Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 248,913	$ 243,525
Operating income (loss)	14,194	1,362
Total other expense - net	(1,500)	(3,354)
Income tax (benefit) expense	1,736	1,162
Net income (loss)	10,958	(3,154)
Cardiovascular
Segment Reporting Information [Line Items]
Net sales	241,006	235,544
Operating income (loss)	12,201	1,502
Endoscopy
Segment Reporting Information [Line Items]
Net sales	7,907	7,981
Operating income (loss)	$ 1,993	$ (140)