Employee Savings Plan and Employee Stock Purchase Plan	12 Months Ended
Dec. 31, 2023
Compensation Related Costs [Abstract]
Employee Savings Plan and Employee Stock Purchase Plan	10. EMPLOYEE SAVINGS PLAN AND EMPLOYEE STOCK PURCHASE PLAN Employees over the age of 18 who have completed ninety days of service are eligible to participate in our 401(k) plan. We have made a Qualified Automatic Contribution Arrangement (“QACA”) election, whereby the Company matches the contribution of our employees equal to 100% of the first 1% of salary deferrals and 50% of salary deferrals between 2% and 6%, up to a maximum matching contribution of 3.5% of an employee’s salary each plan year. We are allowed to make additional discretionary matching contributions and discretionary profit sharing contributions. Employees are 100% vested in amounts attributable to salary deferrals and rollover contributions. The QACA matching contributions as well as the discretionary matching and profit sharing contributions vest 100% after two years of employment from the date of hire. Matching contributions were $15.9 million, $12.7 million and $11.6 million for the years ended December 31, 2023, 2022 and 2021, respectively. The ESPP has overlapping offering periods, with each offering period lasting approximately 24 months. At the beginning of each offering period, eligible employees may elect to contribute, through payroll deductions, up to 10% of their compensation, subject to an annual per employee maximum of $25,000. Eligible employees purchase shares of the Company’s common stock at a price equal to 85% of the fair market value of the shares on the exercise date. The maximum number of shares that may be purchased by a participant during each offering period is 2,000 shares, subject to limits specified by the Internal Revenue Service. The shares reserved for purposes of the ESPP are shares we purchase in the open market. The maximum aggregate number of shares of the Company’s common stock that may be purchased by all participants under the ESPP is 2.0 million shares. During the years ended December 31, 2023, 2022 and 2021, eligible employees purchased 72,942, 54,059 and 40,699 shares, respectively, of the Company’s common stock under the ESPP. Compensation expense related to the ESPP is recognized on a straight-line basis over the requisite service period. Our compensation expense related to the ESPP was $3.5 million, $2.8 million and $2.7 million for the years ended December 31, 2023, 2022 and 2021, respectively.

Employee Savings Plan and Employee Stock Purchase Plan

12 Months Ended

Dec. 31, 2023

Employee Savings Plan and Employee Stock Purchase Plan

10.

EMPLOYEE SAVINGS PLAN AND EMPLOYEE STOCK PURCHASE PLAN

Employees over the age of 18 who have completed ninety days of service are eligible to participate in our 401(k) plan. We have made a Qualified Automatic Contribution Arrangement (“QACA”) election, whereby the Company matches the contribution of our employees equal to 100% of the first 1% of salary deferrals and 50% of salary deferrals between 2% and 6%, up to a maximum matching contribution of 3.5% of an employee’s salary each plan year. We are allowed to make additional discretionary matching contributions and discretionary profit sharing contributions. Employees are 100% vested in amounts attributable to salary deferrals and rollover contributions. The QACA matching contributions as well as the discretionary matching and profit sharing contributions vest 100% after two years of employment from the date of hire. Matching contributions were $15.9 million, $12.7 million and $11.6 million for the years ended December 31, 2023, 2022 and 2021, respectively.

The ESPP has overlapping offering periods, with each offering period lasting approximately 24 months. At the beginning of each offering period, eligible employees may elect to contribute, through payroll deductions, up to 10% of their compensation, subject to an annual per employee maximum of $25,000. Eligible employees purchase shares of the Company’s common stock at a price equal to 85% of the fair market value of the shares on the exercise date. The maximum number of shares that may be purchased by a participant during each offering period is 2,000 shares, subject to limits specified by the Internal Revenue Service. The shares reserved for purposes of the ESPP are shares we purchase in the open market. The maximum aggregate number of shares of the Company’s common stock that may be purchased by all participants under the ESPP is 2.0 million shares. During the years ended December 31, 2023, 2022 and 2021, eligible employees purchased 72,942, 54,059 and 40,699 shares, respectively, of the Company’s common stock under the ESPP. Compensation expense related to the ESPP is recognized on a straight-line basis over the requisite service period. Our compensation expense related to the ESPP was $3.5 million, $2.8 million and $2.7 million for the years ended December 31, 2023, 2022 and 2021, respectively.