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Share Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2007
Share-based compensation arrangement by share-based payment award, number of shares available for grant					5,800,000
Allocated share-based compensation expense	$ 699	$ 323	$ 1,714	$ 843
Stock Options [Member]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross	497,000
Restricted Stock [Member]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period	273,000

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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