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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical)
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Dec. 31, 2012
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|---|---|
| 4 percent Convertible Senior Notes | |
| Stated interest rate | 4.00% |
| Convertible debt | 4 percent Convertible Senior Notes | |
| Stated interest rate | 4.00% |
| Convertible subordinated debt | 1 7/8 percent Convertible Senior Subordinated Notes | |
| Stated interest rate | 1.875% |