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Stock-Based Compensation (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based employee compensation expense
Stock-based compensation expense	$ 374	$ 441
Tax	145	171
Stock-based compensation expense, net of tax	$ 229	$ 270

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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