Net Income Per Share (Reconciliation Of Basic To Diluted Weighted Average Common Shares Outstanding) (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Weighted Average Number of Shares Outstanding Reconciliation [Line Items]
Basic	143,000,000		139,000,000	143,000,000		135,000,000
Convertible senior notes dilution	0		0	0		2,000,000
Diluted	143,000,000	[1]	139,000,000	143,000,000	[1]	137,000,000	[1]
Performance Shares [Member]
Weighted Average Number of Shares Outstanding Reconciliation [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	33,591			11,197
Stock Options [Member]
Weighted Average Number of Shares Outstanding Reconciliation [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount						34,842

[1] (a)The Company excluded 33,591 shares and 11,197 shares attributable to unvested performance units from the diluted income per share calculations for the three and nine months ended September 30, 2014, respectively, because they would have been anti-dilutive to the calculation. Options to purchase 34,842 shares of the Company's common stock were excluded from the diluted income per share calculations for the nine months ended September 30, 2013 because they would have been anti-dilutive to the calculation.