Business Segment Information - Summary of EBIDTA by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Total EBITDA	$ 12,777	$ (8,989)	$ 14,614	$ 3,394
Depreciation and amortization	(7,559)	(6,942)	(15,002)	(13,269)
Interest expense, net	(550)	(901)	(967)	(1,324)
Income (loss) before income taxes	4,668	(16,832)	(1,355)	(11,199)
Operating Segments [Member] | Global Spine [Member]
Segment Reporting Information [Line Items]
Total EBITDA	19,032	(3,707)	30,927	18,710
Operating Segments [Member] | Global Orthopedics [Member]
Segment Reporting Information [Line Items]
Total EBITDA	1,775	(3,359)	(454)	(5,253)
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total EBITDA	$ (8,030)	$ (1,923)	$ (15,859)	$ (10,063)