Shareholders' Equity Shareholders' Equity (Assumptions Used In The Weighted Average Fair Value Of Stock Options Granted) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected Term	6 years 9 months	7 years 7 months 24 days	7 years 5 months 12 days
Expected Volatility Rate	34.90%	40.43%	36.35%
Expected Dividend Rate	1.46%	1.90%	0.84%
Risk Free Interest Rate	1.03%	1.66%	3.01%