Quarterly report pursuant to Section 13 or 15(d)

Business and Summary of Significant Accounting Principles (Changes in issued Common Stock) (Details)

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Business and Summary of Significant Accounting Principles (Changes in issued Common Stock) (Details)
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Common Stock - Class A [Member]
   
Common Stock [Roll Forward]    
Balance, Beginning 38,534,000 39,296,000
Class B shares converted to Class A 3,000 2,000
Shares issued upon stock option exercises 54,000 284,000
Share awards issued 664,000 516,000
Shares retired (1,795,000) (980,000)
Shares acquired to settle minimum statutory tax withholding requirements (17,000) (292,000)
Other   (8,000)
Balance, Ending 37,443,000 38,818,000
Common Stock - Class B [Member]
   
Common Stock [Roll Forward]    
Balance, Beginning 3,169,000 3,171,000
Class B shares converted to Class A (3,000) (2,000)
Shares issued upon stock option exercises 0 0
Share awards issued 0 0
Shares retired 0 0
Shares acquired to settle minimum statutory tax withholding requirements 0 0
Other   0
Balance, Ending 3,166,000 3,169,000