Pension and Postretirement Plans (Total Benefit/Cost) (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Cost (Benefit) for the Year	$ 1,927	$ 16,044	$ (4,726)
Early retirement programs and special separation benefit expense	22,700	8,508	634
Total Cost (Benefit) for the Year	(17,599)	(8,608)	(23,219)
Current year actuarial gain (loss)	(762,806)	(82,470)	16,048
Amortization of prior service credit (cost)	1,383	1,859	3,925
Curtailments and settlements	124,051	0	0
Other adjustments	0	745	0
Total Recognized in Other Comprehensive Income (Before Tax Effects)	640,468	89,234	(18,395)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	46,115	40,344	27,619
Interest cost	55,821	59,124	60,033
Plan amendment	(22,700)	(8,508)
Expected return on assets	(105,574)	(96,132)	(95,983)
Amortization of prior service cost (credit)	2,809	3,695
Amortization of prior service cost			3,605
Recognized actuarial loss (gain)	2,756	9,013	0
Net Periodic Cost (Benefit) for the Year	1,927	16,044	(4,726)
Curtailment	(43,930)	0	0
Settlement	39,995	0	0
Early retirement programs and special separation benefit expense	22,700	8,508	634
Total Cost (Benefit) for the Year	20,692	24,552	(4,092)
Current year actuarial gain (loss)	(750,328)	(79,405)	7,046
Amortization of prior service credit (cost)	(2,809)	(3,695)	(1,463)
Recognized actuarial (loss) gain	(2,756)	(9,013)	0
Curtailments and settlements	94,520	0	0
Total Recognized in Other Comprehensive Income (Before Tax Effects)	(661,373)	(92,113)	5,583
Total Recognized in Total (Benefit) Cost and Other Comprehensive Income (Before Tax Effects)	(640,681)	(67,561)	1,491
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,612	1,467	1,655
Interest cost	4,148	4,241	4,342
Plan amendment	0	0	369
Amortization of prior service cost (credit)	55	54	260
Recognized actuarial loss (gain)	2,481	1,833	1,411
Net Periodic Cost (Benefit) for the Year	8,296	7,595	8,037
Settlement	(2,575)	0	0
Total Cost (Benefit) for the Year	5,721	7,595	8,037
Current year actuarial gain (loss)	(9,180)	8,428	9,059
Amortization of prior service credit (cost)	(55)	(54)	(260)
Recognized actuarial (loss) gain	(2,481)	(1,833)	(1,411)
Curtailments and settlements	(2,798)	0	0
Other adjustments	0	745	0
Total Recognized in Other Comprehensive Income (Before Tax Effects)	(14,514)	7,286	7,388
Total Recognized in Total (Benefit) Cost and Other Comprehensive Income (Before Tax Effects)	(8,793)	14,881	15,425
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,488	3,113	2,872
Interest cost	1,848	2,735	3,063
Amortization of prior service cost (credit)	(4,247)	(5,608)	(5,650)
Recognized actuarial loss (gain)	(2,141)	(1,478)	(1,921)
Net Periodic Cost (Benefit) for the Year	(2,052)	(1,238)	(1,636)
Curtailment	(41,623)	438	0
Settlement	(11,927)	0	0
Total Cost (Benefit) for the Year	(55,602)	(800)	(1,636)
Current year actuarial gain (loss)	(3,298)	(11,493)	(55)
Amortization of prior service credit (cost)	4,247	5,608	5,650
Recognized actuarial (loss) gain	2,141	1,478	1,921
Curtailments and settlements	32,329	0	0
Total Recognized in Other Comprehensive Income (Before Tax Effects)	35,419	(4,407)	7,516
Total Recognized in Total (Benefit) Cost and Other Comprehensive Income (Before Tax Effects)	$ (20,183)	$ (5,207)	$ 5,880