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Leases (Tables)
 12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Schedule of lease expenses and income
Year ended December 31,
2019

Short-term lease expense
$
36,179

Operating lease expense
4,435

Operating lease income
(3,074
)
Schedule of operating lease income
 
December 31,
2019

Net book value of property, plant and equipment under finance leases
$
139,140

Weighted-average remaining lease term (in years):
 
Finance leases
3.1

Operating leases
8.3

Weighted-average discount rate:
 
Finance leases
3.94
%
Operating leases
4.80
%
Schedule of future minimum lease payments for operating leases
The future minimum lease payments and receipts from non-cancellable operating leases as at December 31, 2019 for the periods shown are as follows:
 
Payments
 
Receipts
For the year ending December 31,
Finance Leases

 
Operating Leases

 
Operating leases

2020
$
31,657

 
$
4,714

 
$
3,052

2021
23,151

 
4,679

 
3,052

2022
16,522

 
3,683

 
2,150

2023
8,064

 
2,199

 
999

2024 and thereafter
1,848

 
11,353

 
—

Total minimum lease payments
$
81,242

 
$
26,628

 
$
9,253

Less: amount representing interest
(4,964
)
 
(5,119
)
 


Carrying amount of minimum lease payments
$
76,278

 
$
21,509

 


Less: current portion of leases
(29,206
)
 
(3,799
)
 


 
$
47,072

 
$
17,710

 
Schedule of future minimum lease payments for finance leases
The future minimum lease payments and receipts from non-cancellable operating leases as at December 31, 2019 for the periods shown are as follows:
 
Payments
 
Receipts
For the year ending December 31,
Finance Leases

 
Operating Leases

 
Operating leases

2020
$
31,657

 
$
4,714

 
$
3,052

2021
23,151

 
4,679

 
3,052

2022
16,522

 
3,683

 
2,150

2023
8,064

 
2,199

 
999

2024 and thereafter
1,848

 
11,353

 
—

Total minimum lease payments
$
81,242

 
$
26,628

 
$
9,253

Less: amount representing interest
(4,964
)
 
(5,119
)
 


Carrying amount of minimum lease payments
$
76,278

 
$
21,509

 


Less: current portion of leases
(29,206
)
 
(3,799
)
 


 
$
47,072

 
$
17,710

 
Schedule of future minimum lease payments for lessor operating leases
The future minimum lease payments and receipts from non-cancellable operating leases as at December 31, 2019 for the periods shown are as follows:
 
Payments
 
Receipts
For the year ending December 31,
Finance Leases

 
Operating Leases

 
Operating leases

2020
$
31,657

 
$
4,714

 
$
3,052

2021
23,151

 
4,679

 
3,052

2022
16,522

 
3,683

 
2,150

2023
8,064

 
2,199

 
999

2024 and thereafter
1,848

 
11,353

 
—

Total minimum lease payments
$
81,242

 
$
26,628

 
$
9,253

Less: amount representing interest
(4,964
)
 
(5,119
)
 


Carrying amount of minimum lease payments
$
76,278

 
$
21,509

 


Less: current portion of leases
(29,206
)
 
(3,799
)
 


 
$
47,072

 
$
17,710