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Goodwill and Intangible Assets Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Goodwill [Line Items] |  |  |  |  |
Indefinite-lived Intangible Assets (Excluding Goodwill) |  | $ 13,000 | $ 35,266 |  |
Asset Impairment Charges | $ 16,249 |  |  |  |
Goodwill |  | 2,322,928 | 2,433,784 | $ 2,231,303 |
Goodwill, Impairment Loss |  | 0 | 0 | (58,356) | [1]
Finite-Lived Intangible Assets, Amortization Expense |  | 98,747 | 70,195 | 68,607 |
Finite-Lived Intangible Assets, Gross |  | 973,357 | 1,032,907 |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 368,743 | 305,927 |  |
Healthcare Specialty Services [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | (58,356) |
goodwill acquired or allocated member |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Acquired During Period |  | 3,232 | 35,766 |  |
Foreign Currency Gain (Loss) |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | (114,088) | 166,715 |  |
Healthcare Specialty Services [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | 374,910 | 388,025 | 375,879 |
Healthcare Specialty Services [Member] | goodwill acquired or allocated member |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Acquired During Period |  | (907) | 3,501 |  |
Healthcare Specialty Services [Member] | Foreign Currency Gain (Loss) |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | (12,208) | 10,500 |  |
Life Science Member [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | 147,795 | 148,816 | 146,514 |
Life Science Member [Member] | goodwill acquired or allocated member |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Acquired During Period |  | 0 | 0 |  |
Life Science Member [Member] | Foreign Currency Gain (Loss) |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | (1,021) | 2,302 |  |
Applied Sterilization Technologies [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | 1,402,939 | 1,492,269 | 1,331,145 |
Applied Sterilization Technologies [Member] | goodwill acquired or allocated member |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Acquired During Period |  | 5,341 | 15,847 |  |
Applied Sterilization Technologies [Member] | Foreign Currency Gain (Loss) |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | (94,671) | 143,422 |  |
Healthcare Products [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | 397,284 | 404,674 | $ 377,765 |
Healthcare Products [Member] | goodwill acquired or allocated member |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill, Acquired During Period |  | (1,202) | 16,418 |  |
Healthcare Products [Member] | Foreign Currency Gain (Loss) |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  | (6,188) | 10,491 |  |
Trademarks and Trade Names [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Finite-Lived Intangible Assets, Gross |  | 63,570 | 83,509 |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | $ 38,850 | $ 36,864 |  |
[1] | For more information regarding our goodwill impairment loss see Note 3 titled, "Goodwill and Intangible Assets"

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