Employee Benefit Plans (Weighted-Average Fair Value Of Stock Options) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 years		Dec. 31, 2010 years		Dec. 31, 2009 years
Employee Benefit Plans [Abstract]
Weighted-average fair value at grant date	$ 28.29		$ 19.58		$ 14.24
Expected option life (years)	4.8		5.2		4.6
Expected volatility	46.80%		43.80%		39.20%
Risk-free interest rate at grant date	1.70%		2.70%		1.90%
Dividend yield	0.50%	[1]		[1]		[1]

[1] As discussed in Note 14, in April 2011, our Board of Directors approved the initiation of a quarterly cash dividend policy.