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Network
072 - Disclosure - Note 8 - Taxes on Income (Tax Benefits) (Detail) - Unrecognized Tax Benefits Reconciliation
(http://www.aegion.com/role/UnrecognizedTaxBenefitsReconciliationTable)
TableStatement [Table]
Slicers (applies to each fact value in each table cell)
Statement [Line Items]Period [Axis]
2012-01-01 - 2012-12-31
2011-01-01 - 2011-12-31
2010-01-01 - 2010-12-31
Disclosure [Axis]Disclosure [Axis]Disclosure [Axis]
Related To Acquisitions [Member]Not Related To Acquisitions [Member]Disclosure [Domain]Not Related To Acquisitions [Member]Disclosure [Domain]Not Related To Acquisitions [Member]Disclosure [Domain]
Balance at January 1,
 
 
1,050,000  
 
1,672,000  
 
2,624,000  
Additions for tax positions of prior years
3,145,000  
111,000  
 
41,000  
 
77,000  
 
Reductions for tax positions of prior years
 
 
 
 
(238,000) 
 
 
Lapse in statute of limitations
 
 
(1,162,000) 
 
(406,000) 
 
(1,076,000) 
Foreign currency translation
 
 
26,000  
 
(19,000) 
 
47,000  
Balance at December 31, total tax provision
 
 
 
 
3,170,000  
 
 
 
1,050,000  
 
 
 
1,672,000