CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenues	$ 1,394,373	$ 1,167,527	$ 4,049,508	$ 3,479,589
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	983,169	763,992	2,899,189	2,409,183
Selling, general and administrative expenses	234,948	206,820	685,546	599,331
Depreciation and amortization expense	31,313	19,736	94,024	63,003
Income from operations	144,943	176,979	370,749	408,072
Interest and other income, net	2,302	13,347	11,635	40,425
Foreign exchange loss	(3,627)	(710)	(20,581)	(1,416)
Income before provision for income taxes	143,618	189,616	361,803	447,081
Provision for income taxes	36,802	53,270	93,479	95,847
Net income	$ 106,816	$ 136,346	$ 268,324	$ 351,234
Net income per share:
Basic (in usd per share)	$ 1.92	$ 2.40	$ 4.77	$ 6.11
Diluted (in usd per share)	$ 1.91	$ 2.37	$ 4.75	$ 6.04
Shares used in calculation of net income per share:
Basic (in shares)	55,557	56,910	56,214	57,445
Diluted (in shares)	55,817	57,425	56,534	58,166