2.33 years.