Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 7,753	$ (3,949)
Other comprehensive income (loss):
Currency translation adjustments		3,869	(557)
Deferred gain (loss) on hedging activity, net of tax	[1]	483	(3,573)
Pension activity, net of tax	[2]	(5)	(122)
Total comprehensive income (loss)		12,100	(8,201)
Comprehensive income attributable to non-controlling interests		(1,869)	(85)
Comprehensive income (loss) attributable to Aegion Corporation		10,231	(8,286)
Deferred gain on hedging activity, tax		321	(2,392)
Pension activity, tax (benefit) expense		$ (1)	$ (30)

[1] Amounts presented net of tax of $321 and $(2,392) for the quarters ended March 31, 2017 and 2016, respectively.

[2] Amounts presented net of tax of $(1) and $(30) for the quarters ended March 31, 2017 and 2016, respectively.