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Common Stock Repurchases (Details) (USD $)
Share data in Thousands, unless otherwise specified |
1 Months Ended | 12 Months Ended |
|---|---|---|
|
Nov. 27, 2012
|
Dec. 31, 2012
|
|
| Short-term Debt [Line Items] | ||
| Proceeds from issuance of convertible notes | $ 100,000,000 | $ 115,000,000 |
| Common Stock Repurchases (Textual) [Abstract] | ||
| Share repurchase program authorized by Board of Directors | 50,000,000 | |
| Maximum share repurchasing ability | 50,000,000 | |
| Common stock shares repurchased | 1,900 | |
| Cost of common stock shares repurchased | 49,270,000 | |
| Balance available for repurchase under share repurchase program | 700,000 | |
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Convertible Notes Payable [Member]
|
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| Short-term Debt [Line Items] | ||
| Proceeds from issuance of convertible notes | $ 25,000,000 |