Employee Benefit Plans (Pension And Other Postretirement Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5,477	$ 6,790	$ 11,401	$ 14,490
Interest cost	4,192	3,876	8,556	7,802
Expected return on plan assets	(5,879)	(6,036)	(11,857)	(11,842)
Amortization of prior service cost (credit)	(53)	57	(107)	(101)
Amortization of other actuarial (gains) losses	532	4,264	1,480	8,815
Net benefit cost	4,269	8,951	9,473	19,164
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	440	538	884	1,094
Interest cost	457	415	921	846
Amortization of prior service cost (credit)	(2,501)	(2,730)	(5,002)	(5,480)
Amortization of other actuarial (gains) losses	(210)	(75)	(380)	2
Net benefit cost	$ (1,814)	$ (1,852)	$ (3,577)	$ (3,538)