Incentive Plan (Summary Of Incentive Award Plan's Stock Option) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Incentive Plan [Abstract]
Options outstanding, beginning of period, Shares	123,690
Exercised, Shares	(917)
Options outstanding, end of period, Shares	122,773
Exercisable, end of period, Shares	122,773
Options outstanding, beginning of period, Weighted average exercise price	$ 30.13
Exercised, Weighted average exercise price	$ 41.73
Options outstanding, end of period, Weighted average exercise price	$ 30.04
Exercisable, end of period, Weighted average exercise price	$ 30.04