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Changes in Goodwill by Reportable Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Goodwill [Line Items] |  |  |  |  |
Beginning balance |  |  | $ 9,294,479 | $ 9,415,295 | $ 9,415,295
Acquisitions |  |  | 321,012 |  | 97,093
Divestitures |  |  | (4,980) |  | (8,781)
Goodwill impairment charges | $ (176,000) | $ (4,065) | (253,000) | (4,065) | (192,834)
Foreign currency and other adjustments |  |  | 3,446 |  | (16,294)
Ending balance | 9,360,957 |  | 9,360,957 |  | 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 |  | 5,677,753 |  | 5,629,183
HealthCare Partners (HCP) |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance |  |  | 3,398,264 | 3,562,534 | 3,562,534
Acquisitions |  |  | 248,622 |  | 29,910
Divestitures |  |  | (758) |  | (5,411)
Goodwill impairment charges |  |  | (253,000) |  | (188,769)
Ending balance | 3,393,128 |  | 3,393,128 |  | 3,398,264
Other Segments |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance |  |  | 267,032 | $ 242,118 | 242,118
Acquisitions |  |  | 19,598 |  | 45,273
Goodwill impairment charges |  |  |  |  | (4,065)
Foreign currency and other adjustments |  |  | 3,446 |  | (16,294)
Ending balance | $ 290,076 |  | $ 290,076 |  | $ 267,032

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