Revenues (Disaggregated Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net Sales	$ 212,820	$ 197,154	$ 414,884	$ 383,720
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	210,364	194,950	409,910	379,415
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	2,456	2,204	4,974	4,305
Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	110,131	105,561	218,994	209,350
Orthopedic Surgery | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	108,041	103,528	214,706	205,332
Orthopedic Surgery | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	2,090	2,033	4,288	4,018
General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	102,689	91,593	195,890	174,370
General Surgery | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	102,323	91,422	195,204	174,083
General Surgery | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net Sales	366	171	686	287
UNITED STATES
Disaggregation of Revenue [Line Items]
Net Sales	109,656	100,010	215,907	199,437
UNITED STATES | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	41,057	40,886	84,209	83,276
UNITED STATES | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	68,599	59,124	131,698	116,161
Americas (excluding the United States) [Member]
Disaggregation of Revenue [Line Items]
Net Sales	24,934	22,628	49,384	43,067
Americas (excluding the United States) [Member] | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	16,586	14,491	33,357	28,109
Americas (excluding the United States) [Member] | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	8,348	8,137	16,027	14,958
EMEA [Member]
Disaggregation of Revenue [Line Items]
Net Sales	43,387	40,339	84,673	78,779
EMEA [Member] | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	29,443	27,500	57,745	54,151
EMEA [Member] | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	13,944	12,839	26,928	24,628
Asia Pacific [Member]
Disaggregation of Revenue [Line Items]
Net Sales	34,843	34,177	64,920	62,437
Asia Pacific [Member] | Orthopedic Surgery
Disaggregation of Revenue [Line Items]
Net Sales	23,045	22,684	43,683	43,814
Asia Pacific [Member] | General Surgery
Disaggregation of Revenue [Line Items]
Net Sales	$ 11,798	$ 11,493	$ 21,237	$ 18,623