Compensation Programs (Schedule Of Service-Based Stock Awards) (Details) (USD $)	9 Months Ended
	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value Per Share	$ 13.23
Total Original Grants	24,000
Remaining shares vesting in period	77,164
2008 [Member] | Service-Based Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Year of Grant	2008
Grant Date Fair Value Per Share	$ 12.87
Total Original Grants	6,000
2009 [Member] | Service-Based Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Year of Grant	2009
Grant Date Fair Value Per Share	$ 11.39
Total Original Grants	6,000
2010 [Member] | Service-Based Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Year of Grant	2010
Grant Date Fair Value Per Share	$ 11.64
Total Original Grants	12,000
2010 [Member] | Service-Based Stock Award [Member] | Remaining Shares Vesting In: 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	12,000	[1]
2011 [Member] | Service-Based Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Year of Grant	2011
Grant Date Fair Value Per Share	$ 13.23
Total Original Grants	24,000
2011 [Member] | Service-Based Stock Award [Member] | Remaining Shares Vesting In: 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	24,000
Service-Based Stock Award [Member] | 2006 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Year of Grant	2006
Grant Date Fair Value Per Share	$ 8.06
Total Original Grants	218,957
Service-Based Stock Award [Member] | 2006 [Member] | Remaining Shares Vesting In: 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	42,499	[1]
Service-Based Stock Award [Member] | 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Year of Grant	2007
Grant Date Fair Value Per Share	$ 12.93
Total Original Grants	156,000
Service-Based Stock Award [Member] | 2007 [Member] | Remaining Shares Vesting In: 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	22,665	[1]
Service-Based Stock Award [Member] | 2007 [Member] | Remaining Shares Vesting In: 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	22,498
Service-Based Stock Award [Member] | 2007 [Member] | Remaining Shares Vesting In: 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	22,497
Service-Based Stock Award [Member] | 2007 [Member] | Remaining Shares Vesting In: 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares vesting in period	22,497

[1] All service-based stock awards scheduled to vest during 2011 were vested as of September 30, 2011.