Business Segment Information - Summary of Net Sales by Geographic Destination for Each Reporting Unit (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 111,708	$ 105,247	$ 331,964	$ 316,927
Bone Growth Therapies [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	48,059	44,427	142,433	136,140
Spinal Implants [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	22,102	20,155	66,689	60,782
Biologics [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	14,636	15,218	43,639	45,866
Orthofix Extremities [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	26,911	25,447	79,203	74,139
U.S. [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	86,756	83,518	260,455	253,238
U.S. [Member] | Bone Growth Therapies [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	48,039	44,427	142,378	136,128
U.S. [Member] | Spinal Implants [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	16,829	17,085	53,261	51,170
U.S. [Member] | Biologics [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	14,634	15,202	43,623	45,816
U.S. [Member] | Orthofix Extremities [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	7,254	6,804	21,193	20,124
International [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	24,952	21,729	71,509	63,689
International [Member] | Bone Growth Therapies [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	20		55	12
International [Member] | Spinal Implants [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	5,273	3,070	13,428	9,612
International [Member] | Biologics [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	2	16	16	50
International [Member] | Orthofix Extremities [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 19,657	$ 18,643	$ 58,010	$ 54,015