Business Segment Information - Summary of Net Margin by SBU Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total net margin	$ 36,098	$ 33,558	$ 62,236	$ 65,628
General and administrative	22,506	18,214	44,075	36,074
Research and development	6,451	6,313	12,296	12,246
Restatements and related costs	2,213	2,327	8,129	10,633
Operating income (loss)	4,928	6,704	(2,264)	6,675
Operating Segments [Member] \| BioStim [Member]
Segment Reporting Information [Line Items]
Total net margin	16,787	17,706	30,800	32,726
Operating Segments [Member] \| Biologics [Member]
Segment Reporting Information [Line Items]
Total net margin	7,285	6,496	13,229	12,997
Operating Segments [Member] \| Extremity Fixation [Member]
Segment Reporting Information [Line Items]
Total net margin	9,149	6,656	16,165	13,590
Operating Segments [Member] \| Spine Fixation [Member]
Segment Reporting Information [Line Items]
Total net margin	3,173	3,130	2,644	7,189
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total net margin	(296)	(430)	(602)	(874)
Material Reconciling Items [Member]
Segment Reporting Information [Line Items]
General and administrative	22,506	18,214	44,075	36,074
Research and development	6,451	6,313	12,296	12,246
Restatements and related costs	$ 2,213	$ 2,327	$ 8,129	$ 10,633

Net margin.

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Restatements and related costs.

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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=26872669&loc=d3e20235-122688

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

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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

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