Business Segment, Product, and Geographic Information (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Revenue from External Customers by Products and Services

Revenue by product line offerings was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Spine Surgery Products	$	147,333	$	128,682	$	284,640	$	251,348
Biologics	32,837		27,855		62,327		55,012
Monitoring Service	10,507		9,161		21,205		18,842
Total Revenue	$	190,677	$	165,698	$	368,172	$	325,202

Schedule of Revenue and Net Property and Equipment by Geographical Areas [Table Text Block]

Revenue and property and equipment, net, by geographic area were as follows (in thousands):

	Revenue								Property and Equipment, Net
	Three Months Ended June 30,				Six Months Ended June 30,				June 30,		December 31,
	2014		2013		2014		2013		2014		2013
United States	$	167,077	$	151,425	$	325,470	$	297,646	$	110,625	$	109,458
International (excludes Puerto Rico)	23,600		14,273		42,702		27,556		24,238		18,606
Total	$	190,677	$	165,698	$	368,172	$	325,202	$	134,863	$	128,064