Employee Stock Benefit Plans (Additional Information On Stock Options Outstanding) (Details) (USD $) In Millions, except Per Share data	9 Months Ended
	Sep. 30, 2011
Option Price Less Than Closing Price Of Common Stock At End Of Quarter [Member]
Below $7.18	$ 7.18
Number of Shares	7.5
Weighted Average Exercise Price	$ 5.62
Number of Shares, Total	2.4
Weighted Average Exercise Price, Total	$ 6,070,000
Number of Shares Exercisable and Unexercisable	9.9
Weighted Average Exercise Price Exercisable and Unexercisable	$ 5,730,000
Option Price Above Closing Price Of Common Stock At End Of Quarter [Member]
Above $7.18	$ 7.18
Number of Shares	7.2
Weighted Average Exercise Price	$ 10.08
Number of Shares, Total	1.4
Weighted Average Exercise Price, Total	$ 9,170,000
Number of Shares Exercisable and Unexercisable	8.6
Weighted Average Exercise Price Exercisable and Unexercisable	$ 9,930,000
Total Outstanding [Member]
Number of Shares	14.7
Weighted Average Exercise Price	$ 7.82
Number of Shares, Total	3.8
Weighted Average Exercise Price, Total	$ 7,210,000
Number of Shares Exercisable and Unexercisable	18.5
Weighted Average Exercise Price Exercisable and Unexercisable	$ 7,690,000