Business and Summary of Significant Accounting Principles (Changes in issued Common Stock) (Details) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Class of Stock [Line Items]
Shares issued upon stock option exercises	(284)
Common Stock - Class A [Member]
Class of Stock [Line Items]
Balance, Beginning	39,296	44,213
Class B shares converted to Class A	2	6
Shares issued upon stock option exercises	284	157
Share awards issued	516	417
Shares retired	(980)	(3,802)
Shares acquired to settle minimum statutory tax withholding requirements	(292)	0
Other shares	(8)	(25)
Balance, Ending	38,818	40,966
Common Stock - Class B [Member]
Class of Stock [Line Items]
Balance, Beginning	3,171	3,178
Class B shares converted to Class A	(2)	(6)
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 shares	0	0
Balance, Ending	3,169	3,172