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Lease revenue (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Lease Revenue [Abstract]
Term of operating lease agreements	14 years
2019	$ 4,085,052
2020	3,722,474
2021	3,434,494
2022	3,148,553
2023	2,861,153
Thereafter	10,555,593
Contracted minimum future lease receivables	$ 27,807,319

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- Definition

Lease Revenue [Abstract]

+ References

No definition available.

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- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919359-209981

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- Definition

Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
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- Definition

Future rental payments receivable within one year of the balance sheet date under an operating lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 50
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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
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Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

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Future rental payments receivable within the third year from the balance sheet date under an operating lease.

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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

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Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

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