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Stock-Based Compensation (Stock-Based Compensation and Related Tax Benefit) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation [Abstract]
Total stock-based compensation	$ 259	$ 63	$ 485	$ 96
Recognized tax benefit	(91)	(22)	(170)	(34)
Net expense recognized	$ 168	$ 41	$ 315	$ 62

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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