Revenue Recognition and Accounts Receivable - Schedule of Net Sales by Major Product Category by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue Recognition And Accounts Receivable [Line Items]
Net sales	$ 104,823	$ 109,112
Change	(3.90%)
Bone Growth Therapies [Member]
Revenue Recognition And Accounts Receivable [Line Items]
Net sales	$ 45,443	47,283
Change	(3.90%)
Spinal Implants [Member]
Revenue Recognition And Accounts Receivable [Line Items]
Net sales	$ 22,926	22,903
Change	0.10%
Biologics [Member]
Revenue Recognition And Accounts Receivable [Line Items]
Net sales	$ 13,949	15,732
Change	(11.30%)
Global Spine [Member]
Revenue Recognition And Accounts Receivable [Line Items]
Net sales	$ 82,318	85,918
Change	(4.20%)
Global Extremities [Member]
Revenue Recognition And Accounts Receivable [Line Items]
Net sales	$ 22,505	$ 23,194
Change	(3.00%)