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Earnings per share (Tables) | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Reconciliations of Numerators and Denominators Used to Calculate Basic and Diluted Earnings Per Share | The reconciliations of the numerators and denominators used to calculate basic and diluted earnings per share are as follows:
| Three months ended June 30, |  | Six months ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Basic: |  |  |  |  |  |  |  |  |
Net income attributable to DaVita Inc. | $ | 127,001 |  |  | $ | 53,382 |  |  | $ | 574,698 |  |  | $ | 150,816 |
Weighted average shares outstanding during the period | 193,282 |  |  | 206,692 |  |  | 193,923 |  |  | 206,626 |
Contingently returnable shares held in escrow from the DaVita HealthCare Partners merger | (2,194 | ) |  | (2,194 | ) |  | (2,194 | ) |  | (2,194 | )
Weighted average shares for basic earnings per share calculation | 191,088 |  |  | 204,498 |  |  | 191,729 |  |  | 204,432 |
Basic net income per share attributable to DaVita Inc. | $ | 0.66 |  |  | $ | 0.26 |  |  | $ | 3.00 |  |  | $ | 0.74 |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income attributable to DaVita Inc. | $ | 127,001 |  |  | $ | 53,382 |  |  | $ | 574,698 |  |  | $ | 150,816 |
Weighted average shares outstanding during the period | 193,282 |  |  | 206,692 |  |  | 193,923 |  |  | 206,626 |
Assumed incremental shares from stock plans | 706 |  |  | 1,355 |  |  | 708 |  |  | 1,362 |
Weighted average shares for diluted earnings per share calculation | 193,988 |  |  | 208,047 |  |  | 194,631 |  |  | 207,988 |
Diluted net income per share attributable to DaVita Inc. | $ | 0.65 |  |  | $ | 0.26 |  |  | $ | 2.95 |  |  | $ | 0.73 |
Anti-dilutive potential common shares excluded from calculation(1) | 3,780 |  |  | 1,811 |  |  | 3,603 |  |  | 2,042 |
(1) | Shares associated with stock-settled stock appreciation rights that are excluded from the diluted denominator calculation because they are anti-dilutive under the treasury stock method.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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