Business Segments - Schedule of Asset Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information
Depreciation/Amortization	$ 3,427	$ 3,591
Expenditures for Long-Lived Assets	2,575	2,712
Assets	342,826		$ 334,550
Operating Segments
Segment Reporting Information
Depreciation/Amortization	2,932	3,132
Expenditures for Long-Lived Assets	2,465	2,569
Assets	281,022		282,614
Corporate
Segment Reporting Information
Depreciation/Amortization	495	459
Expenditures for Long-Lived Assets	110	143
Assets	61,804		51,936
Rail, Technologies, and Services | Operating Segments
Segment Reporting Information
Depreciation/Amortization	1,168	1,221
Expenditures for Long-Lived Assets	427	536
Assets	149,333		158,859
Infrastructure Solutions | Operating Segments
Segment Reporting Information
Depreciation/Amortization	1,764	1,911
Expenditures for Long-Lived Assets	2,038	$ 2,033
Assets	$ 131,689		$ 123,755