Revenues - Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) item segment	Mar. 31, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Number of operating segments | segment	2
Net sales	$ 243,525	$ 238,349
United States
Disaggregation of Revenue [Line Items]
Net sales	141,056	138,060
International
Disaggregation of Revenue [Line Items]
Net sales	$ 102,469	100,289
Cardiovascular
Disaggregation of Revenue [Line Items]
Number of product categories | item	4
Net sales	$ 235,544	230,480
Cardiovascular | Peripheral Intervention
Disaggregation of Revenue [Line Items]
Net sales	87,075	84,633
Cardiovascular | Cardiac Intervention
Disaggregation of Revenue [Line Items]
Net sales	72,591	72,540
Cardiovascular | Custom Procedural Solutions
Disaggregation of Revenue [Line Items]
Net sales	47,621	45,861
Cardiovascular | OEM
Disaggregation of Revenue [Line Items]
Net sales	28,257	27,446
Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales	133,478	130,492
Cardiovascular | United States | Peripheral Intervention
Disaggregation of Revenue [Line Items]
Net sales	55,803	55,600
Cardiovascular | United States | Cardiac Intervention
Disaggregation of Revenue [Line Items]
Net sales	28,595	27,016
Cardiovascular | United States | Custom Procedural Solutions
Disaggregation of Revenue [Line Items]
Net sales	25,414	23,815
Cardiovascular | United States | OEM
Disaggregation of Revenue [Line Items]
Net sales	23,666	24,061
Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales	102,066	99,988
Cardiovascular | International | Peripheral Intervention
Disaggregation of Revenue [Line Items]
Net sales	31,272	29,033
Cardiovascular | International | Cardiac Intervention
Disaggregation of Revenue [Line Items]
Net sales	43,996	45,524
Cardiovascular | International | Custom Procedural Solutions
Disaggregation of Revenue [Line Items]
Net sales	22,207	22,046
Cardiovascular | International | OEM
Disaggregation of Revenue [Line Items]
Net sales	4,591	3,385
Endoscopy
Disaggregation of Revenue [Line Items]
Net sales	7,981	7,869
Endoscopy | Endoscopy Devices
Disaggregation of Revenue [Line Items]
Net sales	7,981	7,869
Endoscopy | United States | Endoscopy Devices
Disaggregation of Revenue [Line Items]
Net sales	7,578	7,568
Endoscopy | International | Endoscopy Devices
Disaggregation of Revenue [Line Items]
Net sales	$ 403	$ 301