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Stock-Based Compensation (Narrative) (Details) (USD $)	9 Months Ended
Stock-Based Compensation (Narrative) (Details) (USD $)	Sep. 30, 2012 ShareBasedCompensationPlan	Sep. 30, 2011 employee
Stock-Based Compensation [Abstract]
Number of stock-based employee compensation plan	1
Number of employees that were granted options to purchase common stock	4
Number of employees that exercised options to purchase common stock		2
Shares granted to each director	2,500
Exercised options, shares		4,500
Recognized compensation expense	$ 6,000

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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- Definition

Number of share options (or share units) exercised during the current period.

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