Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 297,686	$ 337,096	$ 591,594	$ 646,262
Cost of revenues	236,496	265,043	475,990	515,019
Gross profit	61,190	72,053	115,604	131,243
Operating expenses	50,806	57,326	101,531	106,410
Acquisition-related expenses	704	0	1,735	323
Restructuring charges	1,535	204	8,332	862
Operating income	8,145	14,523	4,006	23,648
Other income (expense):
Interest expense	(3,641)	(2,989)	(7,256)	(6,221)
Interest income	128	78	160	204
Other	(498)	778	(1,471)	(2,001)
Total other expense	(4,011)	(2,133)	(8,567)	(8,018)
Income (loss) before taxes on income	4,134	12,390	(4,561)	15,630
Taxes (benefit) on income	941	3,542	(3,805)	5,410
Net income (loss)	3,193	8,848	(756)	10,220
Non-controlling interests (income) loss	229	(164)	386	(177)
Net income (loss) attributable to Aegion Corporation	$ 3,422	$ 8,684	$ (370)	$ 10,043
Earnings (loss) per share attributable to Aegion Corporation:
Net income (loss) per share, basic (in dollars per share)	$ 0.10	$ 0.24	$ (0.01)	$ 0.27
Net income (loss) per share, diluted (in dollars per share)	$ 0.10	$ 0.24	$ (0.01)	$ 0.27