Concentration of Risk and Enterprise-Wide Disclosures (Tables)

9 Months Ended

Sep. 30, 2023

Trade and contract retainage receivables

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	September 30, 2023				December 31, 2022
Federal Government	$	16,408	10	%	$	4,612	3	%
State Governments		2,206	1	%		3,111	2	%
Local Governments		21,196	13	%		16,197	10	%
Private Companies		127,406	76	%		134,317	85	%
Gross receivables		167,216	100	%		158,237	100	%
Allowance for credit losses		(496)				(606)
Net receivables	$	166,720			$	157,631

Contract revenues

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	Three months ended September 30,								Nine months ended September 30,
	2023		%		2022		%		2023		%		2022		%
Federal Government	$	27,336	16	%	$	15,394	8	%	$	94,808	19	%	$	57,923	11	%
State Governments		12,360	7	%		17,836	10	%		44,864	9	%		39,293	7	%
Local Governments		29,422	17	%		31,609	17	%		71,803	14	%		90,209	16	%
Private Companies		99,358	59	%		117,782	65	%		298,709	59	%		364,702	66	%
Total contract revenues	$	168,476	99	%	$	182,621	100	%	$	510,184	101	%	$	552,127	100	%