Revenue - Schedule of Timing of Transfer (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
Point in time
Disaggregation of Revenue
Total net sales	107,358	105,050	180,910	200,246
Over time
Disaggregation of Revenue
Total net sales	36,200	35,746	60,440	64,870
Rail, Technologies, and Services
Disaggregation of Revenue
Total net sales	75,973	85,594	129,988	168,217
Rail, Technologies, and Services | Point in time
Disaggregation of Revenue
Total net sales	66,173	69,923	111,098	135,462
Rail, Technologies, and Services | Over time
Disaggregation of Revenue
Total net sales	9,800	15,671	18,890	32,755
Infrastructure Solutions
Disaggregation of Revenue
Total net sales	67,585	55,202	111,362	96,899
Infrastructure Solutions | Point in time
Disaggregation of Revenue
Total net sales	41,185	35,127	69,812	64,784
Infrastructure Solutions | Over time
Disaggregation of Revenue
Total net sales	$ 26,400	$ 20,075	$ 41,550	$ 32,115