XML 68 R66.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Condensed Consolidating Financial Information (Details Textual) | Sep. 30, 2012 | Oct. 20, 2009
--- | --- | ---
Debt Instrument [Line Items] |  |
Notes bear interest at a rate | 7.75% |
Senior Notes Due 2012 [Member] |  |
Debt Instrument [Line Items] |  |
Notes bear interest at a rate | 6.625% |
Senior Note Due 2017 [Member] |  |
Debt Instrument [Line Items] |  |
Notes bear interest at a rate | 7.75% |
Senior Notes Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Notes bear interest at a rate | 6.625% |
Condensed Consolidating Financial Information (Textual) [Abstract] |  |
Percentage of subsidiary owned | 100.00% |
Seven Point Seven Five Percent Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Notes bear interest at a rate | 7.75% | 7.75%

X
- Details
Name: | geo_CondensedConsolidatingFinancialInformationTextualAbstract
Namespace Prefix: | geo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of subsidiary owned. + References No definition available. + Details
Name: | geo_PercentageOfSubsidiaryOwned
Namespace Prefix: | geo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration