Earnings Per Share (Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Earnings per share [abstract]
Net earnings for the year	$ 176,455	$ 111,244
Net earnings	$ 177,882	$ 110,738
Basic earnings per share (shares)	210,085,000	201,397,000
Basic earnings per share (in USD per share)	$ 0.85	$ 0.55
Effect of Dilutive Securities:
Stock Options (shares)	210,000	174,000
Diluted earnings per share (shares)	210,295,000	201,571,000
Diluted earnings per share (in USD per share)	$ 0.85	$ 0.55
Potentially dilutive securities excluded from diluted EPS (shares)	24,902	711,662

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options.

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The total of income less expenses from continuing and discontinued operations, excluding the components of other comprehensive income. [Refer: Other comprehensive income]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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