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Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Schedule of lease expenses and income

Year ended December 31,			2020						2019
Short-term lease expense			$	14,555					$	36,179
Operating lease expense			4,740						4,435
Operating lease income			(8,118)						(3,074)

Schedule of operating lease income

			December 31, 2020						December 31, 2019
Net book value of property, plant and equipment under finance leases			$115,942						$139,140
Weighted-average remaining lease term (in years):
Finance leases			3.0						3.1
Operating leases			8.1						8.3
Weighted-average discount rate:
Finance leases			3.66		%				3.94		%
Operating leases			4.79		%				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, 2020 for the periods shown are as follows:

			Payments												Receipts
For the year ending December 31,			Finance Leases						Operating Leases						Operating leases
2021			$	28,969					$	4,768					$	8,179
2022			22,735						3,702						7,276
2023			13,942						2,413						6,121
2024			6,442						1,193						493
2025 and thereafter			1,358						10,160						—
Total minimum lease payments			$	73,446					$	22,236					$	22,069
Less: amount representing interest			(3,974)						(4,114)
Carrying amount of minimum lease payments			$	69,472					$	18,122
Less: current portion of leases			(26,895)						(4,004)
			$	42,577					$	14,118

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, 2020 for the periods shown are as follows:

			Payments												Receipts
For the year ending December 31,			Finance Leases						Operating Leases						Operating leases
2021			$	28,969					$	4,768					$	8,179
2022			22,735						3,702						7,276
2023			13,942						2,413						6,121
2024			6,442						1,193						493
2025 and thereafter			1,358						10,160						—
Total minimum lease payments			$	73,446					$	22,236					$	22,069
Less: amount representing interest			(3,974)						(4,114)
Carrying amount of minimum lease payments			$	69,472					$	18,122
Less: current portion of leases			(26,895)						(4,004)
			$	42,577					$	14,118

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, 2020 for the periods shown are as follows:

			Payments												Receipts
For the year ending December 31,			Finance Leases						Operating Leases						Operating leases
2021			$	28,969					$	4,768					$	8,179
2022			22,735						3,702						7,276
2023			13,942						2,413						6,121
2024			6,442						1,193						493
2025 and thereafter			1,358						10,160						—
Total minimum lease payments			$	73,446					$	22,236					$	22,069
Less: amount representing interest			(3,974)						(4,114)
Carrying amount of minimum lease payments			$	69,472					$	18,122
Less: current portion of leases			(26,895)						(4,004)
			$	42,577					$	14,118

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Assets And Liabilities, Lessee [Table Text Block]

+ References

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- Definition

Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

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Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Tabular disclosure of maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919396-209981

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