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Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]        
Intangible assets amortization expense $ 1.5 $ 1.5 $ 3.0 $ 3.1