Stock-Based Compensation Plans (Summary Of Stock Options Outstanding) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted	228	140
Restricted stock awards granted, weighted average exercise price	$ 36.47	$ 10.40
2004 Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted	228	140
Restricted stock awards granted, weighted average exercise price	$ 36.47	$ 10.40
2004 Restricted Stock Plan For Non Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards granted	0	0
Restricted stock awards granted, weighted average exercise price