Basic and Diluted Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table reconciles the numerator and the denominator of the basic and diluted per share computations for earnings attributable to shareholders.

	Net earnings attributable to shareholders		Weighted average shares	Earnings  per share
2018
Basic earnings attributable to shareholders	$	618,199	174,133	$	3.55
Effect of dilutive potential common shares	—		3,700	—
Diluted earnings attributable to shareholders	$	618,199	177,833	$	3.48
2017
Basic earnings attributable to shareholders	$	489,345	179,247	$	2.73
Effect of dilutive potential common shares	—		2,419	—
Diluted earnings attributable to shareholders	$	489,345	181,666	$	2.69
2016
Basic earnings attributable to shareholders	$	430,807	181,282	$	2.38
Effect of dilutive potential common shares	—		1,422	—
Diluted earnings attributable to shareholders	$	430,807	182,704	$	2.36