CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Total net sales (Note 3)	$ 530,765	$ 543,744
Total cost of sales	412,703	431,700
Gross profit	118,062	112,044
Selling and administrative expenses	96,398	97,623
(Gain) on sale of former joint venture facility	(3,477)	0
Amortization expense (Note 4)	4,628	5,314
Operating income	20,513	9,107
Interest expense - net	4,992	5,528
Other expense - net (Note 18)	1,076	2,635
Income before income taxes	14,445	944
Income tax benefit (Note 13)	(28,398)	(355)
Net income	42,843	1,299
Net loss attributable to noncontrolling interest	(103)	(165)
Net income attributable to L.B. Foster Company	$ 42,946	$ 1,464
Basic earnings per common share (Note 12) (usd per share)	$ 4.01	$ 0.14
Diluted earnings per common share (Note 12) (usd per share)	$ 3.89	$ 0.13
Basic weighted average shares outstanding (in shares)	10,721	10,799
Diluted weighted average shares outstanding (in shares)	11,048	10,995
Sales of goods
Total net sales (Note 3)	$ 462,659	$ 475,350
Total cost of sales	352,556	368,197
Sales of services
Total net sales (Note 3)	68,106	68,394
Total cost of sales	$ 60,147	$ 63,503