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Debt Carrying Amount of Debt and Equity Components (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Fair value of convertible notes	$ 223,604	$ 223,604
Unamortized discount	0	(5,336)
Net carrying amount of debt component	223,604	218,268
Carrying amount of equity component	$ 31,831	$ 31,831

Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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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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