Pension and Postretirement Plans (Total Benefit/Cost) (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Cost (Benefit)			$ (34,433)	$ 8,582
Early retirement program expense			4,490	22,700
Total Cost (Benefit)	(17,919)	(2,601)	(30,107)	(5,274)
Amortization of prior service credit (cost)	(102)	(384)	(204)	(821)
Curtailment loss	0	0	0	(3,471)
Total Recognized in Other Comprehensive Income (Before Tax Effects)	7,527	(1,620)	14,811	(29)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6,976	12,710	14,513	26,075
Interest cost	12,894	14,243	25,976	28,534
Expected return on assets	(30,504)	(25,467)	(60,767)	(51,789)
Amortization of prior service cost (credit)	82	909	164	1,818
Recognized actuarial loss (gain)	(7,281)	1,797	(14,319)	3,944
Net Periodic Cost (Benefit)	(17,833)	4,192	(34,433)	8,582
Early retirement program expense	0	8,442	4,490	22,700
Total Cost (Benefit)	(17,833)	12,634	(29,943)	31,282
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	373	430	746	859
Interest cost	1,086	1,023	2,171	2,046
Amortization of prior service cost (credit)	11	13	23	27
Recognized actuarial loss (gain)	375	711	750	1,422
Net Periodic Cost (Benefit)	1,845	2,177	3,690	4,354
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	375	728	750	1,455
Interest cost	362	507	724	1,017
Amortization of prior service cost (credit)	(195)	(1,306)	(391)	(2,666)
Recognized actuarial loss (gain)	(519)	(504)	(1,038)	(1,045)
Net Periodic Cost (Benefit)	23	(575)	45	(1,239)
Settlement gain	0	0	0	(3,471)
Total Cost (Benefit)	$ 23	$ (575)	$ 45	$ (4,710)