Business Segment Information - Schedule of Net Sales by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 102,738	$ 98,679
Change	4.10%
BioStim [Member]
Segment Reporting Information [Line Items]
Net sales	$ 44,539	41,044
Change	8.50%
Biologics [Member]
Segment Reporting Information [Line Items]
Net sales	$ 14,987	14,094
Change	6.30%
Extremity Fixation [Member]
Segment Reporting Information [Line Items]
Net sales	$ 23,945	24,709
Change	(3.10%)
Spine Fixation [Member]
Segment Reporting Information [Line Items]
Net sales	$ 19,267	$ 18,832
Change	2.30%