Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 267,021			$ 243,975			$ 796,259	$ 705,871
Operating income (loss)	15,931			64			39,020	(17,569)
Total other expense - net	(1,754)			(2,248)			(5,284)	(8,907)
Income tax (benefit) expense	2,210			825			5,895	(1,255)
Net income (loss)	11,967	$ 4,916	$ 10,958	(3,009)	$ (19,058)	$ (3,154)	27,841	(25,221)
Cardiovascular
Segment Reporting Information [Line Items]
Net sales	259,704			236,413			773,002	684,134
Operating income (loss)	14,411			(1,702)			33,389	(20,662)
Endoscopy
Segment Reporting Information [Line Items]
Net sales	7,317			7,562			23,257	21,737
Operating income (loss)	$ 1,520			$ 1,766			$ 5,631	$ 3,093