Goodwill and Other Identifiable Intangible Assets Cost and Accumulated Amortization (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Patents [Line Items]
Patents, net	$ 288,432	$ 313,529
Patent cost, disposals	3,500	5,500	4,612
Accumulated amortization, disposals	1,753	2,466	3,509
Proceeds from Sale of Intangible Assets	1,000	2,792	11,000
Other costs, related to patent-related sales and disposals	0	0	4,717
Patents [Member]
Patents [Line Items]
Gross carrying amount - patents	400,755	383,379
Accumulated amortization - patents	112,323	69,850
Patents, net	$ 288,432	$ 313,529