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Income Taxes (Income Taxes Paid) (Details) (USD $)	12 Months Ended
Income Taxes (Income Taxes Paid) (Details) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Income taxes paid	$ 14,614,000	$ 21,251,000	$ 17,789,000

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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