Pension, Savings, And Other Employee Benefits (Schedule Of Health Care Cost Trend Rate Assumption Has A Significant Effect On The Amounts Reported) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Pension, Savings, And Other Employee Benefits [Abstract]
Adjusted total service and interest cost components, Effect of a 1% increase in assumed health care cost trend rates	$ 1,050
Adjusted total service and interest cost components, Effect of a 1% decrease in assumed health care cost trend rates	(995)
Adjusted postretirement benefit obligation at end of plan year, Effect of a 1% increase in assumed health care cost trend rates	16,574
Adjusted postretirement benefit obligation at end of plan year, Effect of a 1% decrease in assumed health care cost trend rates	$ (15,374)