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Goodwill and Other Identifiable Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2013
Patents [Abstract]  
Patent costs and accumulated amortization related to patent sales and disposals [Table Text Block]
For the years ended December 31, 2013, 2012 and 2011, capitalized patent costs and accumulated amortization, and sales proceeds and other costs, related to patent-related sales and disposals are as follows (in thousands):
 
 
2013
 
2012
 
2011
 
 
 
 
 
 
 
Capitalized patent costs
 
$
3,500

 
$
5,500

 
$
4,612

Accumulated amortization
 
1,753

 
2,466

 
3,509

Sales proceeds
 
1,000

 
2,792

 
11,000

Other costs
 
—

 
—

 
4,717
Patents
The gross carrying amounts and accumulated amortization related to acquired intangible assets as of December 31, 2013 and 2012 are as follows (in thousands): 
 
 
2013
 
2012
 
 
 
 
 
Gross carrying amount - patents                                                                             
 
$
400,755

 
$
383,379

Accumulated amortization - patents                                                                             
 
(112,323
)
 
(69,850
)
Patents, net                                                                             
 
$
288,432

 
$
313,529