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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended 63 Months Ended
Dec. 02, 2020
Nov. 30, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Oct. 01, 2021
Indefinite-lived intangible assets:                  
Impairment of long-lived assets   $ 89,000     $ 0 $ 6,762 [1] $ 142,517 [1]    
Impairment of goodwill $ 21,300 $ 42,400     0 21,269 [1],[2] 42,417 [1],[2] $ 63,700  
Finite-lived intangible assets     $ 107,500            
Useful life     15 years            
Goodwill         $ 899,525 $ 922,318 [3] $ 915,794 $ 922,318 [3]  
Neuromodulation                  
Indefinite-lived intangible assets:                  
Reporting unit, percentage of fair value in excess of carrying amount                 658.00%
Neuromodulation | In-process research and development                  
Indefinite-lived intangible assets:                  
Impairment of long-lived assets       $ 50,300          
Cardiopulmonary                  
Indefinite-lived intangible assets:                  
Goodwill $ 21,300               $ 403,900
Reporting unit, percentage of fair value in excess of carrying amount                 60.00%
Advanced Circulatory Support                  
Indefinite-lived intangible assets:                  
Goodwill                 $ 102,500
Reporting unit, percentage of fair value in excess of carrying amount                 45.00%
[1] 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.”
[2] 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.”
[3] The consolidated balance sheet as of December 31, 2020 has been revised. For further details refer to “Note 1. Nature of Operations.”