Revenue - Schedule of Sales by Major Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue
Total net sales	$ 143,558	$ 140,796	$ 241,350	$ 265,116
Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	75,973	85,594	129,988	168,217
Precast Concrete Products
Disaggregation of Revenue
Total net sales	46,174	33,950	74,378	55,041
Steel Products
Disaggregation of Revenue
Total net sales	21,411	21,252	36,984	41,858
Infrastructure Solutions
Disaggregation of Revenue
Total net sales	67,585	55,202	111,362	96,899
Rail Products | Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	47,570	56,323	76,889	109,361
Global Friction Management | Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	20,431	17,438	35,994	31,459
Technology Services and Solutions | Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	$ 7,972	$ 11,833	$ 17,105	$ 27,397