Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill
Goodwill, beginning balance	$ 20,152
Skratch acquisition	5,343
Foreign currency translation impact	(924)
Goodwill, ending balance	24,571
Rail, Technologies, and Services
Goodwill
Goodwill, beginning balance	14,577
Skratch acquisition	5,343
Foreign currency translation impact	(924)
Goodwill, ending balance	18,996
Precast Concrete Products
Goodwill
Goodwill, beginning balance	2,564
Skratch acquisition	0
Foreign currency translation impact	0
Goodwill, ending balance	2,564
Steel Products and Measurement
Goodwill
Goodwill, beginning balance	3,011
Skratch acquisition	0
Foreign currency translation impact	0
Goodwill, ending balance	$ 3,011