Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 181,027	$ 188,150	$ 358,967	$ 370,091
Orthopedic Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	96,801	102,362	195,398	208,310
General Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	71,111	70,745	137,173	134,205
Surgical Visualization [Member]
Segment Reporting Information [Line Items]
Net sales	$ 13,115	$ 15,043	$ 26,396	$ 27,576