Business Segment Information - Schedule of Net Sales by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Net sales	$ 108,942	$ 104,075	$ 211,680	$ 202,754
Change	4.70%		4.40%
BioStim [Member]
Segment Reporting Information [Line Items]
Net sales	$ 47,174	44,758	$ 91,713	85,802
Change	5.40%		6.90%
Biologics [Member]
Segment Reporting Information [Line Items]
Net sales	$ 15,661	14,256	$ 30,648	28,350
Change	9.90%		8.10%
Extremity Fixation [Member]
Segment Reporting Information [Line Items]
Net sales	$ 24,747	26,817	$ 48,692	51,526
Change	(7.70%)		(5.50%)
Spine Fixation [Member]
Segment Reporting Information [Line Items]
Net sales	$ 21,360	$ 18,244	$ 40,627	$ 37,076
Change	17.10%		9.60%