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Supplemental Cash Flow Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental Cash Flow Information [Abstract]
Payments of interest and commitment fees	$ 32.9	$ 25.1	$ 13.3
Cash paid for income taxes	1.0	2.4	0.2
Incurred liabilities for fixed and intangible asset additions	$ 2.0	$ 2.6	$ 0.5

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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