Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 280,325		$ 218,371		$ 529,238	$ 461,896
Operating income (loss)	8,895		(18,995)		23,089	(17,633)
Total other expense - net	(2,030)		(3,305)		(3,530)	(6,659)
Income tax (benefit) expense	1,949		(3,242)		3,685	(2,080)
Net income (loss)	4,916	$ 10,958	(19,058)	$ (3,154)	15,874	(22,212)
Cardiovascular
Segment Reporting Information [Line Items]
Net sales	272,292		212,177		513,298	447,721
Operating income (loss)	6,777		(20,462)		18,978	(18,960)
Endoscopy
Segment Reporting Information [Line Items]
Net sales	8,033		6,194		15,940	14,175
Operating income (loss)	$ 2,118		$ 1,467		$ 4,111	$ 1,327