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Goodwill and Other Intangible Assets (Details Textual) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]    
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount $ 0.9  
Goodwill and Other Intangible Assets (Textual) [Abstract]    
Amortization expense for intangible assets 9.1 9.5
Future Amortization Expense Year 2013 19.1  
Future Amortization Expense Year 2014 18.7  
Future Amortization Expense Year 2015 18.6  
Future Amortization Expense Year 2016 18.3  
Future Amortization Expense Year 2017 $ 17.9  
Finite-Lived Intangible Assets, Remaining Amortization Period 15 years