Revenue - Schedule of Timing of Transfer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue
Total net sales	$ 138,286	$ 137,466	$ 379,636	$ 402,582
Point in time
Disaggregation of Revenue
Total net sales	104,773	96,179	285,683	296,425
Over time
Disaggregation of Revenue
Total net sales	33,513	41,287	93,953	106,157
Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	77,788	79,498	207,776	247,715
Rail, Technologies, and Services | Point in time
Disaggregation of Revenue
Total net sales	65,152	62,717	176,250	198,179
Rail, Technologies, and Services | Over time
Disaggregation of Revenue
Total net sales	12,636	16,781	31,526	49,536
Infrastructure Solutions
Disaggregation of Revenue
Total net sales	60,498	57,968	171,860	154,867
Infrastructure Solutions | Point in time
Disaggregation of Revenue
Total net sales	39,621	33,462	109,433	98,246
Infrastructure Solutions | Over time
Disaggregation of Revenue
Total net sales	$ 20,877	$ 24,506	$ 62,427	$ 56,621