Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details 3) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income, net		$ (19,000)	$ (11,678)	$ (34,096)	$ (10,573)
Interest expense		7,971	8,348	15,919	16,849
Provision for Income Taxes		23,800	19,600	46,200	20,500
Income Net of Tax		(61,199)	(39,925)	(99,414)	(38,436)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income Net of Tax		(2,465)	(65)	(3,281)	392
Foreign Currency Translation Adjustment [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax		0	(484)	0	(525)
Provision for Income Tax		0	0	0	0
Reclassifications, net of tax		0	(484)	0	(525)
Foreign Currency Translation Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income, net		0	(484)	0	(525)
Unrealized Gain on Available-for-Sale Securities [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax		(4,502)	0	(6,256)	0
Provision for Income Tax		1,801	0	2,502	0
Reclassifications, net of tax		(2,701)	0	(3,754)	0
Unrealized Gain on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Other income, net		(4,502)	0	(6,256)	0
Provision for Income Taxes		1,801	0	2,502	0
Income Net of Tax		(2,701)	0	(3,754)	0
Pension and Other Postretirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax		394	698	788	1,396
Provision for Income Tax		(158)	(279)	(315)	(558)
Reclassifications, net of tax		236	419	473	838
Net Prior Service Cost [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]	105	70	209	139
Provision for Income Tax		(43)	(28)	(84)	(55)
Reclassifications, net of tax		62	42	125	84
Net Actuarial Loss [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]	289	628	579	1,257
Provision for Income Tax		(115)	(251)	(231)	(503)
Reclassifications, net of tax		174	377	348	754
Cash Flow Hedge [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense		0	0	0	132
Provision for Income Taxes		0	0	0	(53)
Income Net of Tax		$ 0	$ 0	$ 0	$ 79

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement plan cost (see Note 9).