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Intangible Assets and Goodwill (Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortizing intangibles, net $ 2,372 $ 3,218
Goodwill 22,128 22,128
Patents [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortizing intangibles, gross 13,097 13,097
Accumulated amortization (11,557) (10,966)
Amortizing intangibles, net 1,540 2,131
Customer-related intangibles [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Amortizing intangibles, gross 1,194 1,300
Accumulated amortization (362) (213)
Amortizing intangibles, net 832 1,087
Manufacturing [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Goodwill 21,521 21,521
Services [Member]
   
Acquired Finite-Lived Intangible Assets [Line Items]    
Goodwill $ 607 $ 607