Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 257,922	$ 243,049	$ 255,532	$ 238,349	$ 233,249	$ 221,659	$ 224,810	$ 203,035	$ 994,852	$ 882,753	$ 727,852
United States
Disaggregation of Revenue [Line Items]
Net sales									575,711	496,413	420,703
International
Disaggregation of Revenue [Line Items]
Net sales									419,141	386,340	307,149
Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									960,981	849,477	700,613
Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									543,116	464,224	394,346
Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									417,865	385,253	306,267
Endoscopy
Disaggregation of Revenue [Line Items]
Net sales									33,871	33,276	27,239
Stand-alone devices | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									401,466	361,613	275,456
Stand-alone devices | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									222,263	202,129	148,620
Stand-alone devices | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									179,203	159,484	126,836
Cianna Medical | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									49,536	6,292
Cianna Medical | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									49,324	6,292
Cianna Medical | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									212
Custom kits and procedure trays | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									135,856	134,756	126,089
Custom kits and procedure trays | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									92,038	92,975	92,474
Custom kits and procedure trays | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									43,818	41,781	33,615
Inflation devices | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									90,681	92,419	79,875
Inflation devices | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									32,795	31,717	31,848
Inflation devices | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									57,886	60,702	48,027
Catheters | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									177,876	155,525	127,747
Catheters | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									81,183	68,708	62,284
Catheters | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									96,693	86,817	65,463
Embolization devices | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									52,072	50,038	49,532
Embolization devices | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									21,222	20,433	22,374
Embolization devices | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									30,850	29,605	27,158
CRM/EP | Cardiovascular
Disaggregation of Revenue [Line Items]
Net sales									53,494	48,834	41,914
CRM/EP | Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales									44,291	41,970	36,746
CRM/EP | Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales									9,203	6,864	5,168
Endoscopy devices | Endoscopy
Disaggregation of Revenue [Line Items]
Net sales									33,871	33,276	27,239
Endoscopy devices | Endoscopy | United States
Disaggregation of Revenue [Line Items]
Net sales									32,595	32,189	26,357
Endoscopy devices | Endoscopy | International
Disaggregation of Revenue [Line Items]
Net sales									$ 1,276	$ 1,087	$ 882