Revenue from Contracts with Customers - Schedule of Significant Changes in Contract Cost Assets and Contract Revenue Liabilities (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Revenue from Contract with Customer [Abstract]
Beginning balance, contract costs assets	$ 7,324
Increase due to contractual changes, contract costs assets	9,412
Decrease due to recognition of revenue, contract cost assets	(9,595)
Ending balance, contract cost assets	7,141	[1]
Beginning balance, contract revenues	35,085
Increase due to contractual changes, contract revenues	64,458
Decrease due to recognition of revenue, contract revenues	(64,037)
Ending balance, contract revenues	$ 35,506	[1]

[1] We expect to recognize contract revenues of approximately $35.5 million during the remaining six months of 2023 related to unsatisfied performance obligations existing as of June 30, 2023, which includes $26.1 million related to customer prefunding of reimbursables.