Revenues - Disaggregation of Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) item segment	Jun. 30, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Number of operating segments | segment			2
Net sales	$ 218,371	$ 255,532	$ 461,896	$ 493,881
United States
Disaggregation of Revenue [Line Items]
Net sales	118,140	144,662	259,196	282,722
International
Disaggregation of Revenue [Line Items]
Net sales	100,231	110,870	$ 202,700	211,159
Cardiovascular
Disaggregation of Revenue [Line Items]
Number of product categories | item			4
Net sales	212,177	246,666	$ 447,721	477,146
Cardiovascular | Peripheral Intervention
Disaggregation of Revenue [Line Items]
Net sales	72,635	88,848	159,710	173,481
Cardiovascular | Cardiac Intervention
Disaggregation of Revenue [Line Items]
Net sales	66,005	79,643	138,596	152,183
Cardiovascular | Custom Procedural Solutions
Disaggregation of Revenue [Line Items]
Net sales	45,319	47,216	92,940	93,077
Cardiovascular | OEM
Disaggregation of Revenue [Line Items]
Net sales	28,218	30,959	56,475	58,405
Cardiovascular | United States
Disaggregation of Revenue [Line Items]
Net sales	112,302	136,113	245,780	266,605
Cardiovascular | United States | Peripheral Intervention
Disaggregation of Revenue [Line Items]
Net sales	42,614	55,975	98,416	111,575
Cardiovascular | United States | Cardiac Intervention
Disaggregation of Revenue [Line Items]
Net sales	22,698	29,145	51,293	56,161
Cardiovascular | United States | Custom Procedural Solutions
Disaggregation of Revenue [Line Items]
Net sales	23,383	25,150	48,797	48,965
Cardiovascular | United States | OEM
Disaggregation of Revenue [Line Items]
Net sales	23,607	25,843	47,274	49,904
Cardiovascular | International
Disaggregation of Revenue [Line Items]
Net sales	99,875	110,553	201,941	210,541
Cardiovascular | International | Peripheral Intervention
Disaggregation of Revenue [Line Items]
Net sales	30,021	32,873	61,294	61,906
Cardiovascular | International | Cardiac Intervention
Disaggregation of Revenue [Line Items]
Net sales	43,307	50,498	87,303	96,022
Cardiovascular | International | Custom Procedural Solutions
Disaggregation of Revenue [Line Items]
Net sales	21,936	22,066	44,143	44,112
Cardiovascular | International | OEM
Disaggregation of Revenue [Line Items]
Net sales	4,611	5,116	9,201	8,501
Endoscopy
Disaggregation of Revenue [Line Items]
Net sales	6,194	8,866	14,175	16,735
Endoscopy | Endoscopy Devices
Disaggregation of Revenue [Line Items]
Net sales	6,194	8,866	14,175	16,735
Endoscopy | United States | Endoscopy Devices
Disaggregation of Revenue [Line Items]
Net sales	5,838	8,549	13,416	16,117
Endoscopy | International | Endoscopy Devices
Disaggregation of Revenue [Line Items]
Net sales	$ 356	$ 317	$ 759	$ 618