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Quarterly report pursuant to Section 13 or 15(d)

Lease Obligations (Narrative) (Details)

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Lease Obligations (Narrative) (Details) (USD $)
In Millions
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Lease Obligations [Abstract] Ìý Ìý Ìý Ìý
Operating lease expense $ 4.2 $ 6.2 $ 17.9 $ 18.1