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Parent Company Statements (Narrative) (Details) (Parent Company [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Parent Company [Member]
Income taxes	$ 4.21	$ 5.97	$ 5.22
Undistributed earnings, restricted from transfer as dividends	$ 146.6	$ 143.0

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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