Business Segments and Geographic Areas (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) Customers	Dec. 31, 2015 USD ($) Customers	Dec. 31, 2014 USD ($) Customers
Segment Reporting Information [Line Items]
Net sales	$ 204,094	$ 184,792	$ 193,433	$ 181,201	$ 191,017	$ 169,184	$ 181,027	$ 177,940	$ 763,520	$ 719,168	$ 740,055
Number of customer representing over 10% of consolidated net sales | Customers									0	0	0
United States [Member]
Segment Reporting Information [Line Items]
Net sales									$ 399,107	$ 361,452	$ 360,960
Americas (excluding the United States) [Member]
Segment Reporting Information [Line Items]
Net sales									87,532	86,867	94,770
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales									147,985	145,565	158,040
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									128,896	125,284	126,285
Orthopedic Surgery [Member]
Segment Reporting Information [Line Items]
Net sales									370,472	388,948	402,750
General Surgery [Member]
Segment Reporting Information [Line Items]
Net sales									341,417	274,190	279,356
Surgical Visualization [Member]
Segment Reporting Information [Line Items]
Net sales									$ 51,631	$ 56,030	$ 57,949