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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Regulation S-X (SX)
-Number 210
-Article 12
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Credit facility covenant, maximum distribution payout ratio of funds from operations

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Credit facility covenant, percentage of net equity offering proceeds and interest in Operating Partnership in addition to minimum tangible net worth requirement

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Debt extension period

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Leverage Ratio Limit Under Existing Revolving Credit Facility

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Line of credit facility accordion feature.

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Line Of Credit Facility Weighted Average Percentage Outstanding Interest Rate.

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The maximum percentage of debt to gross asset value for the two consecutive fiscal quarters immediately following the acquisition .

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Maximum percentage of unencumbered asset pool capitalized value.

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Maximum percentage of unencumbered asset pool capitalized value for two consecutive quartes immediately following the acquisition.

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Percentage of maximum debt to gross asset value.

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Percentage of operating partnerships gross asset value.

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Unencumbered asset pool debt yield limit

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Percentage of unencumbered asset pool debt yield for the two consecutive fiscal quarters immediately following a material acquisition for which the Operating Partnership has provided written notice to the Agent.

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- Definition

The contingent increase above the maximum borrowing capacity under the credit facility, if any one or more of the existing banks or new banks agree to provide such increased commitment amount.

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No definition available.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Average fixed interest rate related to the group of interest rate derivatives.

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The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Debt (Unsecured Credit Facility Narrative) (Details) - USD ($)		12 Months Ended
	Apr. 05, 2017	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Percentage of operating partnerships gross asset value		15.00%
Debt issuance costs, net		$ 7,867,000	$ 6,983,000
Aggregate principal amount		19,900,000
Term Loan
Debt Instrument [Line Items]
Outstanding debt		700,000,000
Debt issuance costs, net		$ 5,800,000
Term Loan Maturing April 27, 2022
Debt Instrument [Line Items]
Maturity date		Apr. 27, 2023
Revolving Credit Facility
Debt Instrument [Line Items]
Maturity date		Dec. 17, 2021
Credit facility availability		$ 820,000,000
Maximum percentage of unencumbered asset pool capitalized value		60.00%
Maximum percentage of unencumbered asset pool capitalized value for two consecutive quarters		65.00%
Unencumbered asset pool debt yield limit		14.00%
Unencumbered asset pool debt yield limit for two consecutive quarters		12.50%
Leverage ratio		1.70%
Outstanding debt		$ 131,000,000	$ 139,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Letter of credit outstanding		$ 2,100,000
Line of credit facility weighted average interest rate outstanding percentage		2.89%
Unsecured Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 1,520,000
Line of credit facility accordion feature		$ 400,000,000
Minimum \| Term Loan \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.50%
Minimum \| Term Loan \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		0.50%
Minimum \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.55%
Minimum \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		0.55%
Maximum \| Term Loan \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		2.10%
Maximum \| Term Loan \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.10%
Maximum \| Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		2.15%
Maximum \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Debt instrument spread on variable interest rate		1.15%
Unsecured Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 1,520,000,000
Additional contingent borrowing capacity, maximum		1,920,000,000
Minimum tangible net worth		$ 1,209,000,000
Credit facility covenant, percentage ownership requirements in addition to minimum tangible net worth		75.00%
Credit facility covenant, maximum distribution payout ratio of funds from operations		95.00%
Maximum percentage on gross asset value		60.00%
Maximum percentage to gross asset value for the next two quarters		65.00%
Outstanding debt		$ 831,000,000
Unsecured Credit Facility \| Term Loan Maturing December 17,2021
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 350,000,000
Maturity date		Dec. 17, 2022
Unsecured Credit Facility \| Term Loan Maturing April 27, 2022
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 350,000,000
Unsecured Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 820,000,000
Debt extension period		1 year
Interest Rate Swap
Debt Instrument [Line Items]
Notional amount of derivative	$ 400,000,000
Weighted average effective fixed interest rate	3.50%
Interest Rate Swap \| LIBOR
Debt Instrument [Line Items]
Variable rate basis	LIBOR
Spread	1.50%
Interest Rate Swap \| Term Loan
Debt Instrument [Line Items]
Aggregate principal amount	$ 400,000,000
Interest Rate Swap \| Term Loan Maturing December 17,2021
Debt Instrument [Line Items]
Notional amount of derivative	200,000,000
Interest Rate Swap \| Term Loan Maturing April 27, 2022
Debt Instrument [Line Items]
Notional amount of derivative	$ 200,000,000