Note 2 - Accounting Policies (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Number of Components	3
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures (in Dollars)	$ 27,508	$ 26,680
Number of Steps, VIE	2
Number of Options	2
Number of Financial Statements	2
Number of Steps, Impairment	2
Likelihood	50.00%
Bayou Coating [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.00%
Minimum [Member]
Equity Method Investment, Ownership Percentage	20.00%
Maximum [Member]
Equity Method Investment, Ownership Percentage	50.00%
Bayou Delta [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	41.00%

Definition of more likely than no threshold in ASU No. 2011-08

No definition available.

Name:	aegn_Likelihood
Namespace Prefix:	aegn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of components included within the Company's accumulated other comprehensive income

+ References

No definition available.

+ Details

Name:	aegn_NumberOfComponents
Namespace Prefix:	aegn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of financial statement options allowed by ASU No 2011-05

+ References

No definition available.

+ Details

Name:	aegn_NumberOfFinancialStatements
Namespace Prefix:	aegn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of options allowed by ASU No. 2011-05 for presenting components of net income and other comprehensive income

+ References

No definition available.

+ Details

Name:	aegn_NumberOfOptions
Namespace Prefix:	aegn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of steps included in two-step goodwill impairment test

+ References

No definition available.

+ Details

Name:	aegn_NumberOfStepsImpairment
Namespace Prefix:	aegn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of steps included for evaluating transacations and relationships under VIE requirements

+ References

No definition available.

+ Details

Name:	aegn_NumberOfStepsVIE
Namespace Prefix:	aegn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant