Revenue (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2023		2022
Rail Products and Global Friction Management	$	56,048	$	51,651
Technology Services and Solutions	8,336		12,059
Rail, Technologies, and Services	64,384		63,710
Precast Concrete Buildings	10,886		9,970
Other Precast Concrete Products	13,402		5,040
Precast Concrete Products	24,288		15,010
Fabricated Steel Products	10,517		12,604
Coatings and Measurement	16,299		7,470
Steel Products and Measurement	26,816		20,074
Total net sales	$	115,488	$	98,794

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, 2023
	Rail, Technologies, and Services		Precast Concrete Products		Steel Products and Measurement		Total
Point in time	$	53,834	$	13,402	$	15,726	$	82,962
Over time	10,550		10,886		11,090		32,526
Total net sales	$	64,384	$	24,288	$	26,816	$	115,488
	Three Months Ended March 31, 2022
	Rail, Technologies, and Services		Precast Concrete Products		Steel Products and Measurement		Total
Point in time	$	49,166	$	4,263	$	15,062	$	68,491
Over time	14,544		10,747		5,012		30,303
Total net sales	$	63,710	$	15,010	$	20,074	$	98,794

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,
	2023		2022		2023		2022
Over time input method	$	16,211	$	19,322	14.0	%	19.6	%
Over time output method	16,315		10,981		14.1		11.1
Total over time sales	$	32,526	$	30,303	28.2	%	30.7	%

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	1,290
Transfers from contract asset balance to accounts receivable	(3,696)
Balance as of March 31, 2023	$	31,207

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	(3,443)
Increase in billings in excess of cost, excluding revenue recognized	1,983
Other adjustments, including business divestiture	(2,078)
Balance as of March 31, 2023	$	3,243