Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Total net sales (Note 4)	$ 513,620	$ 497,411
Total cost of sales	427,318	402,405
Gross profit	86,302	95,006
Selling and administrative expenses	75,995	73,644
Amortization expense (Note 5)	5,836	5,729
Operating profit	4,471	15,633
Interest expense - net	2,956	3,761
Other income - net (Note 19)	(3,075)	(2,110)
Income from continuing operations before income taxes	4,590	13,982
Income tax expense (benefit) (Note 14)	1,119	(11,841)
Income from continuing operations	3,471	25,823
Net loss attributable to noncontrolling interest	(83)	0
Income from continuing operations attributable to L.B. Foster Company	3,554	25,823
Income (loss) from discontinued operations before income taxes	72	(23,979)
Income tax benefit (Note 14)	0	(5,738)
Income (loss) from discontinued operations (Note 3)	72	(18,241)
Net income attributable to L.B. Foster Company	$ 3,626	$ 7,582
Basic earnings (loss) per common share from continuing operations (usd per share)	$ 0.33	$ 2.45
Basic earnings (loss) per common share from discontinued operations (usd per share)	0.01	(1.73)
Basic earnings per common share (usd per share)	0.34	0.72
Diluted earnings (loss) per common share from continuing operations (usd per share)	0.33	2.42
Diluted earnings (loss) per common share from discontinued operations (usd per share)	0.01	(1.71)
Diluted earnings per common share (usd per share)	$ 0.34	$ 0.71
Sales of goods
Total net sales (Note 4)	$ 450,241	$ 421,307
Total cost of sales	374,366	344,306
Sales of services
Total net sales (Note 4)	63,379	76,104
Total cost of sales	$ 52,952	$ 58,099