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Financial risk management (Tables)
 12 Months Ended
Dec. 31, 2019
Financial Instruments [Abstract]  
Schedule of interest rate risk exposure
The Company’s interest rate risk exposure is mainly related to long-term debt obligations.
As at
Dec 31
2019

Dec 31
2018

Fixed interest rate debt:
 
 
Unsecured notes
$
1,535,662

$
1,189,976

Other limited recourse debt facilities
156,500

161,601

 
$
1,692,162

$
1,351,577

Variable interest rate debt:
 
 
Egypt limited recourse debt facilities
$
75,165

$
101,226

Other limited recourse debt facilities
1,526

5,483

 
$
76,691

$
106,709
Expected cash flows of financial liabilities by maturity date
The expected cash flows of financial liabilities from the date of the balance sheet to the contractual maturity date are as follows:
As at December 31, 2019
Carrying
amount

Contractual
cash flows

 
1 year or less

1-3 years

3-5 years

More than
5 years

Trade and other payables1
$
397,173

$
397,173

 
$
397,173

$
—

$
—

$
—

Lease obligations
718,505

1,008,096

 
134,175

212,020

184,051

477,850

Long-term debt2
1,768,853

2,724,777

 
129,901

484,025

467,933

1,642,918

Cash flow hedges3
195,504

244,304

 
17,620

45,432

56,887

124,365

 
$
3,080,035

$
4,374,350

 
$
678,869

$
741,477

$
708,871

$
2,245,133

1 
Excludes tax and accrued interest.
2 
Contractual cash flows include contractual interest payments related to debt obligations and lease obligations. Interest rates on variable rate debt are based on prevailing rates as at December 31, 2019.
3 
Cash flow hedges includes the impact of discounting and credit valuation adjustments