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Financial Instruments And Fair Value Measurements (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Goodwill [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Date of annual goodwill and indefinite lived intangible assets impairment test     April 30 April 30
Franchise Rights [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Date of annual goodwill and indefinite lived intangible assets impairment test     April 30 April 30
Reported Value Measurement [Member] | Continuing Operations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets held for sale $ 65,200,000   $ 65,200,000  
Reported Value Measurement [Member] | Discontinued Operations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets held for sale 22,300,000   22,300,000  
Fair Value, Measurements, Nonrecurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Goodwill impairment 0 $ 0 0 $ 0
Impairment of long-lived assets held for sale     3,600,000 500,000
Fair Value, Measurements, Nonrecurring [Member] | Continuing Operations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment of long-lived assets held and used 0 0 1,700,000 0
Impairment of long-lived assets held for sale 2,700,000 0 2,800,000 300,000
Fair Value, Measurements, Nonrecurring [Member] | Discontinued Operations [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment of long-lived assets held for sale $ 800,000 $ 0 800,000 200,000
Fair Value, Measurements, Nonrecurring [Member] | Franchise Rights [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Franchise rights impairment     $ 0 $ 0