Business Segment Information - Summary of Net Sales by Geographic Destination for Each Reporting Unit (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 406,562	$ 459,955	$ 453,042
Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	321,735	357,221	346,594
Global Extremities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	84,827	102,734	106,448
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	327,280	361,939	355,353
U.S. [Member] | Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	304,595	335,410	326,994
U.S. [Member] | Global Extremities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	22,685	26,529	28,359
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	79,282	98,016	97,689
International [Member] | Global Spine [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	17,140	21,811	19,600
International [Member] | Global Extremities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 62,142	$ 76,205	$ 78,089