Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill
Goodwill, beginning balance	$ 30,733	$ 20,152
Acquisitions	1,336	13,770
Foreign currency translation impact	518	(178)
Impairment charges		(3,011)
Goodwill, ending balance	32,587	30,733
Rail, Technologies, and Services
Goodwill
Goodwill, beginning balance	19,948	14,577
Acquisitions	0	5,549
Foreign currency translation impact	518	(178)
Impairment charges		0
Goodwill, ending balance	20,466	19,948
Infrastructure Solutions
Goodwill
Goodwill, beginning balance	10,785	5,575
Acquisitions	1,336	8,221
Foreign currency translation impact	0	0
Impairment charges		(3,011)
Goodwill, ending balance	$ 12,121	$ 10,785