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Revenue Recognition and Accounts Receivable - Schedule of Net Sales by Major Product Category by Reporting Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Revenue Recognition And Accounts Receivable [Line Items]        
Net sales $ 73,135 $ 115,850 $ 177,958 $ 224,962
Change (36.90%)   (20.90%)  
Bone Growth Therapies [Member]        
Revenue Recognition And Accounts Receivable [Line Items]        
Net sales $ 28,379 50,109 $ 73,822 97,392
Change (43.40%)   (24.20%)  
Spinal Implants [Member]        
Revenue Recognition And Accounts Receivable [Line Items]        
Net sales $ 18,594 23,226 $ 41,520 46,129
Change (19.90%)   (10.00%)  
Biologics [Member]        
Revenue Recognition And Accounts Receivable [Line Items]        
Net sales $ 11,125 16,744 $ 25,074 32,476
Change (33.60%)   (22.80%)  
Global Spine [Member]        
Revenue Recognition And Accounts Receivable [Line Items]        
Net sales $ 58,098 90,079 $ 140,416 175,997
Change (35.50%)   (20.20%)  
Global Extremities [Member]        
Revenue Recognition And Accounts Receivable [Line Items]        
Net sales $ 15,037 $ 25,771 $ 37,542 $ 48,965
Change (41.70%)   (23.30%)