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Stockholders Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Restricted stock based compensation |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Restricted common stock units issued by CCA to certain of its employees and non-employee directors |  |  | 635,000 |  | 438,000
Fair value of restricted common stock units issued by CCA to certain of its employees and non-employee directors |  |  | $ 18.5 |  | $ 17.5
Allocated share-based compensation expense | $ 6.2 | $ 3.7 | $ 13.9 | $ 10.9 |
Restricted common stock units remained outstanding and subject to vesting | 1,100,000 |  | 1,100,000 |  |
Restricted stock based compensation | Officers And Executive Officers |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Vesting period |  |  | 3 years |  |
Performance criteria, cumulative period |  |  | 3 years |  |
Percent of awards eligible to vest |  |  | 33.33% |  |
Restricted stock based compensation | Other Employees |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Vesting period, continuous service requirement |  |  | 3 years |  |
Restricted stock based compensation | Non Employee Directors |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Vesting period |  |  | 1 year |  |
Restricted stock based compensation | General and Administrative |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Restricted common stock units issued by CCA to certain of its employees and non-employee directors |  |  | 562,000 |  | 385,000
Allocated share-based compensation expense | $ 4.1 | 3.4 | $ 10.9 | 9.8 |
Restricted stock based compensation | Operating |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Restricted common stock units issued by CCA to certain of its employees and non-employee directors |  |  | 73,000 |  | 53,000
Allocated share-based compensation expense | 0.4 | $ 0.3 | $ 1.3 | 1.1 |
Restricted stock based compensation | Restructuring Charges |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Allocated share-based compensation expense | $ 1.7 |  | $ 1.7 |  |
Stock options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Common stock options outstanding | 1,300,000 |  | 1,300,000 |  |
Weighted average exercise price of common stock outstanding | $ 20.53 |  | $ 20.53 |  |
Stock options | General and Administrative |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |  |
Expense net of estimated forfeitures, relating to common stock options |  |  | $ 0.1 | $ 0.6 |

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