Business Segment, Product and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Entity Wide Information Revenue From External Customer [Line Items]
Total Revenue	$ 215,104	$ 192,383
Spinal Hardware [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Total Revenue	151,957	131,222
Surgical Support [Member]
Entity Wide Information Revenue From External Customer [Line Items]
Total Revenue	$ 63,147	$ 61,161