Computation of Earnings Per Ordinary Share and Ordinary Share Equivalent (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Computation of basic and diluted earnings per share

The following table sets forth the computation of basic and diluted earnings per ordinary share for the years ended December 31, 2014, 2013 and 2012:

(U.S. dollars in thousands, except per share amounts)	2014		2013		2012
Basic earnings per ordinary share and ordinary share equivalents outstanding:
Net income (loss) attributable to ordinary shareholders	$	188,340	$	1,059,916	$	651,128
Weighted average ordinary shares outstanding	267,103		287,801		307,372
Basic earnings per ordinary share and ordinary share equivalents outstanding	$	0.71	$	3.68	$	2.12
Diluted earnings per ordinary share and ordinary share equivalents outstanding:
Weighted average ordinary shares outstanding – basic	267,103		287,801		307,372
Impact of share based compensation and certain conversion features	4,424		4,268		2,910
Weighted average ordinary shares outstanding – diluted	271,527		292,069		310,282
Diluted earnings per ordinary share & ordinary share equivalents outstanding	$	0.69	$	3.63	$	2.10
Dividends per ordinary share	$	0.64	$	0.56	$	0.44