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Business and Product Line Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 27, 2016
Dec. 01, 2016
May 01, 2016
Apr. 26, 2016
Dec. 22, 2015
Aug. 26, 2015
Jun. 01, 2015
Jul. 31, 2016
May 31, 2016
Quat-Chem Ltd.                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business   $ 21,606              
Contingent consideration potential payment   3,778              
Purchase price allocation for accounts receivable   4,684              
Purchase price allocation for inventory   1,243              
Purchase price allocation for land, property and equipment   2,715              
Allocation of purchase price for contingent consideration potential payment   1,105              
Purchase price allocation for intangible assets   5,682              
Purchase price allocation for non-amortizable intangible assets   1,637              
Purchase price allocation for accounts payable   2,197              
Purchase price allocation for deferred tax liability   1,133              
Purchase price allocation for other current liabilities   $ 604              
Quat-Chem Ltd. | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life   5 years              
Quat-Chem Ltd. | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life   15 years              
Rogama Industria e Comercio, Ltda.                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business $ 12,423                
Contingent consideration potential payment 2,069                
Purchase price allocation for accounts receivable 1,863                
Purchase price allocation for inventory 1,026                
Purchase price allocation for land, property and equipment 1,840                
Allocation of purchase price for contingent consideration potential payment 430                
Purchase price allocation for intangible assets 3,252                
Purchase price allocation for current liabilities 177                
Purchase price allocation for non-amortizable intangible assets $ 591                
Rogama Industria e Comercio, Ltda. | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life 5 years                
Rogama Industria e Comercio, Ltda. | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life 15 years                
Sterling Test House                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business             $ 1,118    
Contingent consideration potential payment             102    
Purchase price allocation for accounts receivable             43    
Purchase price allocation for inventory             14    
Purchase price allocation for land, property and equipment             141    
Allocation of purchase price for contingent consideration potential payment             102    
Purchase price allocation for intangible assets             $ 345    
Cash paid for contingent consideration               $ 70  
Sterling Test House | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life             5 years    
Sterling Test House | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life             15 years    
Lab M Holdings                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business           $ 12,436      
Purchase price allocation for accounts receivable           975      
Purchase price allocation for inventory           1,169      
Purchase price allocation for land, property and equipment           3,337      
Purchase price allocation for intangible assets           3,611      
Purchase price allocation for cash           285      
Purchase price allocation for other current assets           309      
Purchase price allocation for current liabilities           948      
Purchase price allocation for deferred tax liability           $ 784      
Lab M Holdings | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life           5 years      
Lab M Holdings | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life           15 years      
Virbac Corporation                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business         $ 3,525        
Contingent consideration potential payment         300        
Purchase price allocation for inventory         317        
Purchase price allocation for land, property and equipment         60        
Purchase price allocation for intangible assets         1,759        
Purchase price allocation for current liabilities         $ 300        
Purchase price allocation for contingent consideration                 $ 300
Virbac Corporation | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life         5 years        
Virbac Corporation | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life         15 years        
Deoxi Biotecnologia Ltd                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business       $ 1,549          
Contingent consideration potential payment       2,552          
Purchase price allocation for accounts receivable       132          
Purchase price allocation for inventory       89          
Purchase price allocation for land, property and equipment       232          
Allocation of purchase price for contingent consideration potential payment       453          
Purchase price allocation for intangible assets       350          
Purchase price allocation for other current assets       9          
Purchase price allocation for current liabilities       $ 266          
Deoxi Biotecnologia Ltd | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life       5 years          
Deoxi Biotecnologia Ltd | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life       10 years          
Tetradyne LLC                  
Business Acquisition [Line Items]                  
Cash consideration for purchase of business     $ 24,086            
Purchase price allocation for accounts receivable     1,629            
Purchase price allocation for inventory     1,964            
Purchase price allocation for land, property and equipment     1,625            
Purchase price allocation for intangible assets     10,590            
Purchase price allocation for other current assets     269            
Purchase price allocation for current liabilities     868            
Purchase price allocation for long-term liabilities     $ 660            
Tetradyne LLC | Minimum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life     5 years            
Tetradyne LLC | Maximum                  
Business Acquisition [Line Items]                  
Finite lived intangible assets, useful life     15 years            
Trademarks | Virbac Corporation                  
Business Acquisition [Line Items]                  
Purchase price allocation for non-amortizable intangible assets         $ 200        
Trademarks | Deoxi Biotecnologia Ltd                  
Business Acquisition [Line Items]                  
Purchase price allocation for non-amortizable intangible assets       $ 193