Revenue (Disaggregated Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Net Sales	$ 202,064	$ 186,567
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	199,545	184,466
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	2,519	2,101
Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	108,862	103,789
Orthopedic Surgery | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	106,664	101,804
Orthopedic Surgery | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	2,198	1,985
General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	93,202	82,778
General Surgery | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	92,881	82,662
General Surgery | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	321	116
UNITED STATES
Disaggregation of Revenue [Line Items]
Net Sales	106,251	99,428
UNITED STATES | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	43,152	42,391
UNITED STATES | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	63,099	57,037
Americas (excluding the United States) [Member]
Disaggregation of Revenue [Line Items]
Net Sales	24,450	20,440
Americas (excluding the United States) [Member] | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	16,771	13,618
Americas (excluding the United States) [Member] | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	7,679	6,822
EMEA [Member]
Disaggregation of Revenue [Line Items]
Net Sales	41,286	38,439
EMEA [Member] | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	28,302	26,650
EMEA [Member] | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	12,984	11,789
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net Sales	30,077	28,260
Asia Pacific [Member] | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	20,637	21,130
Asia Pacific [Member] | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	$ 9,440	$ 7,130