CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
REVENUE	$ 1,812,366	$ 1,378,124	$ 5,159,672	$ 3,849,194
COST OF SERVICES	1,430,652	1,100,625	4,116,999	3,138,370
Gross profit	381,714	277,499	1,042,673	710,824
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	180,177	142,935	522,437	414,397
GAIN ON SALE OF ASSETS	(1,347)	(579)	(2,778)	(1,683)
Operating income	202,884	135,143	523,014	298,110
OTHER INCOME (EXPENSE):
Interest income	3,825	952	6,692	2,441
Interest expense	(1,730)	(1,886)	(5,072)	(9,880)
Changes in the fair value of contingent earn-out obligations	(17,254)	(8,727)	(44,434)	(14,207)
Other	87	(44)	323	1
Other income (expense)	(15,072)	(9,705)	(42,491)	(21,645)
INCOME BEFORE INCOME TAXES	187,812	125,438	480,523	276,465
PROVISION FOR INCOME TAXES	41,577	20,313	103,960	44,648
NET INCOME	$ 146,235	$ 105,125	$ 376,563	$ 231,817
INCOME PER SHARE:
Basic	$ 4.10	$ 2.93	$ 10.54	$ 6.47
Diluted	$ 4.09	$ 2.93	$ 10.52	$ 6.46
SHARES USED IN COMPUTING INCOME PER SHARE:
Basic	35,669	35,820	35,718	35,819
Diluted	35,755	35,917	35,804	35,910