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Stock-Based Compensation
 9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation
4.
Stock-Based Compensation

In February 2017, the Company’s shareholders approved the 2017 Incentive Stock and Awards Plan (the “2017 Stock Plan”). The 2017 Stock Plan replaced the 2009 Incentive Stock and Awards Plan (as amended, the “2009 Stock Plan”). While no new awards will be granted under the 2009 Stock Plan, awards previously made under that plan that were outstanding as of the approval date of the 2017 Stock Plan remain outstanding and continue to be governed by the provisions of that plan. At September 30, 2023, the Company had reserved 2,779,780 shares of Common Stock available for issuance to provide for the exercise of outstanding stock options and the issuance of Common Stock under incentive compensation awards, including awards issued prior to the effective date of the 2017 Stock Plan.

The Company recognizes stock-based compensation expense over the requisite service period for vesting of an award, or to an employee’s eligible retirement date, if earlier and applicable. Total stock-based compensation expense, including cash-settled liability awards, was $10.7 million ($9.4 million net of tax) and $8.6 million ($7.2 million net of tax) for the three months ended September 30, 2023 and 2022, respectively. Total stock-based compensation expense, including cash-settled liability awards, was $26.5 million ($22.8 million net of tax) and $21.3 million ($17.8 million net of tax) for the nine months ended September 30, 2023 and 2022, respectively.