Employee Benefit Plans (Amounts Included In Accumulated Other Comprehensive Loss That Have Not Yet Been Recognized In Net Periodic Benefit Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss		$ (670,188)	$ (690,340)
Prior-service cost		(45,295)	(348)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax		(715,483)	(690,688)
Defined Benefit Plan, Amortization of Net Gains (Losses)	18,600
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	1,670
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss		(33,993)	(31,421)
Prior-service cost		(109)	0
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax		(34,102)	(31,421)
Defined Benefit Plan, Amortization of Net Gains (Losses)	1,116
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	5
Postretirement Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss		(1,605)	374
Prior-service cost		1,580	2,786
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax		$ (25)	$ 3,160