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Contract Assets and Liabilities - Summary of contract assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Contractors [Line Items]
Unbilled revenue, net	$ 232,565		$ 217,083
Contract retainages, net	218,176		203,533
Contract assets, net	450,741		$ 420,616
Changes in contract assets, net, Change	30,962	$ 31,868
Change
Contractors [Line Items]
Unbilled revenue, net, Change	15,482
Contract retainages, net, Change	14,643
Changes in contract assets, net, Change	$ 30,125

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 910
-SubTopic 10
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-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
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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.

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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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