Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Foreign currency translation adjustments:
Translation adjustments arising during the period, before tax	$ (1,059)	$ 5,622	$ (21,375)
Translation adjustments arising during the period, income tax	0	0	5,107
Translation adjustments arising during the period, after tax	(1,059)	5,622	(16,268)
Adjustment for sales of businesses with foreign operations, before tax	0	(888)	0
Adjustment for sales of businesses with foreign operations, income tax		0
Adjustment for sales of businesses with foreign operations, after tax	0	(888)
Total foreign currency translation adjustments, before tax	(1,059)	4,734	(21,375)
Total foreign currency translation adjustments, income tax		0
Total foreign currency translation adjustments, after tax	(1,059)	4,734
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) for the period, before tax	95,629	33,098	(37,708)
Unrealized gains (losses) for the period, income tax	(38,251)	(13,239)	15,084
Unrealized gains (losses) for the period, after tax	57,378	19,859	(22,624)
Reclassification adjustment for write-down on available-for-sale securities, net of gain, included in net income, before tax	9,554	17,226	53,793
Reclassification adjustment for write-down on available-for-sale securities, net of gain, included in net income, income tax	(3,822)	(6,890)	(21,518)
Reclassification adjustment for write-down on available-for-sale securities, net of gain, included in net income, after tax	5,732	10,336	32,275
Total unrealized gains (losses) on available-for-sale securities, before tax	105,183	50,324	16,085
Total unrealized gains (losses) on available-for-sale securities, income tax	(42,073)	(20,129)	(6,434)
Total unrealized gains (losses) on available-for-sale securities, after tax	63,110	30,195	9,651
Pension and other postretirement plans:
Actuarial gain (loss)	762,806	82,470	(16,048)
Actuarial gain (loss), income tax	(305,123)	(32,987)	6,420
Actuarial gain (loss), after tax	457,683	49,483	(9,628)
Amortization of net actuarial (gain) loss included in net income, before tax	3,096	9,368	(510)
Amortization of net actuarial (gain) loss included in net income, income tax	(1,238)	(3,746)	204
Amortization of net actuarial (gain) loss included in net income, after tax	1,858	5,622	(306)
Amortization of net prior service credit included in net income	(1,383)	(1,859)	(3,925)
Amortization of net prior service credit included in net income, income tax	553	744	1,570
Amortization of net prior service credit included in net income, after tax	(830)	(1,115)	(2,355)
Curtailment and settlement gain included in net income, before tax	(124,051)	0	0
Curtailment and settlement gain included in net income, income tax	49,617
Curtailment and settlement gain included in net income, after tax	(74,434)
Other Adjustments, before tax	0	(745)	0
Other adjustments, income tax		299
Other adjustments, net of tax		(446)
Foreign affiliate pension adjustments, before tax	0	0	2,088
Foreign affiliate pension adjustment, income tax			0
Foreign affiliate pension adjustments, net of tax			2,088
Total pension and other postretirement plans, before tax	640,468	89,234	(18,395)
Total pension and other postretirement plans, income tax	(256,191)	(35,690)	8,194
Total pension and other postretirement plans, after tax	384,277	53,544	(10,201)
Cash flow hedge:
Gain (loss) for the period, before tax	520	(1,581)	14
Gain (loss) for the period, income tax	(208)	633	(6)
Gain (loss) for the period, after tax	312	(948)	8
Other Comprehensive Income (Loss), Before Tax	745,112	142,711	(23,671)
Other Comprehensive Income (Loss), Income Tax	(298,472)	(55,186)	6,861
Other Comprehensive Income (Loss), Net of Tax	$ 446,640	$ 87,525	$ (16,810)