Stock-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Stock-Based Compensation [Abstract]
Shares, Outstanding and Exercisable at January 1, 2012		39,950
Shares, Granted		0
Shares, Canceled		0
Shares, Exercised	(11,000)	(1,450)	(21,000)
Shares, Outstanding and Exercisable at June 30, 2012		38,500		39,950
Weighted Average Exercise Price, Outstanding and Exercisable at January 1, 2012		$ 8.94
Weighted Average Exercise Price, Granted		$ 0.00
Weighted Average Exercise Price, Canceled		$ 0.00
Weighted Average Exercise Price, Exercised	$ 4.10	$ 9.30	$ 3.48
Weighted Average Exercise Price, Outstanding and Exercisable at June 30, 2012		$ 8.92		$ 8.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		2 years 3 months 18 days	3 years	2 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding and Exercisable at June 30, 2012		$ 758