Business and Summary of Significant Accounting Principles (Changes in issued Common Stock) (Details) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Class of Stock [Line Items]
Shares issued upon stock option exercises	(188)
Common Stock - Class A [Member]
Class of Stock [Line Items]
Balance, Beginning	39,296	44,213
Class B shares converted to Class A	0	2
Shares issued upon stock option exercises	188	37
Share awards issued	520	416
Shares retired	(869)	(1,881)
Shares acquired to settle minimum statutory tax withholding requirements	(291)	0
Other shares	(1)	(25)
Balance, Ending	38,843	42,762
Common Stock - Class B [Member]
Class of Stock [Line Items]
Balance, Beginning	3,171	3,178
Class B shares converted to Class A	0	(2)
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	3,171	3,176