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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Stock-based Compensation [Abstract]
Shares, Outstanding and Exercisable, Beginning of Period			22,500
Shares, Exercised	(3,750)	(10,000)	(3,750)	(11,450)
Shares, Outstanding and Exercisable, End of Period	18,750		18,750		22,500
Weighted Average Exercise Price, Outstanding and Exercisable at Beginning of Year			$ 10.41
Weighted Average Exercise Price, Exercised			$ 9.30	$ 6.44
Weighted Average Exercise Price, Outstanding and Exercisable at End of Period	$ 10.64	$ 6.02	$ 10.64	$ 6.02	$ 10.41
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			1 year 6 months	2 years 4 months 24 days	2 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding and Exercisable at End of Period	$ 658		$ 658