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Stockholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
1 Months Ended | 23 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | |||||||||
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Aug. 31, 2011
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May 31, 2011
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Feb. 28, 2010
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Dec. 31, 2011
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Mar. 31, 2012
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Mar. 31, 2012
Restricted Stock [Member]
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Mar. 31, 2011
Restricted Stock [Member]
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Dec. 31, 2011
Restricted Stock [Member]
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Mar. 31, 2012
Stock Options [Member]
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Mar. 31, 2011
Stock Options [Member]
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Dec. 31, 2011
Stock Options [Member]
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Mar. 31, 2012
General And Administrative Expense [Member]
Restricted Stock [Member]
|
Mar. 31, 2011
General And Administrative Expense [Member]
Restricted Stock [Member]
|
Dec. 31, 2011
General And Administrative Expense [Member]
Restricted Stock [Member]
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Mar. 31, 2012
Operating Expense [Member]
Restricted Stock [Member]
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Mar. 31, 2011
Operating Expense [Member]
Restricted Stock [Member]
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Dec. 31, 2011
Operating Expense [Member]
Restricted Stock [Member]
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Mar. 31, 2012
Officers And Executive Officers [Member]
Restricted Stock [Member]
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Mar. 31, 2012
Other Employees [Member]
Restricted Stock [Member]
|
Dec. 31, 2011
Non-Employee Directors [Member]
General And Administrative Expense [Member]
Restricted Stock [Member]
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Mar. 31, 2012
Executive Officers [Member]
Stock Options [Member]
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Mar. 31, 2012
Other Officers [Member]
Stock Options [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||||||||||||||||||||
| Approval of share repurchase program of CCA's common stock by company's Board of Directors | $ 500.0 | $ 350.0 | $ 250.0 | |||||||||||||||||||
| Increased aggregate value of shares authorized for repurchase under share repurchase program | 100.0 | |||||||||||||||||||||
| Common stock repurchased by CCA, shares | 17,700,000 | |||||||||||||||||||||
| Common stock repurchased by CCA | 383.2 | |||||||||||||||||||||
| Common stock repurchased by CCA, average price per share | $ 21.63 | |||||||||||||||||||||
| Restricted common stock and common stock units and stock options issued by CCA to certain of its employees | 346,000 | 706,000 | 575,000 | 287,000 | 227,000 | 59,000 | 38,000 | 265,000 | ||||||||||||||
| Fair value of restricted common stock and common stock units and stock options issued by CCA to certain of its employees | 9.1 | 6.5 | 5.3 | 5.6 | ||||||||||||||||||
| Vesting period | 3 years | 3 years | 4 years | |||||||||||||||||||
| Performance criteria, cumulative period | 3 years | |||||||||||||||||||||
| Percent of awards eligible to vest | 0.33% | 0.33% | 0.25% | |||||||||||||||||||
| Vesting period, continuous service requirement | 3 years | |||||||||||||||||||||
| Allocated share-based compensation expense | 1.6 | 1.5 | 1.4 | 1.2 | 0.2 | 0.3 | ||||||||||||||||
| Restricted common stock and common stock units outstanding subject to vesting | 810,000 | |||||||||||||||||||||
| Expense net of forfeitures, relating to common stock options | $ 1.1 | $ 1.2 | ||||||||||||||||||||
| Weighted average exercise price of common stock shares issued to directors, officers and executive officers | $ 26.26 | $ 24.45 | ||||||||||||||||||||
| Common stock options outstanding | 4,200,000 | |||||||||||||||||||||
| Weighted average exercise price of common stock outstanding | $ 20.36 | |||||||||||||||||||||