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Segment And Significant Customer Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage     10.00%  
Animal Health International, Inc [Member] | Sales Revenue, Net [Member]
       
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 34.00% 40.00% 37.00% 38.00%
MWI Veterinary Supply Company [Member] | Sales Revenue, Net [Member]
       
Revenue, Major Customer [Line Items]        
Concentration Risk, Percentage 23.00% [1] 21.00% [1] 22.00% [1] 22.00% [1]
[1] Assumes the acquisition of IVESCO by MWI Veterinary Supply Company (which closed as of November 1, 2013) had closed as of January 1, 2013.