Revenue (Tables)

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Revenues by Major Product Line

The following table summarizes the Company’s net sales by major product and service category for the periods presented:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Rail Products and Global Friction Management	$	76,262	$	69,573	$	214,236	$	192,527
Technology Services and Solutions	10,604		7,777		28,630		30,330
Rail, Technologies, and Services	86,866		77,350		242,866		222,857
Precast Concrete Buildings	20,127		15,525		50,338		41,306
Precast Infrastructure Products	18,515		13,331		46,457		26,171
Precast Concrete Products	38,642		28,856		96,795		67,477
Fabricated Steel Products	14,218		15,300		39,589		45,871
Coatings and Measurement	5,619		8,509		29,617		24,119
Steel Products and Measurement	19,837		23,809		69,206		69,990
Total net sales	$	145,345	$	130,015	$	408,867	$	360,324

Schedule of Disaggregation of Revenue

Net sales by the timing of the transfer of goods and services was as follows for the periods presented:

	Three Months Ended September 30, 2023
	Rail, Technologies, and Services		Precast Concrete Products		Steel Products and Measurement		Total
Point in time	$	72,246	$	18,516	$	20,018	$	110,780
Over time	14,620		20,126		(181)		34,565
Total net sales	$	86,866	$	38,642	$	19,837	$	145,345
	Three Months Ended September 30, 2022
	Rail, Technologies, and Services		Precast Concrete Products		Steel Products and Measurement		Total
Point in time	$	64,913	$	13,331	$	20,871	$	99,115
Over time	12,437		15,525		2,938		30,900
Total net sales	$	77,350	$	28,856	$	23,809	$	130,015

	Nine Months Ended September 30, 2023
	Rail, Technologies, and Services		Precast Concrete Products		Steel Products and Measurement		Total
Point in time	$	202,003	$	46,458	$	56,151	$	304,612
Over time	40,863		50,337		13,055		104,255
Total net sales	$	242,866	$	96,795	$	69,206	$	408,867
	Nine Months Ended September 30, 2022
	Rail, Technologies, and Services		Precast Concrete Products		Steel Products and Measurement		Total
Point in time	$	179,951	$	26,171	$	56,897	$	263,019
Over time	42,906		41,306		13,093		97,305
Total net sales	$	222,857	$	67,477	$	69,990	$	360,324

Revenue recognized over time was as follows for the periods presented:

	Three Months Ended September 30,				Percentage of Total Net Sales Three Months Ended September 30,
	2023		2022		2023		2022
Over time input method	$	12,642	$	14,380	8.7	%	11.1	%
Over time output method	21,923		16,520		15.1		12.7
Total over time sales	$	34,565	$	30,900	23.8	%	23.8	%

	Nine Months Ended September 30,				Percentage of Total Net Sales Nine Months Ended September 30,
	2023		2022		2023		2022
Over time input method	$	44,577	$	53,791	10.9	%	14.9	%
Over time output method	59,678		43,514		14.6		12.1
Total over time sales	$	104,255	$	97,305	25.5	%	27.0	%

Schedule of Contract with Customer, Contract Asset, Contract Liability

The following table sets forth the Company’s contract assets:

	Contract Assets
Balance as of December 31, 2022	$	33,613
Net additions to contract assets	3,718
Transfers from contract asset balance to accounts receivable	(6,828)
Balance as of September 30, 2023	$	30,503

The following table sets forth the Company’s contract liabilities:

	Contract Liabilities
Balance as of December 31, 2022	$	6,781
Revenue recognized from contract liabilities	(4,421)
Increase in billings in excess of cost, excluding revenue recognized	3,635
Other adjustments, including business divestiture	(1,904)
Balance as of September 30, 2023	$	4,091