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Note 2 - Accounting Policies (Details) - Financial Data for Variable Interest Entities - Balance Sheet (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Financial Data for Variable Interest Entities - Balance Sheet [Abstract]    
Current assets $ 57,046aegn_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets $ 55,651aegn_VariableInterestEntityConsolidatedCarryingAmountCurrentAssets
Non-current assets 43,165aegn_VariableInterestEntityConsolidatedCarryingAmountNoncurrentAssets 47,606aegn_VariableInterestEntityConsolidatedCarryingAmountNoncurrentAssets
Current liabilities 22,525aegn_VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities 33,886aegn_VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities
Non-current liabilities $ 36,155aegn_VariableInterestEntityConsolidatedCarryingAmountNoncurrentLiabilities $ 25,020aegn_VariableInterestEntityConsolidatedCarryingAmountNoncurrentLiabilities