Share-Based Compensation (Summary Of Stock Option Activity) (Details)					6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013 2005 Plan [Member]	Jun. 30, 2012 2005 Plan [Member]	Jun. 30, 2013 2012 Plan [Member]	Jun. 30, 2012 2012 Plan [Member]	Jun. 30, 2013 1997 Plan [Member]	Jun. 30, 2012 1997 Plan [Member]
Options outstanding, January 1	516,674	211,675	498,338	509,422
Options granted					0	340,000	360,000	0
Options exercised					(55,001)	(331,818)			0	(19,266)
Options outstanding, March 31,	516,674	211,675	498,338	509,422
Options exercisable, March 31,	323,330		321,663