Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
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- Definition

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.

+ References

No definition available.

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- Definition

Number of interest rate derivative instruments held by the entity at the reporting date.

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Derivatives and Hedging Activities - Derivatives Not Designated as Hedging Instruments (Details) - Interest Rate Swap [Member] $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($) derivative	Jun. 30, 2019 USD ($) derivative	Jun. 30, 2018 USD ($)	Jan. 24, 2019 USD ($)	Dec. 31, 2018 USD ($) derivative
Derivative [Line Items]
Notional Amount				$ 900.0
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Number of Instruments \| derivative	0	0			1
Notional Amount					$ 50.7
Amount of (loss) gain recognized in income on cash flow hedges	$ 0.1	$ 0.1	$ 0.4
Rent and Tenant Receivables and Other Assets, Net [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative assets					$ 0.5