Concentration of Risk and Enterprise-Wide Disclosures (Tables)

6 Months Ended

Jun. 30, 2023

Trade and contract retainage receivables

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	June 30, 2023				December 31, 2022
Federal Government	$	26,878	16	%	$	4,612	3	%
State Governments		2,740	2	%		3,111	2	%
Local Governments		19,139	11	%		16,197	10	%
Private Companies		120,061	71	%		134,317	85	%
Gross receivables		168,818	100	%		158,237	100	%
Allowance for credit losses		(576)				(606)
Net receivables	$	168,242			$	157,631

Contract revenues

Concentration Risk [Line Items]

Schedules of concentration of risk, by risk factor

	Three months ended June 30,								Six months ended June 30,
	2023		%		2022		%		2023		%		2022		%
Federal Government	$	44,416	24	%	$	19,834	10	%	$	67,472	20	%	$	42,529	12	%
State Governments		14,176	8	%		13,753	7	%		32,504	10	%		21,457	5	%
Local Governments		21,693	12	%		26,198	14	%		42,381	12	%		58,600	16	%
Private Companies		102,249	56	%		134,790	69	%		199,351	58	%		246,920	67	%
Total contract revenues	$	182,534	100	%	$	194,575	100	%	$	341,708	100	%	$	369,506	100	%