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Contract Assets and Liabilities - Summary of contract assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Contractors [Line Items]
Unbilled revenue, net	$ 189,354		$ 217,083
Contract retainages, net	212,947		203,533
Contract assets, net	402,301		$ 420,616
Changes in contract assets, net, Change	(17,057)	$ 81,243
Change
Contractors [Line Items]
Unbilled revenue, net, Change	(27,729)
Contract retainages, net, Change	9,414
Changes in contract assets, net, Change	$ (18,315)

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The increase (decrease) during the reporting period of the amount of contract receivable retainage.

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The amount of contract with customer, increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts.

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Amount of right to consideration in exchange for good or service transferred to customer withheld under retainage provision in long-term contract or program when right to consideration is unconditional.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 910
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
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Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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-Topic 912
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