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Share-Based Compensation (Summary Of Share Based Compensation Expense) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Share-based compensation incurred	$ 2,057	$ 1,531	$ 6,105	$ 4,845
Capitalized share-based compensation	(167)	(192)	(525)	(576)
Share-based compensation expense	1,890	1,339	5,580	4,269
Stock Options [Member]
Share-based compensation incurred	210	287	672	849
Restricted Stock [Member]
Share-based compensation incurred	$ 1,847	$ 1,244	$ 5,433	$ 3,996

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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