Equity And Long-Term Incentive Plans (Schedule of Restricted Share Units) (Details) (USD $)	12 Months Ended	24 Months Ended
	Dec. 31, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Forfeited In Period	(109,043)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Weighted Average Grant Date Fair Value	0.00
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Grants In Period, Weighted Average Grant Date Fair Value	45.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Forfeited In Period, Weighted Average Grant Date Fair Value	45.08	45.08
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Weighted Average Grant Date Fair Value	45.01	45.01
Performance Vesting Options [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Number	0
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Grants In Period	97,915	284,086
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Forfeited In Period	0
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Number	97,915	97,915
Time Vesting Options [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Number	0
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Grants In Period	353,827
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Forfeited In Period	(16,193)
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Nonvested, Number	337,634	337,634