Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 1,027,963	$ 938,585	$ 914,975
Cost of revenues	784,854	735,461	685,395
Gross profit	243,109	203,124	229,580
Operating expenses	170,882	151,764	144,245
Earnout reversal	(10,019)	(1,700)	(1,700)
Acquisition-related expenses	3,124	6,372
Restructuring charges		2,151
Operating income	79,122	44,537	87,035
Other income (expense):
Interest expense	(10,208)	(15,075)	(8,691)
Interest income	506	347	332
Other	(1,457)	1,955	(947)
Total other expense	(11,159)	(12,773)	(9,306)
Income before taxes on income	67,963	31,764	77,729
Taxes on income	17,473	7,565	23,040
Income before equity in earnings of affiliated companies	50,490	24,199	54,689
Equity in earnings of affiliated companies	6,359	3,471	7,291
Income from continuing operations	56,849	27,670	61,980
Loss from discontinued operations			(100)
Net income	56,849	27,670	61,880
Non-controlling interests	(4,188)	(1,123)	(1,418)
Net income attributable to Aegion Corporation	$ 52,661	$ 26,547	$ 60,462
Basic:
Income from continuing operations (in Dollars per share)	$ 1.34	$ 0.67	$ 1.55
Loss from discontinued operations (in Dollars per share)			$ (0.01)
Net income (in Dollars per share)	$ 1.34	$ 0.67	$ 1.54
Diluted:
Income from continuing operations (in Dollars per share)	$ 1.33	$ 0.67	$ 1.54
Loss from discontinued operations (in Dollars per share)			$ (0.01)
Net income (in Dollars per share)	$ 1.33	$ 0.67	$ 1.53