Long-Term Debt (Debt Amounts Included In Consolidated Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Long-Term Debt [Abstract]
Principal amount of convertible debentures	$ 186,956	$ 186,956
Unamortized debt discount	(18,197)	(20,172)
Carrying amount of convertible debentures	168,759	166,784
Additional paid in capital (net of tax)	$ 31,310	$ 31,310

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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- Definition

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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