Noncontrolling interests (Details) $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Noncontrolling interests
Payments to noncontrolling interests	$ 81,926	$ 66,095
Noncontrolling Interests
Noncontrolling interests
Number of real estate properties subject to ownership from noncontrolling interest	50
Payments to noncontrolling interests	$ 81,900	$ 64,600

Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

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