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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		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock Option [Member]
Compensation expense for benefit plans	$ 4,835	$ 4,679	$ 9,216	$ 9,124
Income tax benefit from compensation expense for benefit plans	$ 1,862	$ 1,792	$ 3,548	$ 3,495

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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