Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Details Textual)

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Goodwill and Other Intangible Assets (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Goodwill and Other Intangible Assets (Textual) [Abstract]        
Amortization of finite-lived intangible assets $ 4.5 $ 4.3 $ 13.3 $ 11.9