Business Segments - Schedule of Asset Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting Information
Depreciation/Amortization	$ 3,107	$ 3,485	$ 6,534	$ 7,076
Expenditures for Long-Lived Assets	2,673	2,054	5,248	4,766
Assets	349,925		349,925		$ 334,550
Operating Segments
Segment Reporting Information
Depreciation/Amortization	2,592	3,018	5,524	6,151
Expenditures for Long-Lived Assets	2,085	1,480	4,550	4,049
Assets	290,619		290,619		282,614
Corporate
Segment Reporting Information
Depreciation/Amortization	515	467	1,010	925
Expenditures for Long-Lived Assets	588	574	698	717
Assets	59,306		59,306		51,936
Rail, Technologies, and Services | Operating Segments
Segment Reporting Information
Depreciation/Amortization	913	1,154	2,081	2,375
Expenditures for Long-Lived Assets	628	82	1,055	618
Assets	156,055		156,055		158,859
Infrastructure Solutions | Operating Segments
Segment Reporting Information
Depreciation/Amortization	1,679	1,864	3,443	3,776
Expenditures for Long-Lived Assets	1,457	$ 1,398	3,495	$ 3,431
Assets	$ 134,564		$ 134,564		$ 123,755