Note 2 - Summary of Accounting Policies (Detail) - Consolidated Variable Interest Entities - Balance Sheet Data (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets	$ 65,251	$ 40,525
Non-current assets	47,086	19,005
Current liabilities	45,604	23,566
Non-current liabilities	$ 23,169	$ 14,573

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