Revenue (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Revenues 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 March 31,
	2024		2023
Rail Products	$	53,038	$	40,228
Global Friction Management	14,022		15,820
Technology Services and Solutions	15,563		8,336
Rail, Technologies, and Services	82,623		64,384
Precast Concrete Products	21,091		24,288
Steel Products	20,606		26,816
Infrastructure Solutions	41,697		51,104
Total net sales	$	124,320	$	115,488

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 March 31, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	65,539	$	29,657	$	95,196
Over time	17,084		12,040		29,124
Total net sales	$	82,623	$	41,697	$	124,320
	Three Months Ended March 31, 2023
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	53,834	$	29,128	$	82,962
Over time	10,550		21,976		32,526
Total net sales	$	64,384	$	51,104	$	115,488

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

	Three Months Ended March 31,				Percentage of Total Net Sales Three Months Ended March 31,
	2024		2023		2024		2023
Over time input method	$	13,143	$	16,211	10.6	%	14.0	%
Over time output method	15,981		16,315		12.9		14.1
Total over time sales	$	29,124	$	32,526	23.4	%	28.2	%

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	4,212
Transfers from contract asset balance to accounts receivable	(9,560)
Balance as of March 31, 2024	$	24,141

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	(1,467)
Increase in billings in excess of cost, excluding revenue recognized	1,850
Other adjustments	317
Balance as of March 31, 2024	$	2,889