Business Segments - Schedule of Asset Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Segment Reporting Information
Depreciation/Amortization	$ 2,968	$ 3,486	$ 9,502	$ 10,562
Expenditures for Long-Lived Assets	2,809	3,067	8,057	7,834
Assets	333,889		333,889		$ 334,550
Operating Segments
Segment Reporting Information
Depreciation/Amortization	2,447	3,019	7,972	9,172
Expenditures for Long-Lived Assets	2,400	2,816	6,950	6,865
Assets	279,710		279,710		282,614
Corporate
Segment Reporting Information
Depreciation/Amortization	521	467	1,530	1,390
Expenditures for Long-Lived Assets	409	251	1,107	969
Assets	54,179		54,179		51,936
Rail, Technologies, and Services | Operating Segments
Segment Reporting Information
Depreciation/Amortization	793	1,202	2,874	3,578
Expenditures for Long-Lived Assets	350	1,147	1,405	1,765
Assets	148,746		148,746		158,859
Infrastructure Solutions | Operating Segments
Segment Reporting Information
Depreciation/Amortization	1,654	1,817	5,098	5,594
Expenditures for Long-Lived Assets	2,050	$ 1,669	5,545	$ 5,100
Assets	$ 130,964		$ 130,964		$ 123,755