Business Segment Information - Summary of Non-GAAP Net Margin 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]
Non-GAAP net margin	$ 35,294	$ 35,516	$ 66,919	$ 67,236
General and administrative	20,409	18,545	38,691	35,550
Research and development	6,887	6,796	14,311	14,436
Charges related to U.S. Government resolutions		12,870		12,870
Operating income (loss)	7,998	(2,695)	13,917	4,380
Interest income (expense), net	76	(113)	121	(151)
Other income (expense), net	585	147	(3,763)	1,980
Income (loss) before income taxes	8,659	(2,661)	10,275	6,209
Operating Segments [Member] | BioStim [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	19,469	18,575	36,602	34,983
Operating Segments [Member] | Biologics [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	6,470	6,718	12,641	12,822
Operating Segments [Member] | Extremity Fixation [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	6,766	8,161	13,178	15,336
Operating Segments [Member] | Spine Fixation [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	2,696	2,201	4,703	4,536
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Non-GAAP net margin	(107)	(139)	(205)	(441)
Material Reconciling Items [Member]
Segment Reporting Information [Line Items]
General and administrative	20,409	18,545	38,691	35,550
Research and development	$ 6,887	$ 6,796	$ 14,311	$ 14,436