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Changes in Carrying Value of Goodwill by Reportable Segments (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Line Items] |  |
Beginning balance | $ 9,415,295 | $ 9,212,974
Acquisitions | 97,093 | 221,514
Divestitures | (8,781) | (1,851)
Foreign currency and other adjustments | (16,294) | (17,342)
Goodwill impairment charges | (192,834) |
Ending balance | 9,294,479 | 9,415,295
U.S. dialysis and related lab services |  |
Goodwill [Line Items] |  |
Beginning balance | 5,610,643 | 5,469,473
Acquisitions | 21,910 | 143,021
Divestitures | (3,370) | (1,851)
Ending balance | 5,629,183 | 5,610,643
HealthCare Partners (HCP) |  |
Goodwill [Line Items] |  |
Beginning balance | 3,562,534 | 3,516,162
Acquisitions | 29,910 | 48,649
Divestitures | (5,411) |
Foreign currency and other adjustments |  | (2,277)
Goodwill impairment charges | (188,769) |
Ending balance | 3,398,264 | 3,562,534
Other-Ancillary services and strategic initiatives |  |
Goodwill [Line Items] |  |
Beginning balance | 242,118 | 227,339
Acquisitions | 45,273 | 29,844
Foreign currency and other adjustments | (16,294) | (15,065)
Goodwill impairment charges | (4,065) |
Ending balance | $ 267,032 | $ 242,118

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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