Goodwill and Intangible Assets (Goodwill Carrying Amounts) (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended						63 Months Ended
	Dec. 02, 2020	Nov. 30, 2019	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, starting balance			$ 922,318	[1]	$ 915,794
Impairment	$ (21,300)	$ (42,400)	0		(21,269)	[2],[3]	$ (42,417)	[2],[3]	$ (63,700)
Foreign currency adjustments			(22,793)		27,793
Goodwill, ending balance			899,525		922,318	[1]	915,794		922,318	[1]
Operating Segments | Cardiopulmonary
Goodwill [Roll Forward]
Goodwill, starting balance			421,038		394,735
Impairment					0
Foreign currency adjustments			(22,793)		26,303
Goodwill, ending balance			398,245		421,038		394,735		421,038
Operating Segments | Neuromodulation
Goodwill [Roll Forward]
Goodwill, starting balance			398,754		398,754
Impairment					0
Foreign currency adjustments			0		0
Goodwill, ending balance			398,754		398,754		398,754		398,754
Operating Segments | Advanced Circulatory Support
Goodwill [Roll Forward]
Goodwill, starting balance			102,526		102,526
Impairment					0
Foreign currency adjustments			0		0
Goodwill, ending balance			102,526		102,526		102,526		102,526
Other
Goodwill [Roll Forward]
Goodwill, starting balance			0		19,779
Impairment					(21,269)
Foreign currency adjustments			0		1,490
Goodwill, ending balance			$ 0		$ 0		$ 19,779		$ 0

[1] The consolidated balance sheet as of December 31, 2020 has been revised. For further details refer to “Note 1. Nature of Operations.”

[2] The consolidated statements of cash flows for the years ended December 31, 2020 and 2019 have been revised. For further details refer to “Note 1. Nature of Operations.”

[3] The consolidated statements of income (loss) for the years ended December 31, 2020 and 2019 have been revised. For further details refer to “Note 1. Nature of Operations.”