XML 77 R63.htm IDEA: XBRL DOCUMENT v3.8.0.1
Business Acquisitions and Divestiture - Acquisitions (Details) - USD ($)
$ in Thousands
 1 Months Ended
Aug. 28, 2017
May 02, 2017
Mar. 23, 2016
Feb. 05, 2016
Jan. 12, 2016
Nov. 30, 2015
Sep. 01, 2015
Mar. 31, 2015
Feb. 03, 2016
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Business Acquisition [Line Items]                        
Business acquisition allocated initial goodwill amount                   $ 2,301,331 $ 2,019,740 $ 1,907,593
Southern Anesthesia and Surgical Inc [Member]                        
Business Acquisition [Line Items]                        
Business acquisition, approximate annual sales of acquired entity   $ 72,000                    
Business acquisition allocated initial goodwill amount   $ 76,500                    
Merritt Veterinary Supplies Inc [Member]                        
Business Acquisition [Line Items]                        
Business acquisition, approximate annual sales of acquired entity $ 115,000                      
Business acquisition allocated initial goodwill amount $ 33,400                      
Vetstreet, Inc [Member]                        
Business Acquisition [Line Items]                        
Acquired equity interest (as a percent)         80.10%              
Business acquisition, approximate annual sales of acquired entity         $ 40,000              
Business acquisition allocated initial goodwill amount         $ 17,900              
Rxworks Inc [Member]                        
Business Acquisition [Line Items]                        
Business acquisition, approximate annual sales of acquired entity                 $ 7,000      
Business acquisition allocated initial goodwill amount                 $ 4,200      
Dental Cremer S.A. [Member]                        
Business Acquisition [Line Items]                        
Business acquisition, approximate annual sales of acquired entity       $ 70,000                
Business acquisition allocated initial goodwill amount       $ 37,500                
Series of Individually Immaterial Business Acquisitions [Member]                        
Business Acquisition [Line Items]                        
Business acquisition allocated initial goodwill amount                   $ 43,900 $ 69,900 $ 27,100
J Marita [Member]                        
Business Acquisition [Line Items]                        
Acquired equity interest (as a percent)     50.00%                  
Business acquisition, approximate annual sales of acquired entity     $ 125,000                  
scil animal care company GmbH [Member]                        
Business Acquisition [Line Items]                        
Business acquisition, approximate annual sales of acquired entity               $ 83,000        
Business acquisition allocated initial goodwill amount               $ 3,500        
Jorgen Kruuse A/S [Member]                        
Business Acquisition [Line Items]                        
Acquired equity interest (as a percent)             85.00%          
Business acquisition, approximate annual sales of acquired entity             $ 90,000          
Business acquisition allocated initial goodwill amount             $ 20,700          
Dental Trey (S.R.L.) [Member]                        
Business Acquisition [Line Items]                        
Business acquisition, approximate annual sales of acquired entity           $ 49,000            
Business acquisition allocated initial goodwill amount           $ 8,500