Stock-Based Compensation (Schedule of Non-Qualified Stock Options Outstanding and Excercisable) (Details) (Non Qualified Options, USD $)			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 $11.45 - $17.85		Mar. 31, 2013 $19.79 - $32.76
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Excercise Price, Lower Range Limit			$ 11.45		$ 19.79
Range of Exercise Price, Upper Range Limit			$ 17.85		$ 32.76
Options Outstanding, Shares			37,200		52,500
Options Outstanding, Shares, Total	89,700	89,700
Remaining Contractual Life(yrs)			6 years 1 month 13 days	[1]	6 years 4 months 10 days	[1]
Options Outstanding, Exercise Price			$ 11.45	[1]	$ 25.90	[1]
Options Exercisable, Shares			9,600		28,500
Options Exercisable, Shares, Total	38,100
Options Exercisable, Exercise Price			$ 11.45	[1]	$ 25.43	[1]

[1] Weighted Averages