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Equity-Based Compensation (Schedule Of Number Of Awards And Weighted Average Grant Date Fair Value) (Details) (Restricted Stock Units [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Awards	72,165	74,532
Weighted Average Grant Date Fair Value	$ 16.50	$ 14.36

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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