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Stock-Based Compensation (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Y	Sep. 30, 2011
Share-based Compensation [Abstract]
Stock-based compensation expense	$ 1,157	$ 384	$ 3,427	$ 837
Capitalized stock-based compensation	463	154	1,371	335
Unrecognized compensation expense	$ 7,801		$ 7,801
Weighted average period, years			1.69

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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