Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues	$ 938,585	$ 914,975	$ 726,866
Cost of revenues	735,461	685,395	536,275
Gross profit	203,124	229,580	190,591
Operating expenses	151,764	144,245	130,555
Earnout reversal	(1,700)	(1,700)	(1,600)
Acquisition-related expenses	6,372		8,494
Restructuring charges	2,151		4,025
Operating income	44,537	87,035	49,117
Other income (expense):
Interest expense	(15,075)	(8,691)	(8,296)
Interest income	347	332	520
Other	1,955	(947)	1,423
Total other expense	(12,773)	(9,306)	(6,353)
Income before taxes on income	31,764	77,729	42,764
Taxes on income	7,565	23,040	12,561
Income before equity in earnings of affiliated companies	24,199	54,689	30,203
Equity in earnings of affiliated companies	3,471	7,291	1,192
Income from continuing operations	27,670	61,980	31,395
Loss from discontinued operations		(100)	(4,070)
Net income	27,670	61,880	27,325
Non-controlling interests	(1,123)	(1,418)	(1,154)
Net income attributable to Aegion Corporation	$ 26,547	$ 60,462	$ 26,171
Basic:
Income from continuing operations (in Dollars per share)	$ 0.67	$ 1.55	$ 0.81
Loss from discontinued operations (in Dollars per share)		$ (0.01)	$ (0.11)
Net income (in Dollars per share)	$ 0.67	$ 1.54	$ 0.70
Diluted:
Income from continuing operations (in Dollars per share)	$ 0.67	$ 1.54	$ 0.81
Loss from discontinued operations (in Dollars per share)		$ (0.01)	$ (0.11)
Net income (in Dollars per share)	$ 0.67	$ 1.53	$ 0.70