Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Foreign currency translation adjustments:
Translation adjustments arising during the period, before tax	$ (9,777)	$ 5,639	$ (7,111)	$ (2,061)
Translation adjustments arising during the period, income tax	0	0	0	0
Translation adjustments arising during the period, after tax	(9,777)	5,639	(7,111)	(2,061)
Unrealized gains on available-for-sale securities:
Unrealized gains for the period, before tax	9,734	938	46,139	81,439
Unrealized gains for the period, tax	(3,894)	(375)	(18,456)	(32,575)
Unrealized gains for the period, after tax	5,840	563	27,683	48,864
Reclassification adjustment for realization of (gain) loss on exchange, sale or write-down of available-for-sale securities included in net income, before tax	0	0	(265,274)	(884)
Reclassification adjustment for realization of (gain) loss on exchange, sale or write-down of available-for-sale securities included in net income, income tax			106,110	353
Reclassification adjustment for realization of (gain) loss on exchange, sale or write-down of available-for-sale securities included in net income, after tax			(159,164)	(531)
Total unrealized gains on available-for-sale securities, before tax	9,734	938	(219,135)	80,555
Total unrealized gains on available-for-sale securities, income tax			87,654	(32,222)
Total unrealized gains on available-for-sale securities, after tax			(131,481)	48,333
Pension and other postretirement plans:
Amortization of net prior service credit included in net income	(101)	(384)	(305)	(1,205)
Amortization of net prior service credit included in net income, income tax	41	154	122	482
Amortization of net prior service credit included in net income, after tax	(60)	(230)	(183)	(723)
Amortization of net actuarial (gain) loss included in net income, before tax	(7,425)	2,004	(22,032)	6,325
Amortization of net actuarial (gain) loss included in net income, income tax	2,970	(801)	8,813	(2,529)
Amortization of net actuarial (gain) loss included in net income, after tax	(4,455)	1,203	(13,219)	3,796
Settlement gain included in net income, before tax	0	0	0	(3,471)
Settlement gain included in net income, income tax			0	1,388
Settlement gain included in net income, after tax			0	(2,083)
Total pension and other postretirement plans, before tax	(7,526)	1,620	(22,337)	1,649
Total pension and other postretirement plans, income tax	3,011	(647)	8,935	(659)
Total pension and other postretirement plans, after tax	(4,515)	973	(13,402)	990
Cash flow hedge:
Gain for the period, before tax	230	15	641	259
Gain for the period, income tax	(92)	(6)	(256)	(104)
Gain for the period, after tax	138	9	385	155
Other Comprehensive (Loss) Income, before tax	(7,339)	8,212	(247,942)	80,402
Other Comprehensive (Loss) Income, income tax	(975)	(1,028)	96,333	(32,985)
Other Comprehensive (Loss) Income, after tax	$ (8,314)	$ 7,184	$ (151,609)	$ 47,417