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Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements of Cash Flows [Abstract]
Income tax payments, net	$ 4,700,000	$ 5,600,000
Interest payment	$ 100,000	$ 0

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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