Revenue Recognition and Related Balance Sheet Accounts - Revenue Disaggregated by Geographic Location and Contract Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 4,459,757	$ 3,353,278	$ 12,657,285	$ 9,056,675
Percent of total revenues	100.00%	100.00%	100.00%	100.00%
United States
Disaggregation of Revenue [Line Items]
Revenues	$ 3,760,019	$ 2,892,446	$ 10,751,325	$ 7,669,360
Percent of total revenues	84.30%	86.20%	84.90%	84.70%
Canada
Disaggregation of Revenue [Line Items]
Revenues	$ 512,803	$ 382,072	$ 1,503,174	$ 1,123,077
Percent of total revenues	11.50%	11.40%	11.90%	12.40%
Australia
Disaggregation of Revenue [Line Items]
Revenues	$ 130,851	$ 52,804	$ 275,421	$ 170,719
Percent of total revenues	2.90%	1.60%	2.20%	1.90%
Others
Disaggregation of Revenue [Line Items]
Revenues	$ 56,084	$ 25,956	$ 127,365	$ 93,519
Percent of total revenues	1.30%	0.80%	1.00%	1.00%
Unit-price contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 1,597,640	$ 1,399,358	$ 4,407,147	$ 3,593,644
Percent of total revenues	35.80%	41.80%	34.80%	39.70%
Cost-plus contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 986,262	$ 825,622	$ 2,879,492	$ 2,247,879
Percent of total revenues	22.10%	24.60%	22.80%	24.80%
Fixed price contracts
Disaggregation of Revenue [Line Items]
Revenues	$ 1,875,855	$ 1,128,298	$ 5,370,646	$ 3,215,152
Percent of total revenues	42.10%	33.60%	42.40%	35.50%