Business Segment Information - Summary of Net Margin by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net margin	$ 31,625	$ 31,720
General and administrative	18,282	17,005
Research and development	7,424	7,640
Operating income	5,919	7,075
Operating Segments [Member] \| BioStim [Member]
Segment Reporting Information [Line Items]
Net margin	17,133	16,408
Operating Segments [Member] \| Biologics [Member]
Segment Reporting Information [Line Items]
Net margin	6,171	6,104
Operating Segments [Member] \| Extremity Fixation [Member]
Segment Reporting Information [Line Items]
Net margin	6,412	7,175
Operating Segments [Member] \| Spine Fixation [Member]
Segment Reporting Information [Line Items]
Net margin	2,007	2,335
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net margin	(98)	(302)
Material Reconciling Items [Member]
Segment Reporting Information [Line Items]
General and administrative	18,282	17,005
Research and development	$ 7,424	$ 7,640

Net margin.

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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