Employee Benefit Plans (Pension And Other Postretirement Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4,910	$ 6,672	$ 16,311	$ 21,162
Interest cost	4,278	3,994	12,834	11,796
Expected return on plan assets	(5,929)	(5,848)	(17,786)	(17,690)
Defined Benefit Plan, Curtailments	1,504	47	1,504	47
Amortization of prior service cost (credit)	(51)	(51)	(158)	(152)
Amortization of other actuarial (gains) losses	741	3,617	2,221	12,430
Net benefit cost	5,453	8,431	14,926	27,593
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	383	497	1,267	1,591
Interest cost	460	427	1,381	1,273
Defined Benefit Plan, Curtailments	0	(5,444)	0	(5,444)
Amortization of prior service cost (credit)	(2,500)	(2,641)	(7,502)	(8,121)
Amortization of other actuarial (gains) losses	(191)	(55)	(571)	(53)
Net benefit cost	$ (1,848)	$ (7,216)	$ (5,425)	$ (10,754)