Note 2 - Accounting Policies (Detail) - Financial Data for Variable Interest Entities - Balance Sheet (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets	$ 52,119	$ 65,251
Non-current assets	47,840	47,086
Current liabilities	29,086	45,604
Non-current liabilities	$ 26,117	$ 23,169

The carrying amount of the consolidated Variable Interest Entity's current liabilities included in the reporting entity's statement of financial position.

No definition available.

Name:	aegn_VariableInterestEntityConsolidatedCarryingAmountCurrentLiabilities
Namespace Prefix:	aegn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant