Employee Benefit Plans (Components Of Net Periodic Benefit Expense (Income)) (Details) (USD $) In Thousands, unless otherwise specified	2 Months Ended			10 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets							6.53%
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on benefit obligation							$ 70,022	$ 70,168	$ 71,308
Expected return on plan assets							(91,324)	(84,411)	(85,935)
Amortization of actuarial loss (gain)							18,272	19,432	10,532
Amortization of prior-service costs							1,670	14	14
Curtailment loss							1,197	0	0
Net periodic benefit expense (income)							(163)	5,203	(4,081)
Actuarial loss (gain)							(238,037)	(720)	256,571
Prior-service cost							0	44,961	0
Reclassification of actuarial loss to net periodic benefit expense (income)							(18,272)	(19,432)	(10,532)
Reclassification of prior-service credit to net periodic benefit expense (income)							(2,867)	(14)	(14)
Loss (gain) recognized in other comprehensive income or loss							(259,176)	24,795	246,025
Discount rate							4.25%	4.65%	5.55%
Expected long-term rate of return on plan assets							7.10%	7.65%	8.00%
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost on benefit obligation							3,213	3,438	3,787
Expected return on plan assets							0	0	0
Amortization of actuarial loss (gain)							1,118	958	678
Amortization of prior-service costs							5	0	0
Curtailment loss							0	44	0
Net periodic benefit expense (income)							4,336	4,440	4,465
Actuarial loss (gain)							(5,508)	3,574	7,587
Prior-service cost							0	109	0
Reclassification of actuarial loss to net periodic benefit expense (income)							(1,118)	(1,002)	(678)
Reclassification of prior-service credit to net periodic benefit expense (income)							(5)	0	0
Loss (gain) recognized in other comprehensive income or loss							(6,631)	2,681	6,909
Discount rate							4.25%	4.65%	5.55%
Expected long-term rate of return on plan assets							0.00%	0.00%	0.00%
Postretirement Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost							1,459	1,679	1,441
Interest cost on benefit obligation							3,434	4,318	4,492
Amortization of actuarial loss (gain)							(1)	0	0
Amortization of prior-service costs							(1,457)	(1,206)	(1,212)
Net periodic benefit expense (income)							3,435	4,791	4,721
Actuarial loss (gain)							(21,143)	1,979	3,493
Prior-service cost							(19,243)	0	0
Reclassification of actuarial gain to net periodic benefit expense							1	0	0
Reclassification of prior-service credit to net periodic benefit expense							1,457	1,206	1,212
Loss (gain) recognized in other comprehensive income or loss							$ (38,928)	$ 3,185	$ 4,705
Discount rate	4.25%	4.30%	5.00%	3.60%	4.30%	5.00%