26.

Earnings (loss) per share

Basic earnings per share amounts are calculated by dividing the net profit (loss) for the year attributable to ordinary equity holders of the parent by the weighted average number of shares outstanding during the year, increased by the number of non-vested dividend participating share-based payment awards outstanding during the period.

Diluted earnings per share amounts are calculated by dividing the net profit (loss) attributable to ordinary equity holders of the parent by the weighted average number of ordinary shares outstanding during the year plus the weighted average number of ordinary shares that would be issued on conversion of all the dilutive potential ordinary shares into ordinary shares, when the effect of their inclusion is dilutive (decreases earnings per share or increases loss per share).

The computation of the income (loss) and share data used in the basic and diluted earnings per share is as follows:


	2017		2016		2015
Basic earnings (loss) per share -
Net income (loss)	$	369,658	$	325,928	$	(240,634	)
Weighted-average shares outstanding		42,111		42,036		43,716
Non-vested dividend participating awards		308		322		145

		42,419		42,358		43,861

		8.71		7.69		(5.49	)


	2017		2016		2015
Diluted earnings (loss) per share -
Net income (loss)	$	369,658	$	325,928	$	(240,634	)
Weighted-average shares outstanding used for basic earnings per share		42,419		42,358		43,861
Share options on issue		—		5		8

		42,419		42,363		43,869

		8.71		7.69		(5.49	)