Revenue (Tables)

6 Months Ended

Jun. 30, 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 June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Rail Products	$	56,323	$	64,246	$	109,361	$	104,475
Global Friction Management	17,438		17,680		31,459		33,499
Technology Services and Solutions	11,833		9,690		27,397		18,026
Rail, Technologies, and Services	85,594		91,616		168,217		156,000
Precast Concrete Products	33,950		33,865		55,041		58,153
Steel Products	21,252		22,553		41,858		49,369
Infrastructure Solutions	55,202		56,418		96,899		107,522
Total net sales	$	140,796	$	148,034	$	265,116	$	263,522

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 June 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	69,923	$	35,127	$	105,050
Over time	15,671		20,075		35,746
Total net sales	$	85,594	$	55,202	$	140,796
	Three Months Ended June 30, 2023
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	75,923	$	34,947	$	110,870
Over time	15,693		21,471		37,164
Total net sales	$	91,616	$	56,418	$	148,034

	Six Months Ended June 30, 2024
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	135,462	$	64,784	$	200,246
Over time	32,755		32,115		64,870
Total net sales	$	168,217	$	96,899	$	265,116
	Six Months Ended June 30, 2023
	Rail, Technologies, and Services		Infrastructure Solutions		Total
Point in time	$	129,757	$	64,075	$	193,832
Over time	26,243		43,447		69,690
Total net sales	$	156,000	$	107,522	$	263,522

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

	Three Months Ended June 30,				Percentage of Total Net Sales Three Months Ended June 30,
	2024		2023		2024		2023
Over time input method	$	14,096	$	15,724	10.0	%	10.6	%
Over time output method	21,650		21,440		15.4		14.5
Total over time sales	$	35,746	$	37,164	25.4	%	25.1	%

	Six Months Ended June 30,				Percentage of Total Net Sales Six Months Ended June 30,
	2024		2023		2024		2023
Over time input method	$	27,239	$	31,935	10.3	%	12.1	%
Over time output method	37,631		37,755		14.2		14.3
Total over time sales	$	64,870	$	69,690	24.5	%	26.4	%

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	6,223
Transfers from contract asset balance to accounts receivable	(15,150)
Balance as of June 30, 2024	$	20,562

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	(1,023)
Increase in billings in excess of cost, excluding revenue recognized	388
Other adjustments	(55)
Balance as of June 30, 2024	$	1,499