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Changes in Goodwill by Reportable Segments (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Goodwill [Line Items] |  |  |
Beginning balance | $ 9,294,479 | $ 9,415,295 | $ 9,415,295
Acquisitions | 371,809 |  | 97,093
Divestitures | (35,819) |  | (8,781)
Goodwill impairment charges | (253,000) | (4,065) | (192,834)
Foreign currency and other adjustments | 5,527 |  | (16,294)
Ending balance | 9,382,996 |  | 9,294,479
U.S. Dialysis And Related Lab Services |  |  |
Goodwill [Line Items] |  |  |
Beginning balance | 5,629,183 | 5,610,643 | 5,610,643
Acquisitions | 52,792 |  | 21,910
Divestitures | (4,222) |  | (3,370)
Ending balance | 5,677,753 |  | 5,629,183
DaVita Medical Group (DMG) |  |  |
Goodwill [Line Items] |  |  |
Beginning balance | 3,398,264 | 3,562,534 | 3,562,534
Acquisitions | 248,901 |  | 29,910
Divestitures | (2,223) |  | (5,411)
Goodwill impairment charges | (253,000) |  | (188,769)
Ending balance | 3,391,942 |  | 3,398,264
Other Segments |  |  |
Goodwill [Line Items] |  |  |
Beginning balance | 267,032 | $ 242,118 | 242,118
Acquisitions | 70,116 |  | 45,273
Divestitures | (29,374) |  |
Goodwill impairment charges |  |  | (4,065)
Foreign currency and other adjustments | 5,527 |  | (16,294)
Ending balance | $ 313,301 |  | $ 267,032

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