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Stock-Based Compensation Plans (Schedule Of Other Data For Stock Option And Stock Award Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-Based Compensation Plans [Abstract]
Total compensation cost of stock-based compensation plans charged against income	$ 11,975	$ 14,237	$ 14,961
Total income tax benefit recognized in income for stock based compensation plans	4,401	5,232	5,499
Total intrinsic value of stock options exercised	15,671	12,925	10,096
Total intrinsic value of stock awards vested during the period	$ 2,786	$ 3,757	$ 8,437
Per-share weighted averaged grant-date fair value of stock awards granted	$ 41.49	$ 64.74	$ 57.13

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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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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