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Real Estate (Other Dispositions) (Details) $ in Thousands	1 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($) property
Other Dispositions by Property Type
Proceeds			$ 329,971	$ 411,786	$ 314,013
Income from sales of real estate		$ 24,500	236,623	126,004	92,049
Total
Other Dispositions by Property Type
Proceeds			555,500	407,600	216,700
Income from sales of real estate			236,600	126,000	92,000
Operating Properties
Other Dispositions by Property Type
Proceeds			86,100	327,900	41,300
Income from sales of real estate			11,900	$ 81,000	4,500
Aggregate carrying value of property sold			73,100
Number of properties sold | property				10
Operating Properties, Noncontrolling Interest
Other Dispositions by Property Type
Income from sales of real estate				$ 9,800
Net Lease
Other Dispositions by Property Type
Proceeds			469,400	79,700	175,400
Income from sales of real estate			224,700	$ 45,000	$ 87,500
Aggregate carrying value of property sold			220,400
Number of properties sold | property				5	1
Non-recourse debt assumed by buyer	$ 228,000		228,000
Noncontrolling interest at carrying value					$ 3,500
Payments for repurchase of redeemable noncontrolling interest					12,000
Income from sales of real estate | Operating Properties
Other Dispositions by Property Type
Income from sales of real estate			11,900
Income from sales of real estate | Net Lease
Other Dispositions by Property Type
Income from sales of real estate			$ 219,700
Net Lease Asset One | Net Lease
Other Dispositions by Property Type
Income from sales of real estate					$ 62,500

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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
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The cash outflow during the period for redemption of redeemable noncontrolling interests.

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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.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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