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Share-Based Compensation (Summarized Information Of Stock Options Outstanding) (Details) (USD $)
9 Months Ended
Sep. 30, 2011
Options Outstanding, Number Outstanding2,972,000
Options Outstanding, Average Remaining Contractual Life6.25
Options Outstanding, Weighted Average Exercise Price$ 10.97
Number Exercisable1,418,000
Options Exercisable, Weighted Average Exercise Price$ 7.63
Range One [Member]
 
Exercise Price Lower Range$ 1.83
Exercise Price Upper Range$ 2.50
Options Outstanding, Number Outstanding199,000
Options Outstanding, Average Remaining Contractual Life1.12
Options Outstanding, Weighted Average Exercise Price$ 2.43
Number Exercisable199,000
Options Exercisable, Weighted Average Exercise Price$ 2.43
Range Two [Member]
 
Exercise Price Lower Range$ 3.68
Exercise Price Upper Range$ 3.68
Options Outstanding, Number Outstanding358,000
Options Outstanding, Average Remaining Contractual Life2.24
Options Outstanding, Weighted Average Exercise Price$ 3.69
Number Exercisable358,000
Options Exercisable, Weighted Average Exercise Price$ 3.69
Range Three [Member]
 
Exercise Price Lower Range$ 6.07
Exercise Price Upper Range$ 6.07
Options Outstanding, Number Outstanding300,000
Options Outstanding, Average Remaining Contractual Life3.24
Options Outstanding, Weighted Average Exercise Price$ 6.07
Number Exercisable300,000
Options Exercisable, Weighted Average Exercise Price$ 6.07
Range Four [Member]
 
Exercise Price Lower Range$ 10.39
Exercise Price Upper Range$ 10.39
Options Outstanding, Number Outstanding516,000
Options Outstanding, Average Remaining Contractual Life7.27
Options Outstanding, Weighted Average Exercise Price$ 10.39
Number Exercisable185,000
Options Exercisable, Weighted Average Exercise Price$ 10.39
Range Five [Member]
 
Exercise Price Lower Range$ 13.93
Exercise Price Upper Range$ 16.11
Options Outstanding, Number Outstanding1,599,000
Options Outstanding, Average Remaining Contractual Life8.02
Options Outstanding, Weighted Average Exercise Price$ 14.77
Number Exercisable376,000
Options Exercisable, Weighted Average Exercise Price$ 14.05