Compensation Programs (Schedule Of Dividend Equivalent Rights) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share Based Compensation Arrangement By Dividend Equivalent Rights [Line Items]
Total Grant	0	0	30,000
Related compensation costs	$ 960,000	$ 719,000	$ 752,000
2008 [Member]
Share Based Compensation Arrangement By Dividend Equivalent Rights [Line Items]
Month of Grant	July 2008
Total Grant	225,000
Related compensation costs	396,000	340,000	504,000
2009 [Member]
Share Based Compensation Arrangement By Dividend Equivalent Rights [Line Items]
Month of Grant	July 2009
Total Grant	225,000
Related compensation costs	396,000	340,000	248,000
2010 [Member]
Share Based Compensation Arrangement By Dividend Equivalent Rights [Line Items]
Month of Grant	July 2010
Total Grant	60,000
Related compensation costs	105,000	39,000
2011 [Member]
Share Based Compensation Arrangement By Dividend Equivalent Rights [Line Items]
Month of Grant	August 2011
Total Grant	72,000
Related compensation costs	$ 63,000