Compensation Programs (Schedule Of Service- And Performance-Based Stock Award Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011
Compensation Programs [Abstract]
Unvested stock awards outstanding at beginning of year, Number of Shares	521,100
Number of Shares, Grants	156,490
Number of Shares, Vestings	(77,164)
Number of Shares, Forfeitures	(3,008)
Unvested stock awards outstanding at end of year, Number of Shares	597,418
Unvested stock awards outstanding at beginning of year, Weighted Average Grant Date Fair Value	$ 11.96
Weighted Average Grant Date Fair Value, Grants	$ 12.80
Weighted Average Grant Date Fair Value, Vestings	$ 10.15
Unvested stock awards outstanding at end of year, Weighted Average Grant Date Fair Value	$ 12.41
Weighted Average Grant Date Fair Value, Forfeitures	$ 12.27