Business Segment Information - Summary of Net Sales by Geographic Destination for Each Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 105,593	$ 104,823
Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	82,340	82,318
Global Orthopedics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	23,253	22,505
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	83,346	83,149
U.S. [Member] | Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	77,755	77,106
U.S. [Member] | Global Orthopedics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	5,591	6,043
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	22,247	21,674
International [Member] | Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	4,585	5,212
International [Member] | Global Orthopedics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 17,662	$ 16,462