Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Total net sales	$ 154,522	$ 141,563	$ 270,602	$ 263,470
Total cost of sales	128,361	113,425	225,611	212,210
Gross profit	26,161	28,138	44,991	51,260
Selling and administrative expenses	19,767	18,870	37,793	39,207
Amortization expense	1,470	1,413	2,935	2,843
Interest expense - net	861	1,089	1,732	1,901
Other expense (income) - net	70	(2,306)	129	(1,700)
Income from continuing operations before income taxes	3,993	9,072	2,402	9,009
Income tax expense from continuing operations	1,139	2,102	818	2,044
Income from continuing operations	2,854	6,970	1,584	6,965
Net loss attributable to noncontrolling interest	(22)	0	(34)	0
Income from continuing operations attributable to L.B. Foster Company	2,876	6,970	1,618	6,965
Discontinued operations:
Loss from discontinued operations before income taxes	0	(7,456)	0	(10,087)
Income tax benefit from discontinued operations	0	(1,009)	0	(1,779)
Loss from discontinued operations	0	(6,447)	0	(8,308)
Net income (loss) attributable to L.B. Foster Company	$ 2,876	$ 523	$ 1,618	$ (1,343)
Basic income (loss) per common share:
From continuing operations (usd per share)	$ 0.27	$ 0.66	$ 0.15	$ 0.66
From discontinued operations (usd per share)	0	(0.61)	0	(0.79)
Basic income (loss) per common share (usd per share)	0.27	0.05	0.15	(0.13)
Diluted income (loss) per common share:
From continuing operations (usd per share)	0.27	0.66	0.15	0.66
From discontinued operations (usd per share)	0	(0.61)	0	(0.79)
Diluted income (loss) per common share (usd per share)	$ 0.27	$ 0.05	$ 0.15	$ (0.13)
Sales of goods
Total net sales	$ 138,309	$ 122,879	$ 238,855	$ 219,267
Total cost of sales	115,087	100,177	199,212	180,656
Sales of services
Total net sales	16,213	18,684	31,747	44,203
Total cost of sales	$ 13,274	$ 13,248	$ 26,399	$ 31,554