Business Segments - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information
Net Sales	$ 124,320	$ 115,488
Segment Operating Profit (Loss)	2,283	503
Operating Segments
Segment Reporting Information
Net Sales	124,320	115,488
Segment Operating Profit (Loss)	5,385	2,032
Rail, Technologies, and Services
Segment Reporting Information
Net Sales	82,623	64,384
Rail, Technologies, and Services | Operating Segments
Segment Reporting Information
Net Sales	82,623	64,384
Segment Operating Profit (Loss)	6,778	2,388
Infrastructure Solutions
Segment Reporting Information
Net Sales	41,697	51,104
Infrastructure Solutions | Operating Segments
Segment Reporting Information
Net Sales	41,697	51,104
Segment Operating Profit (Loss)	$ (1,393)	$ (356)