Earnings per share attributable to stockholders (Tables)

9 Months Ended

Sep. 30, 2022

Earnings per share attributable to stockholders

Computation of Basic and Diluted Earnings Per Share

	Three months ended					Nine months ended
	September 30, 2022					September 30, 2022
	Net income		WA	Per		Net income		WA	Per
	attributable to		number	share		attributable to		number	share
	stockholders		of shares	amount		stockholders		of shares	amount
Basic	$	42,909	110,838,237	$	0.39	$	274,368	110,750,021	$	2.48
Effect of dilutive securities:
Share units		—	641,284		—		—	496,273		(0.01)
Stock options		—	730,014		(0.01)		—	611,801		(0.02)
Diluted	$	42,909	112,209,535	$	0.38	$	274,368	111,858,095	$	2.45

	Three months ended					Nine months ended
	September 30, 2021					September 30, 2021
	Net income		WA	Per		Net income		WA	Per
	attributable to		number	share		attributable to		number	share
	stockholders		of shares	amount		stockholders		of shares	amount
Basic	$	32,336	110,410,172	$	0.29	$	121,273	110,233,851	$	1.10
Effect of dilutive securities:
Share units		—	324,218		—		—	408,574		—
Stock options		—	657,006		—		—	690,822		(0.01)
Diluted	$	32,336	111,391,396	$	0.29	$	121,273	111,333,247	$	1.09