v3.26.3
Share-based awards (Tables)
 9 Months Ended
Sep. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
The following table summarizes option activity for the nine months ended September 30, 2026:
Options
Outstanding
Number of Shares 		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual
Life
Outstanding at December 31, 2025639,184 $179.12 3.90
Granted65,202 $166.05 
Exercised(106,945)$121.92 
Expired(31,560)$116.06 
Outstanding at September 30, 2026565,881 $191.94 4.27
Exercisable at September 30, 2026424,543 $191.13 3.47
Schedule of Weighted Average Fair Values and Assumptions Used The weighted average grant date fair values and assumptions used were as follows:
Nine Months Ended
September 30,
2026		September 30,
2025
Weighted average grant date fair value$75.50 $64.42 
Assumptions:
Expected volatility49 %35 %
Dividend yield— %— %
Risk-free interest rate4.33 %4.00 %
Expected life4.4 years4.4 years
Schedule of RSU and PSU Activity The following table summarizes RSU and PSU activity for the nine months ended September 30, 2026:
PSU
Outstanding
Number of
Shares		PSU
Weighted
Average Grant Date
Fair Value		RSU
Outstanding
Number of
Shares		RSU
Weighted
Average Grant Date
Fair Value
Outstanding at December 31, 202516,474 $185.18 1,476,169 $162.53 
Awarded*98,400 $162.85 652,246 $166.05 
Shares vested— $— (602,157)$133.96 
Cash settled— $— (18,470)$127.17 
Forfeited— $— (92,795)$181.60 
Outstanding at September 30, 2026114,874 $166.05 1,414,993 $175.53 
*We issue PSUs for which the number of shares awarded are based on pre-established targets. For PSUs awarded, the number of units reflects the estimated number of shares to be issued based on performance as of the current reporting period. Awarded units are presented net of performance adjustments.
Schedule of Non-Cash Stock Compensation Expense
Share-based compensation expense (inclusive of employer related taxes) for the three and nine months ended September 30, 2026 and September 30, 2025 has been allocated as follows:
Three Months EndedNine Months Ended
September 30,
2026		September 30,
2025		September 30,
2026		September 30,
2025
(in thousands)
Direct costs$8,231 $21,479 $38,949 $36,150 
Selling, general and administrative9,775 24,712 25,475 37,768 
Total$18,006 $46,191 $64,424 $73,918