Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenues	$ 1,333,570	$ 1,331,421	$ 1,091,420
Cost of revenues	1,057,783	1,051,438	844,399
Gross profit	275,787	279,983	247,021
Operating expenses	209,477	234,105	178,483
Goodwill impairment	43,484	51,512	0
Definite-lived intangible asset impairment	0	12,116	0
Earnout reversal	0	0	(4,175)
Acquisition-related expenses	1,912	1,375	5,831
Restructuring charges	968	687	0
Operating income (loss)	19,946	(19,812)	66,882
Other income (expense):
Interest expense	(16,044)	(12,943)	(13,169)
Interest income	218	633	325
Other	(2,905)	(3,853)	4,964
Total other expense	(18,731)	(16,163)	(7,880)
Income (loss) before taxes on income	1,215	(35,975)	59,002
Taxes (benefit) on income (loss)	9,205	(3,840)	12,154
Income (loss) before equity in earnings of affiliated companies	(7,990)	(32,135)	46,848
Equity in earnings of affiliated companies	0	570	5,159
Income (loss) from continuing operations	(7,990)	(31,565)	52,007
Loss from discontinued operations	0	(3,847)	(6,461)
Net income (loss)	(7,990)	(35,412)	45,546
Non-controlling interests	(77)	(1,755)	(1,195)
Net income (loss) attributable to Aegion Corporation	$ (8,067)	$ (37,167)	$ 44,351
Basic:
Income from continuing operations (in Dollars per share)	$ (0.22)	$ (0.88)	$ 1.31
Loss from discontinued operations (in Dollars per share)	0.00	(0.10)	(0.17)
Net income (in Dollars per share)	(0.22)	(0.98)	1.14
Diluted:
Income (loss) from continuing operations (in Dollars per share)	(0.22)	(0.88)	1.30
Loss from discontinued operations (in Dollars per share)	0.00	(0.10)	(0.17)
Net income (loss) (in Dollars per share)	$ (0.22)	$ (0.98)	$ 1.13