Business Segment Information - Schedule of Depreciation and Amortization by SBU Reporting Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Sales Information [Line Items]
Depreciation and amortization	$ 22,878	$ 22,822	$ 18,297
BioStim [Member]
Sales Information [Line Items]
Depreciation and amortization	1,623	1,979	1,659
Biologics [Member]
Sales Information [Line Items]
Depreciation and amortization	1,161	648	567
Extremity Fixation [Member]
Sales Information [Line Items]
Depreciation and amortization	8,442	7,265	5,201
Spine Fixation [Member]
Sales Information [Line Items]
Depreciation and amortization	11,711	12,834	10,800
Operating Segments [Member] | Corporate, Non-Segment [Member]
Sales Information [Line Items]
Depreciation and amortization	$ (59)	$ 96	$ 70