Earnings per share (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of computations of basic and diluted earnings per share

The computations of basic and diluted EPS for the years ended December 31, 2018, 2017 and 2016 were as follows:



	Year Ended December 31,
	2018		2017		2016
Net income for the computation of basic EPS	$	1,015,632	$	1,076,151	$	1,046,630
Weighted average ordinary shares outstanding—basic	145,162,220		161,059,552		185,514,370
Basic EPS	$	7.00	$	6.68	$	5.64



	Year Ended December 31,
	2018		2017		2016
Net income for the computation of diluted EPS	$	1,015,632	$	1,076,151	$	1,046,630
Weighted average ordinary shares outstanding—diluted	148,706,266		167,287,508		189,682,036
Diluted EPS	$	6.83	$	6.43	$	5.52

Schedule of computation of ordinary shares outstanding, excluding unvested restricted stock

The computations of ordinary shares outstanding, excluding shares of unvested restricted stock, as of December 31, 2018, 2017 and 2016 were as follows:



	As of December 31,
	2018		2017		2016
	Number of ordinary shares
Ordinary shares issued	151,847,345		167,847,345		187,847,345
Treasury shares	(9,172,681	)	(14,855,244	)	(11,600,191	)
Ordinary shares outstanding	142,674,664		152,992,101		176,247,154
Shares of unvested restricted stock	(2,429,442	)	(3,007,752	)	(3,426,810	)
Ordinary shares outstanding, excluding shares of unvested restricted stock	140,245,222		149,984,349		172,820,344