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Stock Based Compensation (Details) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Stock Based Compensation [Abstract]
Stock options granted			0		0
Stock options expense	$ 109	$ 97	$ 326	$ 290

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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