Income Taxes (Components Of Deferred Tax And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Accrued expenses	$ 9,271	$ 6,167
Receivables and inventories	9,789	11,506
Deferred income	49,234	39,911
Net operating loss carryforwards	13,195	6,307
Capitalized R&D	54,047	46,386
Tax credit carryforwards	81,302	87,775
Postretirement obligations	45,989	35,786
Intangibles		949
Other items	13,238	7,843
Total current deferred tax assets	276,065	242,630
Valuation allowance	(28,993)	(2,682)
Net deferred tax assets	247,072	239,948
Fixed assets	(1,189)	(43)
Intangibles	(20,904)
Net deferred tax liabilities	(22,093)	(43)
Net deferred tax assets	224,979	239,905
Current deferred income tax assets	84,541	45,725
Long-term deferred income tax assets	141,064	194,597
Current deferred income tax liabilities	(90)	(26)
Long-term deferred income tax liabilities	$ (536)	$ (391)