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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.”

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