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Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified |  | 0 Months Ended |
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Jul. 20, 2012 Restricted Stock Adjustments [Member] metrics | Aug. 08, 2012 Dividend Declared [Member] | Jul. 28, 2012 Gross Receipts Tax [Member] | Jul. 20, 2012 Restricted Stock [Member] Restricted Stock Adjustments [Member] | Jul. 20, 2012 Maximum [Member] Restricted Stock [Member] Restricted Stock Adjustments [Member]
Subsequent Event [Line Items] |  |  |  |  |
Number of annual performance metrics | 2 |  |  |  |
Subsequent Events (Textual) [Abstract] |  |  |  |  |
Restricted Stock, Maximum Percentage of Shares Can Be Vested Meeting Earnings Per Share Performance Targets |  |  |  |  | 75.00%
Restricted Stock, Maximum Percentage of Shares Can Be Vested Meeting Capital Performance Targets |  |  |  | 25.00% |
Common Stock, Dividends, Per Share, Declared |  | $ 0.20 |  |  |
Proceeds from Income Tax Refunds |  |  | $ 6.0 |  |

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- Definition Number of annual performance metrics for the performance-based equity grants under GEO's equity incentive plans. + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Weighted Towards Capital Performance Targets + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Weighted Towards Earnings Per Share Performance + References No definition available. + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 29 -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 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585 + Details
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