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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings Per Share
Basic and diluted earnings per share from continuing operations are calculated as follows (in thousands, except per share amounts):
 
Year Ended December 31,
 
2017
 
2016
 
2015
Basic earnings per share from continuing operations
 
 
 
 
 
Numerator:
 
 
 
 
 
Net income from continuing operations
$
99,468

 
$
478,638

 
$
327,588

Net income from continuing operations attributable to noncontrolling interests
(44,618
)
 
(37,094
)
 
(25,158
)
Net income from continuing operations attributable to Albemarle Corporation
$
54,850

 
$
441,544

 
$
302,430

Denominator:
 
 
 
 
 
Weighted-average common shares for basic earnings per share
110,914

 
112,379

 
111,182

Basic earnings per share from continuing operations
$
0.49

 
$
3.93

 
$
2.72

Diluted earnings per share from continuing operations
 
 
 
 
 
Numerator:
 
 
 
 
 
Net income from continuing operations
$
99,468

 
$
478,638

 
$
327,588

Net income from continuing operations attributable to noncontrolling interests
(44,618
)
 
(37,094
)
 
(25,158
)
Net income from continuing operations attributable to Albemarle Corporation
$
54,850

 
$
441,544

 
$
302,430

Denominator:
 
 
 
 
 
Weighted-average common shares for basic earnings per share
110,914

 
112,379

 
111,182

Incremental shares under stock compensation plans
1,466

 
860

 
374

Weighted-average common shares for diluted earnings per share
112,380

 
113,239

 
111,556

Diluted earnings per share from continuing operations
$
0.49

 
$
3.90

 
$
2.71