Income Taxes (Details) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011
Income Taxes
Incremental domestic tax	$ 0
Unremitted earnings from prior period tax positions	7,000
Investment designated as indefinitely invested	$ 300,700

The tax effect as of the balance sheet date of the amount of the estimated future tax reductions attributable to a difference between the tax basis and the generally accepted accounting principles basis of a company's investment in its wholly-owned subsidiaries which will decrease future taxable income when such basis difference reverses.

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The amount as of the balance sheet date of the estimated future tax effects attributable to undistributed earnings of subsidiaries and other recognized entities in countries outside the country of domicile which will increase future taxable income when such earnings are distributed into the country of domicile.

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