Stock-Based Compensation (Schedule of Qualified Stock Options Outstanding and Excercisable) (Details) (Qualified Stock Options, USD $)			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 $11.45 - $17.85		Jun. 30, 2013 $19.79 - $32.76		Jun. 30, 2013 $42.70 - $42.70
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Price, Lower Range Limit			$ 11.45		$ 19.79		$ 42.70
Range of Exercise Price, Upper Range Limit			$ 17.85		$ 32.76		$ 42.70
Options Outstanding, Shares			66,500		201,550		49,000
Options Outstanding, Shares, Total	317,050	330,730
Remaining Contractual Life(yrs)			5 years 4 months 21 days	[1]	6 years 0 months 7 days	[1]	9 years 10 months 6 days	[1]
Options, Outstanding, Exercise Price			$ 12.03	[1]	$ 26.45	[1]	$ 42.70	[1]
Options Exercisable, Shares			50,300		129,350		0
Options Exercisable, Shares, Total	179,650
Options Exercisable, Exercise Price			$ 12.21	[1]	$ 24.35	[1]	$ 0.00	[1]

[1] Weighted Averages