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Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent
Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent
The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2014 and 2013:
 
Three Months Ended
June 30,
 
Six Months Ended June 30,
(U.S. dollars in thousands, except per share amounts)
2014
 
2013
 
2014
 
2013
 
 
 
 
 
 
 
 
Basic earnings per ordinary share & ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders
$
(279,261
)
 
$
272,698

 
$
(23,544
)
 
$
623,488

Weighted average ordinary shares outstanding, in thousands - basic
270,924

 
289,513

 
273,616

 
292,277

Basic earnings per ordinary share & ordinary share equivalents outstanding
$
(1.03
)
 
$
0.94

 
$
(0.09
)
 
$
2.13

 
 
 
 
 
 
 
 
Diluted earnings per ordinary share & ordinary share equivalents outstanding:
Weighted average ordinary shares outstanding, in thousands - basic
270,924

 
289,513

 
273,616

 
292,277

Impact of share-based compensation and certain conversion features, in thousands
—

 
4,820

 
—

 
4,767

Weighted average ordinary shares outstanding, in thousands - diluted
270,924

 
294,333

 
273,616

 
297,044

Diluted earnings per ordinary share & ordinary share equivalents outstanding
$
(1.03
)
 
$
0.93

 
$
(0.09
)
 
$
2.10

Dividends per ordinary share
$
0.16

 
$
0.14

 
$
0.32

 
$
0.28


For the three months ended June 30, 2014 and 2013, and for the six months ended June 30, 2014 and 2013, ordinary shares available for issuance under share-based compensation plans of 16.8 million and 6.0 million, and 16.6 million and 6.3 million, respectively, were not included in the calculation of diluted earnings per share because the assumed exercise or issuance of such shares would be anti-dilutive.