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Goodwill (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Change in the net carrying amount of goodwill    
Balance at the beginning of the period $ 176,497 $ 185,175
Disposals   (7,031)
Foreign currency (559) (1,647)
Balance at the end of the period 179,373 176,497
Omni Motion Inc.
   
Change in the net carrying amount of goodwill    
Acquisitions 3,435  
Spine
   
Change in the net carrying amount of goodwill    
Balance at the beginning of the period 41,458 41,573
Foreign currency (39) (115)
Balance at the end of the period 41,419 41,458
Orthopedics
   
Change in the net carrying amount of goodwill    
Balance at the beginning of the period 32,140 33,507
Foreign currency (465) (1,367)
Balance at the end of the period 31,675 32,140
Sports Medicine
   
Change in the net carrying amount of goodwill    
Balance at the beginning of the period 102,899 110,095
Disposals   (7,031)
Foreign currency (55) (165)
Balance at the end of the period 106,279 102,899
Sports Medicine | Omni Motion Inc.
   
Change in the net carrying amount of goodwill    
Acquisitions $ 3,435