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Treasury Stock and Share-Based Awards - Summary of Restricted Stock and Restricted Stock Unit Award Activity (Detail) - USD ($) shares in Thousands, $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Restricted Stock (Member) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of performance stock units that vested during the period |  | 1,310 |
Fair value of restricted stock that vested during the period |  | $ 39.2 | $ 14.8
Compensation expense recognized during the period |  | 12.6 | 13.3
Income tax benefit (expense) related to performance stock units |  | 7.0 | $ 2.1
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Estimated remaining expense | [1] | $ 19.5 |
Performance Shares [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of performance stock units that vested during the period |  | 800 | 100
Fair value of restricted stock that vested during the period |  | $ 20.6 | $ 2.1
Accumulated dividends paid upon vesting of performance stock units |  | 0.0 | 0.1
Compensation expense recognized during the period | [2] | 12.5 | 10.8
Income tax benefit (expense) related to performance stock units |  | 2.5 | (1.2)
Cinemark Holdings Inc [Member] | Restricted Stock (Member) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Fair value of restricted stock that vested during the period |  | 2.4 | 1.4
Compensation expense recognized during the period |  | 1.0 | 1.0
Income tax benefit (expense) related to performance stock units |  | 0.5 | 0.3
Cinemark Holdings Inc [Member] | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Estimated remaining expense |  | 0.9 |
Cinemark Partners Second [Member] | Restricted Stock (Member) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Fair value of restricted stock that vested during the period |  | 36.8 | 13.4
Compensation expense recognized during the period | [3] | 11.6 | 12.3
Income tax benefit (expense) related to performance stock units |  | 6.5 | $ 1.8
Cinemark Partners Second [Member] | Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Estimated remaining expense | [1] | $ 18.6 |
[1] | The weighted average period over which this remaining compensation expense will be recognized by both Holdings and CUSA is approximately 1.3 years.
[2] | Compensation expense for the nine months ended September 30, 2025 includes approximately $2.4 related to a change in the most likely performance metrics outcome estimated to be achieved for the 2024 grants. Compensation expense for the nine months ended September 30, 2024 includes approximately $2.8 related to a change in the most likely performance metrics outcome estimated to be achieved for the 2023 and 2024 grants.
[3] | Compensation expense for the nine months ended September 30, 2025 and 2024 includes approximately $0.9 and $0.6, respectively, related to a portion of the short-term field incentive compensation plan for 2025 and 2024, respectively, to be settled in restricted stock.

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