Income Taxes (Schedule Of Deferred Tax Liabilities) (Details) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Income Taxes
Deferred tax liability set-up related to the convertible notes (net of finance costs)	$ 23,924
Decrease in valuation allowance allowing an income tax benefit on current year net operating losses	(9,210)
Net deferred tax asset reserved for by a liability for unrecognized tax benefits	(2,700)	(4,200)
Net deferred tax liability on consolidated balance sheet	$ 12,014

The cumulative amount of all deferred tax liabilities, which result from applying the applicable tax rate to net taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax. A taxable temporary difference is a difference between the tax basis and the carrying amount of an asset or liability in the financial statements prepared in accordance with generally accepted accounting principles that will result in taxable amounts in one or more future periods.

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The amount of the deferred tax liability which was not recognized because of the exceptions to comprehensive recognition of deferred taxes.

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- Definition

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.

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