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Long-Term Debt (Debt Amounts Included In Consolidated Balance Sheet) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Long-Term Debt [Abstract]
Principal amount of convertible debentures	$ 186,956	$ 186,956
Unamortized debt discount	(22,115)	(27,748)
Carrying amount of convertible debentures	164,841	159,208
Additional paid in capital (net of tax)	$ 31,310	$ 31,310

Additional paid-in capital or capital from other sources not otherwise defined. Use this element if the registrant wishes to distinguish between Additional paid-in capital from Other Additional Capital. The following adjustments are some examples of Other Additional Capital: recording the issuance of debt issued with a beneficial conversion feature, the issuance of convertible debt at a substantial premium, certain tax consequences of equity instruments awarded to employees, and accounting for certain expenses and liabilities paid for by the principal shareholder.

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