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Subsequent Events - Additional Information (Details) - shares |  | 12 Months Ended
--- | --- | ---
Feb. 09, 2023 | Dec. 31, 2022
Subsequent Event [Line Items] |  |
Options granted (in shares) |  | 342,000
Subsequent Events |  |
Subsequent Event [Line Items] |  |
Options granted (in shares) | 362,000 |
Restricted Stock Award | Subsequent Events |  |
Subsequent Event [Line Items] |  |
Number of shares granted | 1,151,000 |
Performance Shares | Subsequent Events |  |
Subsequent Event [Line Items] |  |
Number of shares granted | 339,000 |
Performance period | 3 years |

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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Award Performance Period + References No definition available. + Details
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Namespace Prefix: | geo_
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Balance Type: | na
Period Type: | duration

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- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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Balance Type: | na
Period Type: | duration

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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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