Long-term debt (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure of detailed information about borrowings [line items]

Disclosure of borrowings [Table Text Block]

		Dec. 31, 2021			Dec. 31, 2020
Senior unsecured notes (a)	$	1,185,805		$	1,139,695
Less: Unamortized transaction costs -      revolving credit facilities (b)		(5,531	)		(4,020	)
	$	1,180,274		$	1,135,675

Senior unsecured notes [Member]

Disclosure of detailed information about borrowings [line items]

Disclosure of detailed information about borrowings [Table Text Block]

Balance, January 1, 2020	$	991,558
Addition to Principal, net of $8,176 transaction costs		591,824
Principal repayments		(400,000	)
Change in fair value of embedded derivative (prepayment option)		(47,169	)
Write-down of unamortized transaction costs		2,315
Accretion of transaction costs and premiums		1,167
Balance, December 31, 2020	$	1,139,695
Addition to Principal, net of $8,078 transaction costs		591,922
Principal repayments		(600,000	)
Write-down of fair value of embedded derivative (prepayment option)		49,754
Write-down of unamortized transaction costs		2,480
Accretion of transaction costs and premiums		1,954
Balance, December 31, 2021	$	1,185,805

Unamortized transaction costs - revolving credit facilities [Member]

Disclosure of detailed information about borrowings [line items]

Disclosure of detailed information about unamortized transaction costs revolving credit facilities [Table Text Block]

Balance, January 1, 2020	$	6,303
Accretion of transaction costs		(3,062	)
Write-down of unamortized transaction costs		(1,502	)
Transaction costs		2,281
Balance, December 31, 2020	$	4,020
Accretion of transaction costs		(2,816	)
Transaction costs		4,327
Balance, December 31, 2021 1	$	5,531