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Business Segment Information - Summary of Net Sales by Geographic Destination for Each Reporting Unit (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales $ 109,112 $ 108,709
Global Spine [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 85,918 81,205
Global Extremities [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 23,194 27,504
U.S. [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 86,124 84,954
U.S. [Member] | Global Spine [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 79,526 78,038
U.S. [Member] | Global Extremities [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 6,598 6,916
International [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 22,988 23,755
International [Member] | Global Spine [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales 6,392 3,167
International [Member] | Global Extremities [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Net sales $ 16,596 $ 20,588