Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Foreign currency translation adjustments:
Translation adjustments arising during the period, before tax	$ 5,639	$ 5,321	$ (2,061)	$ 4,233
Translation adjustments arising during the period, income tax	0	0	0	0
Translation adjustments arising during the period, after tax	5,639	5,321	(2,061)	4,233
Adjustment for sales of businesses with foreign operations, before tax	0	(1,409)	0	(888)
Adjustment for sales of businesses with foreign operations, income tax	0	0	0	0
Adjustment for sales of businesses with foreign operations, after tax	0	(1,409)	0	(888)
Total foreign currency translation adjustments, before tax	5,639	3,912	(2,061)	3,345
Total foreign currency translation adjustments, income tax	0	0	0	0
Total foreign currency translation adjustments, after tax	5,639	3,912	(2,061)	3,345
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) for the period, before tax	938	(5,966)	81,439	32,939
Unrealized gains (losses) for the period, tax	(375)	2,387	(32,575)	(13,175)
Unrealized gains (losses) for the period, after tax	563	(3,579)	48,864	19,764
Reclassification adjustment for gain on available-for-sale securities included in net income, before tax	0	0	(884)	(772)
Reclassification adjustment for gain on available-for-sale securities included in net income, income tax			353	309
Reclassification adjustment for gain on available-for-sale securities included in net income, after tax			(531)	(463)
Total unrealized gains (losses) on available-for-sale securities, before tax	938	(5,966)	80,555	32,167
Total unrealized gains (losses) on available-for-sale securities, income tax	(375)	2,387	(32,222)	(12,866)
Total unrealized gains (losses) on available-for-sale securities, after tax	563	(3,579)	48,333	19,301
Pension and other postretirement plans:
Amortization of net prior service credit included in net income	(384)	(469)	(1,205)	(1,390)
Amortization of net prior service credit included in net income, income tax	154	187	482	556
Amortization of net prior service credit included in net income, after tax	(230)	(282)	(723)	(834)
Amortization of net actuarial loss included in net income, before tax	2,004	2,592	6,325	6,839
Amortization of net actuarial loss included in net income, income tax	(801)	(1,036)	(2,529)	(2,735)
Amortization of net actuarial loss included in net income, after tax	1,203	1,556	3,796	4,104
Settlement gain included in net income, before tax	0	0	(3,471)	0
Settlement gain included in net income, income tax			1,388	0
Settlement gain included in net income, after tax			(2,083)	0
Total pension and other postretirement plans, before tax	1,620	2,123	1,649	5,449
Total pension and other postretirement plans, income tax	(647)	(849)	(659)	(2,179)
Total pension and other postretirement plans, after tax	973	1,274	990	3,270
Cash flow hedge:
Gain (loss) for the period, before tax	15	217	259	(1,160)
Gain (loss) for the period, income tax	(6)	(87)	(104)	465
Gain (loss) for the period, after tax	9	130	155	(695)
Other Comprehensive Income, before tax	8,212	286	80,402	39,801
Other Comprehensive Income, income tax	(1,028)	1,451	(32,985)	(14,580)
Other Comprehensive Income, after tax	$ 7,184	$ 1,737	$ 47,417	$ 25,221