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Geographic information (Lease revenues by individual countries) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total lease revenue	$ 4,412,003	$ 4,321,006	$ 4,682,266
Geographic concentration risk | Total lease revenue
Segment Reporting Information [Line Items]
Percentage of lease revenue	100.00%	100.00%	100.00%
China
Segment Reporting Information [Line Items]
Total lease revenue	$ 782,297	$ 835,317	$ 874,145
China | Geographic concentration risk | Total lease revenue
Segment Reporting Information [Line Items]
Percentage of lease revenue	17.70%	19.30%	18.70%
United States
Segment Reporting Information [Line Items]
Total lease revenue	$ 579,270	$ 502,976	$ 511,676
United States | Geographic concentration risk | Total lease revenue
Segment Reporting Information [Line Items]
Percentage of lease revenue	13.10%	11.60%	10.90%
Other countries
Segment Reporting Information [Line Items]
Total lease revenue	$ 3,050,436	$ 2,982,713	$ 3,296,445
Other countries | Geographic concentration risk | Total lease revenue
Segment Reporting Information [Line Items]
Percentage of lease revenue	69.20%	69.10%	70.40%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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