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Revenue Recognition and Accounts Receivable - Schedule of Net Sales Major Product Category by Reporting Segment (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Revenue Recognition And Accounts Receivable [Line Items]    
Net sales $ 109,112 $ 108,709
Change 0.40%  
Bone Growth Therapies [Member]    
Revenue Recognition And Accounts Receivable [Line Items]    
Net sales $ 47,283 46,163
Change 2.40%  
Spinal Implants [Member]    
Revenue Recognition And Accounts Receivable [Line Items]    
Net sales $ 22,903 20,707
Change 10.60%  
Biologics [Member]    
Revenue Recognition And Accounts Receivable [Line Items]    
Net sales $ 15,732 14,335
Change 9.70%  
Global Spine [Member]    
Revenue Recognition And Accounts Receivable [Line Items]    
Net sales $ 85,918 81,205
Change 5.80%  
Global Extremities [Member]    
Revenue Recognition And Accounts Receivable [Line Items]    
Net sales $ 23,194 $ 27,504
Change (15.70%)