Net Income Per Share (Reconciliation Between Basic And Diluted Weighted Average Shares Outstanding) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic weighted average shares outstanding	70,506,000	69,284,000	70,286,000	69,203,000
Diluted weighted average shares outstanding	72,265,000	72,268,000	72,194,000	70,209,000
Stock Options [Member]
Dilutive awards included in diluted EPS	821,000	1,083,000	847,000	365,000
Restricted Shares/Units [Member]
Dilutive awards included in diluted EPS	938,000	1,901,000	1,061,000	641,000