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Real Estate - Dispositions (Details) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($) property
Real Estate [Line Items]
Income from sales of real estate		$ 24,500	$ 3,476	$ 5,409	$ 233,406	$ 79,353
Operating Properties
Real Estate [Line Items]
Proceeds					80,200	228,700
Income from sales of real estate					10,200	54,500
Aggregate carrying value of property sold					70,000
Operating Properties, Noncontrolling Interest
Real Estate [Line Items]
Income from sales of real estate						$ 9,800
Number of properties sold | property						1
Net Lease
Real Estate [Line Items]
Proceeds					452,700	$ 38,400
Income from sales of real estate					223,200	24,900
Aggregate carrying value of property sold					220,400
Non-recourse debt assumed by buyer	$ 228,000				228,000
Total
Real Estate [Line Items]
Proceeds					532,900	267,100
Income from sales of real estate					233,400	$ 79,400
Income From Sales Of Real Estate | Net Lease
Real Estate [Line Items]
Income from sales of real estate					$ 219,700

X

- Definition

Aggregate Carrying Value Of Property Sold

+ References

No definition available.

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- Definition

Number Of Real Estate Properties Sold

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- Definition

Sale Of Property, Nonrecourse Debt Assumed By Other Party

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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

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