Benefit Plans (Summary Of Performance Shares Activity) (Details) (Performance Shares [Member], USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested, January 1 (in shares/awards)	139,940	145,277
Granted (in shares/awards)	51,221	49,093
Vested (in shares/awards)	(45,235)	(54,430)
Forfeited (in shares/awards)	(1,502)	0
Nonvested, June 30 (in shares/awards)	144,424	139,940
2011 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Vested (in shares/awards)	(45,235)
Vested percentage of the target	147.50%
Aggregate payout value	$ 3.4
Payout - cash	2.9
Payout - common stock shares issued (in shares)	4,810
2010 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Vested (in shares/awards)		(54,430)
Vested percentage of the target		197.50%
Aggregate payout value		4.8
Payout - cash		$ 4.4
Payout - common stock shares issued (in shares)		4,177