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Earnings per share
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Earnings per share
Earnings per share
Basic earnings per share is calculated by dividing net income attributable to the Company, adjusted for any change in noncontrolling interest redemption rights in excess of fair value, by the weighted average number of common shares, net of the weighted average shares held in escrow that under certain circumstances may have been returned to the Company.
Diluted earnings per share includes the dilutive effect of outstanding stock-settled stock appreciation rights (SSARs) and unvested stock units (under the treasury stock method) as well as the weighted average shares held in escrow that were outstanding during the period.
The reconciliations of the numerators and denominators used to calculate basic and diluted earnings per share were as follows:
 
Three months ended
September 30,
 
Nine months ended
September 30,
 
2018
 
2017
 
2018
 
2017
Numerators:
 

 
 

 
 
 
 
Net income from continuing operations attributable to DaVita Inc.
$
73,371

 
$
152,870

 
$
463,989

 
$
745,067

Change in noncontrolling interest redemption rights in excess of fair value
98

 
—

 
—

 
—

Net income from continuing operations for earnings per share calculation
73,469

 
152,870

 
463,989

 
745,067

Net loss from discontinued operations attributable to DaVita Inc.
(210,167
)
 
(367,346
)
 
(154,823
)
 
(384,845
)
Net (loss) income attributable to DaVita Inc. for earnings per share calculation
$
(136,698
)
 
$
(214,476
)
 
$
309,166

 
$
360,222

 
 
 
 
 
 
 
 
Basic:
 
 
 
 
 
 
 
Weighted average shares outstanding during the period
166,819

 
191,078

 
173,875

 
192,964

Weighted average contingently returnable shares held in escrow for the
DaVita HealthCare Partners merger
(48
)
 
(2,194
)
 
(1,471
)
 
(2,194
)
Weighted average shares for basic earnings per share calculation
166,771

 
188,884

 
172,404

 
190,770

 
 
 
 
 
 
 
 
Basic net income (loss) attributable to DaVita Inc. from:
 
 
 
 
 
 
 
Continuing operations per share
$
0.44

 
$
0.81

 
$
2.69

 
$
3.91

Discontinued operations per share
(1.26
)
 
(1.95
)
 
(0.90
)
 
(2.02
)
Basic net (loss) income per share attributable to DaVita Inc.
$
(0.82
)
 
$
(1.14
)
 
$
1.79

 
$
1.89

 
 
 
 
 
 
 
 
Diluted:
 
 
 
 
 
 
 
Weighted average shares outstanding during the period
166,819

 
191,078

 
173,875

 
192,964

Assumed incremental shares from stock plans
443

 
330

 
473

 
582

Weighted average shares for diluted earnings per share calculation
167,262

 
191,408

 
174,348

 
193,546

 
 
 
 
 
 
 
 
Diluted net income (loss) attributable to DaVita Inc. from:
 
 
 
 
 
 
 
Continuing operations per share
$
0.44

 
$
0.80

 
$
2.66

 
$
3.85

Discontinued operations per share
(1.26
)
 
(1.92
)
 
(0.89
)
 
(1.99
)
Diluted net (loss) income per share attributable to DaVita Inc.
$
(0.82
)
 
$
(1.12
)
 
$
1.77

 
$
1.86

Anti-dilutive stock-settled awards excluded from calculation(1)
5,281

 
5,201

 
4,987

 
5,239

 
(1)
Shares associated with stock-settled stock appreciation rights excluded from the diluted denominator calculation because they are anti-dilutive under the treasury stock method.