Intangible assets (Tables)

12 Months Ended

Dec. 31, 2020

Intangible assets

Schedule of Indefinite-Lived and Definite-Lived Intangible Assets

			Accumulated
As at December 31, 2020	Cost		amortization		Net book value
Trade names and trademarks	$	53,871	$	(1,595)	$	52,276
Customer relationships		196,407		(47,752)		148,655
Software and technology assets		206,829		(108,127)		98,702
Software under development		1,315		—		1,315
	$	458,422	$	(157,474)	$	300,948

			Accumulated
As at December 31, 2019	Cost		amortization		Net book value
Trade names and trademarks	$	53,319	$	(2,028)	$	51,291
Customer relationships		124,865		(34,666)		90,199
Software and technology assets		157,776		(78,330)		79,446
Software under development		12,444		—		12,444
	$	348,404	$	(115,024)	$	233,380

Schedule of Annual Amortization Expense

2021	$	45,996
2022		39,561
2023		27,825
2024		19,087
2025		11,322
	$	143,791