Stock Options and Incentive Plans (Schedule of Stock Option Activity) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock Options and Incentive Plans [Abstract]
Shares under option	639,163	651,143	910,863
Options canceled	400	4,750	258,200
Options exercised	41,450	7,230	1,520
Shares under option at December 31	597,313	639,163	651,143
Options exercisable at December 31	597,313	639,163	651,143