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Goodwill (Tables) | 3 Months Ended
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Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Goodwill by Reportable Segments [Text Block] | Changes in the carrying value of goodwill by reportable segment were as follows:
| U.S. dialysis |  | Other — Ancillary services |  | Consolidated
Balance at December 31, 2022 | $ | 6,416,825 |  |  | $ | 659,785 |  |  | $ | 7,076,610 |
Acquisitions | — |  |  | 25,723 |  |  | 25,723 |
Impairment charges | — |  |  | (26,083) |  |  | (26,083) |
Foreign currency and other adjustments | — |  |  | 36,310 |  |  | 36,310 |
Balance at December 31, 2023 | $ | 6,416,825 |  |  | $ | 695,735 |  |  | $ | 7,112,560 |
Acquisitions | 102,082 |  |  | 35,208 |  |  | 137,290 |
Divestitures | (1,687) |  |  | — |  |  | (1,687) |
Foreign currency and other adjustments | — |  |  | (18,461) |  |  | (18,461) |
Balance at March 31, 2024 | $ | 6,517,220 |  |  | $ | 712,482 |  |  | $ | 7,229,702 |
Balance at March 31, 2024: |  |  |  |  |
Goodwill | $ | 6,517,220 |  |  | $ | 858,977 |  |  | $ | 7,376,197 |
Accumulated impairment charges | — |  |  | (146,495) |  |  | (146,495) |
| $ | 6,517,220 |  |  | $ | 712,482 |  |  | $ | 7,229,702 |

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