Earnings Per Share Attributable to Stockholders

12 Months Ended

Dec. 31, 2015

Earnings Per Share Attributable to Stockholders [Abstract]

Earnings Per Share Attributable to Stockholders

9.Earnings per share attributable to stockholders

	Net			Per share
Year ended December 31, 2015	earnings		Shares	amount
Basic earnings per share attributable
to stockholders	$	136,214	107,075,845	$	1.27
Effect of dilutive securities:
Stock options		-	356,629		-
Diluted earnings per share attributable
to stockholders	$	136,214	107,432,474	$	1.27

9.  Earnings per share attributable to stockholders(continued)

	Net			Per share
Year ended December 31, 2014	earnings		Shares	amount
Basic earnings per share attributable
to stockholders	$	90,981	107,268,425	$	0.85
Effect of dilutive securities:
Stock options		-	386,403		-
Diluted earnings per share attributable
to stockholders	$	90,981	107,654,828	$	0.85

	Net			Per share
Year ended December 31, 2013	earnings		Shares	amount
Basic earnings per share attributable
to stockholders	$	93,644	106,768,856	$	0.88
Effect of dilutive securities:
Stock options		-	386,317		(0.01)
Diluted earnings per share attributable
to stockholders	$	93,644	107,155,173	$	0.87

For the yearended December 31, 2015, stock options to purchase 253,839common shares were outstanding but were excluded from the calculation of diluted earnings per share as they were anti-dilutive (2014:  962,121;  2013:2,670,347).