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Share-based awards (Tables)

9 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table summarizes option activity for the nine months ended September 30, 2025:

			Options Outstanding Number of Shares						Weighted Average Exercise Price						Weighted Average Remaining Contractual Life
Outstanding at December 31, 2024			622,292						$	170.52					3.91
Granted			118,902						$	185.18
Exercised			(65,894)						$	111.04
Forfeited/Expired			(15,576)						$	252.40
Outstanding at September 30, 2025			659,724						$	177.17					4.10
Exercisable at September 30, 2025			424,978						$	152.58					2.85

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, 2025						September 30, 2024
Weighted average grant date fair value			$	64.42					$	115.76
Assumptions:
Expected volatility			35		%				36		%
Dividend yield			—		%				—		%
Risk-free interest rate			4.00		%				4.20		%
Expected life			4.4 years						4.3 years

Schedule of RSU and PSU Activity

The following table summarizes RSU and PSU activity for the nine months ended September 30, 2025:

			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, 2024			19,721						$	280.76					647,589						$	251.36
Granted			41,359						$	185.18					1,160,760						$	130.85
Shares vested			(8,191)						$	231.68					(33,317)						$	273.99
Forfeited			(31,255)						$	232.28					(125,578)						$	216.40
Outstanding at September 30, 2025			21,634						$	186.66					1,649,454						$	168.76

Schedule of Non-Cash Stock Compensation Expense

Stock compensation expense for the three and nine months ended September 30, 2025 and September 30, 2024 has been allocated as follows:

			Three Months Ended									Nine Months Ended
			September 30, 2025			September 30, 2024						September 30, 2025			September 30, 2024
			(in thousands)
Direct costs			$	21,479		$	7,745					$	36,150		$	21,765
Selling, general and administrative			24,712			5,293						37,768			19,418
Total			$	46,191		$	13,038					$	73,918		$	41,183

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Schedule of Non Cash Stock Compensation Expense.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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-Topic 718
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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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