Business Segment Information - Summary of Net Margin, Defined as Gross Profit Less Sales and Marketing Expenses from Continuing Operations by SBU Reporting Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Sales Information [Line Items]
Total net margin	$ 32,070	$ 30,594
General and administrative	17,276	18,241
Research and development	5,933	5,741
Amortization of intangible assets	584	544
Costs related to the accounting review and restatement	8,306
Operating (loss) income	(29)	6,068
Operating Segments [Member] | BioStim [Member]
Sales Information [Line Items]
Total net margin	15,020	17,183
Operating Segments [Member] | Biologics [Member]
Sales Information [Line Items]
Total net margin	6,502	6,018
Operating Segments [Member] | Extremity Fixation [Member]
Sales Information [Line Items]
Total net margin	6,933	5,642
Operating Segments [Member] | Spine Fixation [Member]
Sales Information [Line Items]
Total net margin	4,059	2,176
Corporate, Non-Segment [Member]
Sales Information [Line Items]
Total net margin	444	425
Material Reconciling Items [Member]
Sales Information [Line Items]
General and administrative	17,276	18,241
Research and development	5,933	5,741
Amortization of intangible assets	584	544
Costs related to the accounting review and restatement	8,306
Operating (loss) income	$ (29)	$ 6,068