Business Segment Information - Schedule of Net Sales by Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 111,708	$ 105,247	$ 331,964	$ 316,927
Change	6.10%		4.70%
Bone Growth Therapies [Member]
Segment Reporting Information [Line Items]
Net sales	$ 48,059	44,427	$ 142,433	136,140
Change	8.20%		4.60%
Spinal Implants [Member]
Segment Reporting Information [Line Items]
Net sales	$ 22,102	20,155	$ 66,689	60,782
Change	9.70%		9.70%
Biologics [Member]
Segment Reporting Information [Line Items]
Net sales	$ 14,636	15,218	$ 43,639	45,866
Change	(3.80%)		(4.90%)
Orthofix Extremities [Member]
Segment Reporting Information [Line Items]
Net sales	$ 26,911	$ 25,447	$ 79,203	$ 74,139
Change	5.80%		6.80%