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Stock-Based Compensation And Earnings Per Share (Total Stock-Based Compensation) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Stock-Based Compensation And Earnings Per Share
Stock-based compensation expense	$ (87)	$ 2,314	$ 8,383	$ 3,845

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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