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Stockholders' Equity and Stock Incentive Plans (Share Repurchase Program) (Details) (USD $)
In Millions, unless otherwise specified |
6 Months Ended |
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Jun. 30, 2012
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
| Stock repurchase program, authorized amount | $ 100 |
| Stock repurchase program, remaining authorized repurchase amount | $ 92.1 |