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Exchangeable Senior Notes (Additional Information About Carrying Amount Of Senior Notes) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2010
Exchangeable Senior Notes [Abstract]
Principal amount of liability component	$ 140,000
Unamortized discount	(1,782)
Carrying amount of liability component	138,218
Carrying amount of equity component	$ 13,950

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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- Definition

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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