Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Property, Plant, and Equipment are Stated at Cost Less Accumulated Depreciation

Depreciation is computed on the straight-line method over the following estimated useful lives of the assets:

 

Buildings

      25 to 40 years   

Building improvements and leasehold improvements

      8 to 40 years   

Processing equipment

      7 to 10 years   

Office equipment, furniture and fixtures

      5 to 7 years   

Computer hardware and software

      3 years   

Surgical instruments

      3 years   
Reconciliation of Common Stock used in Calculation of Basic and Diluted Earnings Per Share

A reconciliation of the number of common shares used in the calculation of basic and diluted EPS is presented below:

 

     Year Ended December 31,  
     2013      2012      2011  

Basic shares

      56,258,624         55,861,957         55,150,886   

Effect of dilutive securities:

         

Stock options

      —           206,838         203,789   
  

 

 

     

 

 

     

 

 

  

Diluted shares

      56,258,624         56,068,795         55,354,675