Note 2 - Accounting Policies (Detail) - Financial Data for Variable Interest Entities - Balance Sheet (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets	$ 61,723	$ 40,525
Non-current assets	40,420	19,005
Current liabilities	$ 42,189	$ 23,566

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