Business segment information (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Net Sales by Reporting Segment

The table below presents net sales by reporting segment:

	Year Ended December 31,
	2016					2015					2014
(U.S. Dollars, in thousands)	Net Sales		Percent of Total Net Sales			Net Sales		Percent of Total Net Sales			Net Sales		Percent of Total Net Sales
BioStim	$	176,561		43.1	%	$	164,955		41.6	%	$	154,676		38.5	%
Biologics		57,912		14.1	%		59,832		15.1	%		55,881		13.9	%
Extremity Fixation		102,683		25.1	%		96,034		24.2	%		109,678		27.3	%
Spine Fixation		72,632		17.7	%		75,668		19.1	%		82,042		20.4	%
Net sales	$	409,788		100.0	%	$	396,489		100.0	%	$	402,277		100.0	%

Summary of Net Margin by Reporting Segment

The following table presents net margin by reporting segment:

	Year Ended December 31,
(U.S. Dollars, in thousands)	2016			2015			2014
BioStim	$	75,469		$	67,878		$	66,096
Biologics		26,891			27,226			26,629
Extremity Fixation		30,526			29,493			31,586
Spine Fixation		8,650			8,547			14,243
Corporate		(888	)		(1,260	)		(1,736	)
Net margin	$	140,648		$	131,884		$	136,818
General and administrative		74,404			87,157			79,074
Research and development		28,803			26,389			24,994
Restatements and related costs		2,005			9,083			15,614
Charges related to U.S. Government resolutions		14,369			—			—
Operating income	$	21,067		$	9,255		$	17,136

Schedule of Depreciation and Amortization by Reporting Segment

The following table presents depreciation and amortization by reporting segment:

	Year Ended December 31,
(U.S. Dollars, in thousands)	2016		2015		2014
BioStim	$	2,754	$	2,933	$	1,623
Biologics		1,011		1,157		1,161
Extremity Fixation		5,742		6,636		8,442
Spine Fixation		8,118		10,050		11,711
Corporate		3,216		147		(59	)
Total	$	20,841	$	20,923	$	22,878

Summary of Net Sales by Geographic Destination

The following data includes net sales by geographic destination:

(U.S. Dollars, in thousands)	2016		2015		2014
U.S.	$	316,873	$	305,505	$	294,682
Italy		16,664		15,655		19,573
United Kingdom		10,362		11,376		11,402
Brazil		11,334		13,512		19,633
Others		54,555		50,441		56,987
Net sales	$	409,788	$	396,489	$	402,277

Summary of Property, Plant and Equipment of Reporting Segments by Geographic Area

The following data includes property, plant and equipment by geographic area:

(U.S. Dollars, in thousands)	2016		2015
U.S.	$	38,398	$	42,534
Italy		7,013		6,015
United Kingdom		617		998
Brazil		769		1,036
Others		2,119		1,723
Total	$	48,916	$	52,306