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Subsequent Events - Additional Information (Detail) - Restricted stock based awards - USD ($) shares in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
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Feb. 28, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Subsequent Event [Line Items] |  |  |
Fair value of restricted common stock units issued by CoreCivic to certain of its employees and non-employee directors |  | $ 20.9 | $ 20.1
Employees And Non Employee Directors |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic |  | 1.2 | 0.9
Officers And Executive Officers |  |  |
Subsequent Event [Line Items] |  |  |
Vesting period |  | 3 years |
Non Employee Directors |  |  |
Subsequent Event [Line Items] |  |  |
Vesting period |  | 1 year |
Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Fair value of restricted common stock units issued by CoreCivic to certain of its employees and non-employee directors | $ 15.4 |  |
Subsequent Event | Employees And Non Employee Directors |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic | 2.0 |  |
Subsequent Event | Officers And Executive Officers |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic | 1.0 |  |
Vesting period | 3 years |  |
Subsequent Event | Other Employees |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic | 0.8 |  |
Vesting period | 3 years |  |
Subsequent Event | Non Employee Directors |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic | 0.2 |  |
Vesting period | 1 year |  |

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- Definition Value of share instruments newly issued under a share-based compensation plan. + References No definition available. + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of shares issued under share-based payment arrangement. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&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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- Details
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