Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenues	$ 356,595	$ 350,138	$ 1,002,857	$ 979,240
Cost of revenues	279,474	286,199	794,493	782,320
Gross profit	77,121	63,939	208,364	196,920
Operating expenses	51,554	66,977	157,964	169,666
Definite-lived intangible asset impairment	0		0	10,896
Acquisition-related expenses	457	0	780	539
Restructuring charges	172	0	1,034	0
Operating income (loss)	24,938	(13,934)	48,586	15,819
Other income (expense):
Interest expense	(3,144)	(3,258)	(9,365)	(9,693)
Interest income	25	102	229	479
Other	(359)	(367)	(2,360)	(1,830)
Total other expense	(3,478)	(3,523)	(11,496)	(11,044)
Income (loss) before taxes on income	21,460	(17,457)	37,090	4,775
Taxes (benefit) on income (loss)	6,237	(1,356)	11,647	4,217
Income (loss) before equity in earnings of affiliated companies	15,223	(16,101)	25,443	558
Equity in earnings of affiliated companies	0	0	0	677
Income (loss) from continuing operations	15,223	(16,101)	25,443	1,235
Loss from discontinued operations	0	(130)	0	(626)
Net income (loss)	15,223	(16,231)	25,443	609
Non-controlling interests	(473)	(823)	(650)	(880)
Net income (loss) attributable to Aegion Corporation	$ 14,750	$ (17,054)	$ 24,793	$ (271)
Basic:
Income from continuing operations (in dollars per share)	$ 0.41	$ (0.45)	$ 0.68	$ 0.01
Loss from discontinued operations (in dollars per share)	0.00	0.00	0.00	(0.02)
Net income (in dollars per share)	0.41	(0.45)	0.68	(0.01)
Diluted:
Income from continuing operations (in dollars per share)	0.40	(0.45)	0.67	0.01
Loss from discontinued operations (in dollars per share)	0.00	0.00	0.00	(0.02)
Net income (in dollars per share)	$ 0.40	$ (0.45)	$ 0.67	$ (0.01)