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Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill $ 559,307us-gaap_Goodwill $ 559,307us-gaap_Goodwill