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Stock-Based Compensation
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
We grant stock-based compensation awards, including restricted stock units, phantom stock, and unrestricted stock units, under the Second Amended and Restated 2010 Stock Incentive Plan (Stock Incentive Plan). Prior to December 31, 2020, stock options were also granted as part of the stock-based compensation awards. In the Stock Incentive Plan, we have 13,991,273 shares of common stock authorized for issuance subject to stock splits, dividends, and other similar events, and at September 30, 2025, 3,851,003 shares were available for grant. We issue new shares of common stock upon the exercise of stock options or when vesting conditions on restricted stock units are fully satisfied. These shares are subject to a fungible share provision such that the authorized share available for grant under the Plan is reduced by (i) one share for every one share subject to a stock option or share appreciation right granted and (ii) 1.7 shares for every one share of common stock that was subject to an award other than an option or share appreciation right.
We also award phantom stock units, which are settled in cash upon vesting and accounted for as liability-based awards, with no impact to the shares available for grant.

In addition, we maintain the Employee Stock Purchase Plan (ESPP), for which 449,335 shares of common stock were available for future issuance at September 30, 2025.

ESPP activity and stock-based grants other than restricted stock units were not significant for the three and nine months ended September 30, 2025 and 2024.

Stock-Based Compensation Expense
Total stock-based compensation expense and the related tax benefit were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
In thousands2025202420252024
Restricted stock units$14,254 $9,886 $47,210 $31,059 
Unrestricted stock awards169 336 609 1,008 
Phantom stock units1,115 1,616 3,681 4,378 
Total stock-based compensation$15,538 $11,838 $51,500 $36,445 
Related tax benefit$3,547 $2,503 $11,759 $7,853 

Stock Options
A summary of our stock option activity is as follows:
SharesWeighted
Average Exercise
Price per Share		Weighted Average
Remaining
Contractual Life		Aggregate
Intrinsic Value		Weighted
Average Grant
Date Fair Value
In thousandsYearsIn thousands
Outstanding, January 1, 2024363 $61.36 4.0$5,886 
Granted— — $— 
Exercised(26)54.19 935 
Forfeited— — 
Canceled— — 
Outstanding, September 30, 2024337 $61.92 3.2$15,111 
Outstanding, January 1, 2025274 $64.55 3.2$12,087 
Granted— — $— 
Exercised(85)39.62 6,386 
Forfeited— — 
Canceled— — 
Outstanding, September 30, 2025189 $75.70 3.3$9,268 
Exercisable, September 30, 2025189 $75.70 3.3$9,268 

At September 30, 2025, all stock-based compensation expense related to nonvested stock options has been recognized.
Restricted Stock Units
The following table summarizes restricted stock unit activity:
In thousands, except fair valueNumber of
Restricted Stock Units		Weighted
Average Grant
Date Fair Value		Aggregate
Intrinsic Value
Outstanding, January 1, 2024751 
Granted415 $76.24 
Released (1)
(405)$33,372 
Forfeited(21)
Outstanding, September 30, 2024740 
Outstanding, January 1, 2025831 $67.71 
Granted317 98.35 
Released (1)
(542)66.25 $55,062 
Forfeited(30)83.84 
Outstanding, September 30, 2025576 85.32 
Vested but not released, September 30, 202518 $2,185 

(1) Shares released is presented as gross shares and does not reflect shares withheld by us for employee payroll tax obligations.

At September 30, 2025, total unrecognized compensation expense on restricted stock units was $50.8 million, which is expected to be recognized over a weighted average period of approximately 1.6 years.

The weighted average assumptions used to estimate the fair value of performance-based restricted stock units granted with a service and market condition and the resulting weighted average fair value are as follows:
Nine Months Ended September 30,
20252024
Expected volatility40.7 %45.7 %
Risk-free interest rate4.2 %4.4 %
Expected term (years)2.92.9
Weighted average fair value$105.89 $83.26