Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net sales	$ 192,993	$ 189,695	$ 380,007	$ 384,011
Orthopedic Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	101,853	103,836	206,867	210,724
General Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	73,184	71,540	140,032	141,044
Surgical Visualization [Member]
Segment Reporting Information [Line Items]
Net sales	$ 17,956	$ 14,319	$ 33,108	$ 32,243