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Share-Based Employee Compensation Plans and Other Compensation and Benefit Plans (Stock Option Activity) (Details) (Stock Option [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stock Option [Member]
Compensation expense for benefit plans	$ 4,701	$ 4,598	$ 13,917	$ 13,722
Income tax benefit from compensation expense for benefit plans	$ 1,810	$ 1,761	$ 5,358	$ 5,255

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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