Shareholders' Equity (Schedule Of Common Stock Outstanding Roll Forward) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010
Shareholders' Equity [Abstract]
Total shares issued at beginning of period	40,003,642	40,003,642
Treasury shares issued, balance at beginning of period	1,914,416
Shares repurchased	1,419,163
Shares issued out of treasury	(1,072,068)
Total treasury shares at end of period	2,261,511
Total shares outstanding	37,742,131		38,089,226