Stock-Based Compensation (Details 1) (USD $)			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 17.54 [Member]	Dec. 31, 2012 16.04 [Member]
Summary of Options outstanding and exercisable
Exercise Price			$ 17.54	$ 16.04
Number of options outstanding and exercisable shares	75,500	107,375	37,500	38,000
Options outstanding Weighted Average Remaining Contractual Term			1 year	2 years