Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 15,223	$ (16,231)	$ 25,443	$ 609
Other comprehensive income (loss):
Currency translation adjustments		(2,963)	(16,693)	(21,438)	(17,473)
Pension activity, net of tax	[1]	16	(8)	12	(3)
Deferred gain (loss) on hedging activity, net of tax	[2]	(274)	453	110	641
Total comprehensive income (loss)		12,002	(32,479)	4,127	(16,226)
Add: comprehensive income (loss) attributable to non-controlling interests		(700)	(285)	791	(308)
Comprehensive income (loss) attributable to Aegion Corporation		$ 11,302	$ (32,764)	$ 4,918	$ (16,534)

[1] Amounts presented net of tax of $4 and $(3) for the quarters ended September 30, 2015 and 2014, respectively, and $3 and $(1) for the nine months ended September 30, 2015 and 2014, respectively.

[2] Amounts presented net of tax of $(183) and $298 for the quarters ended September 30, 2015 and 2014, respectively, and $74 and $422 for the nine months ended September 30, 2015 and 2014, respectively.