Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 3,193	$ 8,848	$ (756)	$ 10,220
Other comprehensive income (loss):
Currency translation adjustments		(399)	(2,379)	(957)	(18,475)
Pension activity, net of tax	[1]	(52)	(25)	(173)	(4)
Deferred gain (loss) on hedging activity, net of tax	[2]	(486)	(25)	(4,059)	384
Total comprehensive income (loss)		2,256	6,419	(5,945)	(7,875)
Comprehensive loss attributable to non-controlling interests		313	497	228	1,491
Comprehensive income (loss) attributable to Aegion Corporation		2,569	6,916	(5,717)	(6,384)
Pension activity, tax (benefit) expense		13	6	43	1
Deferred gain on hedging activity, tax		$ (325)	$ (14)	$ (2,717)	$ 256

[1] Amounts presented net of tax of $(13) and $(6) for the quarters ended June 30, 2016 and 2015, respectively, and $(43) and $(1) for the six months ended June 30, 2016 and 2015, respectively.

[2] Amounts presented net of tax of $(325) and $(14) for the quarters ended June 30, 2016 and 2015, respectively, and $(2,717) and $256 for the six months ended June 30, 2016 and 2015, respectively.