Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 169,184	$ 174,961	$ 528,151	$ 545,052
Orthopedic Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	89,382	92,750	284,781	301,059
General Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	66,123	69,735	203,295	203,941
Surgical Visualization [Member]
Segment Reporting Information [Line Items]
Net sales	$ 13,679	$ 12,476	$ 40,075	$ 40,052