Revenue Recognition and Related Balance Sheet Accounts - Revenue Disaggregated by Geographic Location and Contract Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 5,031,819	$ 4,428,826
Percent of total revenues (in percent)	100.00%	100.00%
United States
Disaggregation of Revenue [Line Items]
Revenues	$ 4,569,716	$ 3,666,365
Percent of total revenues (in percent)	90.80%	82.80%
Canada
Disaggregation of Revenue [Line Items]
Revenues	$ 229,427	$ 542,360
Percent of total revenues (in percent)	4.60%	12.20%
Australia
Disaggregation of Revenue [Line Items]
Revenues	$ 146,029	$ 154,677
Percent of total revenues (in percent)	2.90%	3.50%
Others
Disaggregation of Revenue [Line Items]
Revenues	$ 86,647	$ 65,424
Percent of total revenues (in percent)	1.70%	1.50%
Fixed price contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 2,672,315	$ 1,934,888
Percent of total revenues (in percent)	53.10%	43.70%
Unit-price contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 1,427,507	$ 1,497,394
Percent of total revenues (in percent)	28.40%	33.80%
Cost-plus contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 931,997	$ 996,544
Percent of total revenues (in percent)	18.50%	22.50%