Share-Based Compensation (Summarized Information Of Stock Options Outstanding) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Outstanding Number of Shares	3,273,000
Options Outstanding Average Remaining Contractual Life	6.00
Outstanding Weighted Average Exercise Price	$ 10.20
Options Exercisable, Number of Shares	1,715,000
Option Exercisable Weighted Average Exercise Price	$ 6.74
Range One [Member]
Exercise Price Lower Range	$ 1.83
Exercise Price Upper Range	$ 2.50
Outstanding Number of Shares	458,000
Options Outstanding Average Remaining Contractual Life	0.84
Outstanding Weighted Average Exercise Price	$ 2.11
Options Exercisable, Number of Shares	458,000
Option Exercisable Weighted Average Exercise Price	$ 2.11
Range Two [Member]
Exercise Price Lower Range	$ 3.68
Exercise Price Upper Range	$ 3.68
Outstanding Number of Shares	384,000
Options Outstanding Average Remaining Contractual Life	2.49
Outstanding Weighted Average Exercise Price	$ 3.68
Options Exercisable, Number of Shares	384,000
Option Exercisable Weighted Average Exercise Price	$ 3.68
Range Three [Member]
Exercise Price Lower Range	$ 6.07
Exercise Price Upper Range	$ 6.07
Outstanding Number of Shares	300,000
Options Outstanding Average Remaining Contractual Life	3.49
Outstanding Weighted Average Exercise Price	$ 6.07
Options Exercisable, Number of Shares	300,000
Option Exercisable Weighted Average Exercise Price	$ 6.07
Range Four [Member]
Exercise Price Lower Range	$ 10.39
Exercise Price Upper Range	$ 10.39
Outstanding Number of Shares	524,000
Options Outstanding Average Remaining Contractual Life	7.52
Outstanding Weighted Average Exercise Price	$ 10.39
Options Exercisable, Number of Shares	191,000
Option Exercisable Weighted Average Exercise Price	$ 10.39
Range Five [Member]
Exercise Price Lower Range	$ 13.93
Exercise Price Upper Range	$ 16.11
Outstanding Number of Shares	1,607,000
Options Outstanding Average Remaining Contractual Life	8.27
Outstanding Weighted Average Exercise Price	$ 14.77
Options Exercisable, Number of Shares	382,000
Option Exercisable Weighted Average Exercise Price	$ 14.05