Revenue (Tables)

9 Months Ended

Sep. 30, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Sales by Major Product Line

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024		2023
Rail Products	$	47,442	$	60,137	$	156,803	$	164,612
Global Friction Management	19,548		16,125		51,008		49,624
Technology Services and Solutions	12,508		10,604		39,904		28,630
Rail, Technologies, and Services	79,498		86,866		247,715		242,866
Precast Concrete Products	42,688		38,642		97,730		96,795
Steel Products	15,280		19,837		57,137		69,206
Infrastructure Solutions	57,968		58,479		154,867		166,001
Total net sales	$	137,466	$	145,345	$	402,582	$	408,867

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, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	62,717	$	33,462	$	96,179
Over time	16,781		24,506		41,287
Total net sales	$	79,498	$	57,968	$	137,466
	Three Months Ended September 30, 2023
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	72,246	$	38,534	$	110,780
Over time	14,620		19,945		34,565
Total net sales	$	86,866	$	58,479	$	145,345

	Nine Months Ended September 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	198,179	$	98,246	$	296,425
Over time	49,536		56,621		106,157
Total net sales	$	247,715	$	154,867	$	402,582
	Nine Months Ended September 30, 2023
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	202,003	$	102,609	$	304,612
Over time	40,863		63,392		104,255
Total net sales	$	242,866	$	166,001	$	408,867

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,
	2024		2023		2024		2023
Over time input method	$	15,020	$	12,642	10.9	%	8.7	%
Over time output method	26,267		21,923		19.1		15.1
Total over time sales	$	41,287	$	34,565	30.0	%	23.8	%

	Nine Months Ended September 30,				Percentage of Total Net Sales Nine Months Ended September 30,
	2024		2023		2024		2023
Over time input method	$	42,259	$	44,577	10.5	%	10.9	%
Over time output method	63,898		59,678		15.9		14.6
Total over time sales	$	106,157	$	104,255	26.4	%	25.5	%

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, 2023	$	29,489
Net additions to contract assets	9,898
Transfers from contract asset balance to accounts receivable	(19,201)
Balance as of September 30, 2024	$	20,186

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

	Contract Liabilities
Balance as of December 31, 2023	$	2,189
Revenue recognized from contract liabilities	(1,285)
Increase in billings in excess of cost, excluding revenue recognized	1,744
Other adjustments	(317)
Balance as of September 30, 2024	$	2,331