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SUBSEQUENT EVENTS - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025 | Dec. 31, 2024
Restricted stock based awards |  |  |
Subsequent Event [Line Items] |  |  |
Fair value of restricted common stock units issued by CoreCivic to certain of its employees and non-employee directors |  | $ 23.9 | $ 23.5
Restricted stock based awards | Employees And Non Employee Directors |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic |  | 1.2 | 1.6
Restricted stock based awards | Officers and Executive Officers, Performance-Based |  |  |
Subsequent Event [Line Items] |  |  |
Vesting description |  | CoreCivic has established performance-based vesting conditions on a portion of the RSUs awarded to its officers and executive officers that, unless earlier vested under the terms of the agreements, are subject to vesting over a three-year period based upon the satisfaction of certain annual performance criteria. The RSUs awarded to officers and executive officers in 2023, 2024 and 2025 consist of a combination of awards with performance-based conditions and time-based conditions. Unless earlier vested under the terms of the RSU agreements, the RSUs with time-based vesting conditions vest in equal amounts over three years on the later of (i) the anniversary date of the grant or (ii) the delivery of the audited financial statements by the Company's independent registered public accountant for the applicable fiscal year. The RSUs with performance-based vesting conditions are divided into one-third increments, each of which is subject to vesting based upon satisfaction of certain annual performance criteria established at the beginning of the fiscal years ending December 31, 2023, 2024, and 2025 for the 2023 awards, December 31, 2024, 2025, and 2026 for the 2024 awards, and December 31, 2025, 2026, and 2027 for the 2025 awards, and which can be increased up to 150% or decreased to 0% based on performance relative to the annual performance criteria, and further increased or decreased using a modifier of 80% to 120% based on CoreCivic's total shareholder return relative to a peer group. Based on performance achieved for 2025, the RSUs subject to performance-based vesting criteria were increased by 150%; and were further increased by a 114.9% modifier based on CoreCivic's total shareholder return relative to the peer group. Because the performance criteria for the fiscal years ending December 31, 2026 and 2027 have not yet been established, the values of the third RSU increment of the 2024 awards and of the second and third increments of the 2025 awards for financial reporting purposes will not be determined until such criteria are established. A portion of the RSU award granted to CoreCivic's Chief Executive Officer ("CEO") in 2024 contains a single performance-based vesting condition that results in full vesting on the later of (i) the second anniversary of the award or (ii) the delivery of the audited financial statements by the Company's independent registered public accountant for the fiscal year ending December 31, 2025, if the performance criteria is met for the year ending December 31, 2025, or no vesting if the performance criteria is not met for such year. |
Restricted stock based awards | Employees, Time-Based |  |  |
Subsequent Event [Line Items] |  |  |
Vesting description |  | Time-based RSUs issued to other employees, unless earlier vested under the terms of the agreements, generally vest in equal amounts over three years on the later of (i) the anniversary date of the grant or (ii) the delivery of the audited financial statements by the Company's independent registered public accountant for the applicable fiscal year. |
Subsequent Event | Employees, Time-Based |  |  |
Subsequent Event [Line Items] |  |  |
Vesting description | Unless earlier vested under the terms of the RSU agreement, approximately 0.9 million RSUs with time-based vesting conditions vest in equal amounts over three years on the later of (i) the anniversary date of the grant or (ii) the delivery of the audited financial statements by the Company's independent registered public accounting firm for the applicable fiscal year. |  |
Subsequent Event | Restricted Stock Units | Employees And Non Employee Directors |  |  |
Subsequent Event [Line Items] |  |  |
Restricted common stock units issued by CoreCivic | 1.3 |  |
Fair value of restricted common stock units issued by CoreCivic to certain of its employees and non-employee directors | $ 24.8 |  |
Subsequent Event | Restricted Stock Units | Officers and Executive Officers, Performance-Based |  |  |
Subsequent Event [Line Items] |  |  |
Vesting description | Approximately 0.3 million RSUs with performance-based vesting conditions issued to officers and executive officers are divided into one-third increments, each of which is subject to vesting based upon satisfaction of certain annual performance criteria for the fiscal years ending December 31, 2026, 2027, and 2028, and which can be increased or decreased based on performance relative to the annual performance criteria, and further increased or decreased based on total shareholder return relative to a peer group. |  |
Subsequent Event | Restricted Stock Units | Non Employee Directors, Time-Based |  |  |
Subsequent Event [Line Items] |  |  |
Vesting description | Approximately 0.1 million RSUs issued to non-employee directors vest on the first anniversary of the award. Any RSUs that become vested will be settled in shares of CoreCivic's common stock. |  |

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