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SEGMENT AND SIGNIFICANT CUSTOMER INFORMATION (Details)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Animal Health International, Inc [Member]
      
Total product sales 38.00% [1] 35.00% [1] 38.00% [1]
MWI Veterinary Supply Company [Member]
      
Total product sales 22.00% [2] 20.00% [2] 20.00% [2]
[1] Assumes that the June 2011 acquisition of Animal Health International by Lextron had occurred as of the beginning of the periods being reported.
[2] Assumes that the November 2013 acquisition of IVESCO, the October 2011 acquisition of Micro Beef Technologies and the March 2011 acquisition of Nelson Laboratories by MWI had each occurred as of the beginning of the periods being reported.