Share-Based Compensation (Summary Of Outstanding Stock Options) (Details)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Options outstanding, January 1	384,507	253,836
Options granted under 2005 plan	340,000	395,000
Options forfeited under 2005 plan	(3,334)
Options outstanding, June 30,	677,589	476,173
Exercisable June 30,	488,996	312,331
1997 Plan
Options exercised	(15,000)	(48,717)
2005 Plan
Options exercised	(28,584)	(123,946)