9. Earnings per share attributable to stockholders

Basic earnings per share (“EPS”) attributable to stockholders was calculated by dividing the net income attributable to stockholders by the weighted average (“WA”) number of common shares outstanding during the period. Diluted EPS attributable to stockholders was calculated by dividing the net income attributable to stockholders by the WA number of shares of common stock outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include unvested PSUs, RSUs, and outstanding stock options. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities.

9. Earnings per share attributable to stockholders (continued)



	Three months ended					Nine months ended
	September 30, 2018					September 30, 2018
		Net income	WA				Net income	WA
		attributable to	number		Per share		attributable to	number		Per share
		stockholders	of shares		amount		stockholders	of shares		amount
Basic	$	23,138	108,365,427	$	0.21	$	85,993	107,811,391	$	0.80
Effect of dilutive securities:
Share units		-	551,313		-		-	408,006		-
Stock options		-	970,454		-		-	913,981		(0.01)
Diluted	$	23,138	109,887,194	$	0.21	$	85,993	109,133,378	$	0.79



	Three months ended					Nine months ended
	September 30, 2017					September 30, 2017
		Net income	WA				Net income	WA
		attributable to	number		Per share		attributable to	number		Per share
		stockholders	of shares		amount		stockholders	of shares		amount
Basic	$	10,261	107,120,618	$	0.10	$	38,273	106,993,358	$	0.36
Effect of dilutive securities:
Share units		-	214,304		-		(50)	337,570		-
Stock options		-	843,381		(0.01)		-	738,696		(0.01)
Diluted	$	10,261	108,178,303	$	0.09	$	38,223	108,069,624	$	0.35