Stock-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Stock-Based Compensation [Abstract]
Shares, Outstanding and Exercisable, End of Period			39,950
Shares, Exercised	(10,000)	(10,000)	(11,450)	(31,000)
Shares, Outstanding and Exercisable, Beginning of year	28,500		28,500		39,950
Weighted Average Exercise Price, Outstanding and Exercisable at Beginning of Year			$ 8.94
Weighted Average Exercise Price, Exercised	$ 6.02	$ 4.87	$ 6.44	$ 3.93
Weighted Average Exercise Price, Outstanding and Exercisable at End of Period	$ 9.94		$ 9.94		$ 8.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			2 years 5 months 1 day	3 years 1 month 6 days	2 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding and Exercisable at End of Period	$ 638		$ 638