Debt Instrument, Commitment Fee, Percent

No definition available.

Name:	gnl_DebtInstrumentCommitmentFeePercent
Namespace Prefix:	gnl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option

+ References

No definition available.

+ Details

Name:	gnl_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption
Namespace Prefix:	gnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Additional Borrowing Capacity, Accordion Feature

+ References

No definition available.

+ Details

Name:	gnl_LineOfCreditFacilityAdditionalBorrowingCapacityAccordionFeature
Namespace Prefix:	gnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Commitment Fee Percentage, Threshold, Unused Capacity as a Percentage of Current Capacity

+ References

No definition available.

+ Details

Name:	gnl_LineOfCreditFacilityCommitmentFeePercentageThresholdUnusedCapacityAsPercentageOfCurrentCapacity
Namespace Prefix:	gnl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line Of Credit Facility, Number Of Extensions

+ References

No definition available.

+ Details

Name:	gnl_LineOfCreditFacilityNumberOfExtensions
Namespace Prefix:	gnl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

Name:	gnl_LineofCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix:	gnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Extension Term

+ References

No definition available.

+ Details

Name:	gnl_LineofCreditFacilityExtensionTerm
Namespace Prefix:	gnl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Unused Capacity, Facility Fee Multiplier

+ References

No definition available.

+ Details

Name:	gnl_LineofCreditFacilityUnusedCapacityFacilityFeeMultiplier
Namespace Prefix:	gnl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Real Estate and Accumulated Depreciation, Unencumbered Assets

+ References

No definition available.

+ Details

Name:	gnl_RealEstateandAccumulatedDepreciationUnencumberedAssets
Namespace Prefix:	gnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Repayments Of Long-Term Debt, From Proceeds Of Long-Term Lines Of Credit

+ References

No definition available.

+ Details

Name:	gnl_RepaymentsOfLongTermDebtFromProceedsOfLongTermLinesOfCredit
Namespace Prefix:	gnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

+ Details

Name:	us-gaap_DebtInstrumentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

+ Details

Name:	us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_BridgeCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_BridgeLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_MezzanineLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=gnl_KeyBankNationalAssociationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_SeniorUnsecuredMultiCurrencyRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=gnl_JPMorganChaseBankN.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_CreditFacilityEuroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_CreditFacilityPoundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_CreditFacilityDollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnl_MutuallyExclusiveOptionAxis=gnl_LineofCreditFacilityBaseRateOptionThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnl_MutuallyExclusiveOptionAxis=gnl_AboveThresholdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnl_MutuallyExclusiveOptionAxis=gnl_BelowThresholdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnl_MutuallyExclusiveOptionAxis=gnl_LineOfCreditFacilityBaseRateOptionTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnl_MutuallyExclusiveOptionAxis=gnl_LineOfCreditFacilityInterestRateOptionTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnl_MutuallyExclusiveOptionAxis=gnl_LineOfCreditFacilityInterestRateOptionOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_NewCreditFacilityEuroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=gnl_NewCreditFacilityPoundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=gnl_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_SwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Credit Borrowings - Narrative (Details)	Jul. 24, 2017 USD ($) extension	Jul. 24, 2017 EUR (€) extension	Jul. 24, 2017 GBP (£) extension	Mar. 30, 2017 USD ($)	Mar. 30, 2017 EUR (€)	Aug. 08, 2016 USD ($)	Jul. 25, 2013 USD ($)	Jul. 24, 2017 EUR (€)	Jul. 24, 2017 GBP (£)	Jun. 30, 2017 USD ($)	Jun. 30, 2017 EUR (€)	Jun. 30, 2017 GBP (£)	Apr. 01, 2017 EUR (€)	Apr. 01, 2017 GBP (£)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2016 GBP (£)	Dec. 22, 2016 USD ($)	Dec. 22, 2016 EUR (€)	Jul. 25, 2016 USD ($)	Aug. 24, 2015 USD ($)	Feb. 04, 2015 EUR (€)	Feb. 04, 2015 GBP (£)
Line of Credit Facility [Line Items]
Credit facility										$ 722,108,000					$ 616,614,000
Mezzanine facility, net of discount										0					55,383,000
Carrying value of unencumbered assets										1,500,000,000
Bridge Loan Facility \| Bridge Loan Facility
Line of Credit Facility [Line Items]
Bridge commitment						$ 150,000,000.0
Debt term						364 days
Commitment fee						1.50%
Mortgage notes payable \| Mezzanine Facility
Line of Credit Facility [Line Items]
Repayment of debt				$ 56,500,000	€ 52,700,000
Bridge commitment \| €																			€ 128,000,000
Fair value of credit facility																		$ 107,000,000
Stated interest rate																		8.25%	8.25%
Mezzanine facility, net of discount															55,400,000	€ 52,700,000
Unusual borrowing															0
KeyBank National Association \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)	$ 725,000,000.0
Increase in aggregate commitments (up to)	225,000,000.0
Total line of credit commitment	$ 950,000,000.0
Number of extensions (extension) \| extension	1	1	1
Extension term	1 year	1 year	1 year
KeyBank National Association \| LIBOR \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Interest rate spread	1.00%	1.00%	1.00%
KeyBank National Association \| Federal Funds \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Interest rate spread	0.50%	0.50%	0.50%
KeyBank National Association \| Maximum \| Base Rate \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Interest rate spread	1.20%	1.20%	1.20%
KeyBank National Association \| Maximum \| LIBOR \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Interest rate spread	2.20%	2.20%	2.20%
KeyBank National Association \| Minimum \| Base Rate \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Interest rate spread	0.60%	0.60%	0.60%
KeyBank National Association \| Minimum \| LIBOR \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Interest rate spread	1.60%	1.60%	1.60%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit facility																						€ 110,500,000	£ 68,500,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A.
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)							$ 50,000,000
Credit facility										$ 722,100,000	€ 255,700,000	£ 160,200,000	€ 310,200,000	£ 177,200,000	616,600,000	€ 258,900,000	£ 177,200,000
Extension fee																				$ 1,500,000
Commitment fee percentage							50.00%
Weighted average annual interest rate										2.70%	2.70%	2.70%
Remaining borrowing capacity										$ 4,800,000					113,000,000
Fair value of credit facility										722,100,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Subsequent Event \| Credit Facility
Line of Credit Facility [Line Items]
Termination of credit facility	$ 725,800,000
Repayments of credit facility with proceeds from new credit facility	720,900,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Subsequent Event \| Credit Facility, Euro
Line of Credit Facility [Line Items]
Termination of credit facility \| €		€ 255,700,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Subsequent Event \| Credit Facility, Pounds
Line of Credit Facility [Line Items]
Termination of credit facility \| £			£ 160,200,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Subsequent Event \| Credit Facility, Dollar
Line of Credit Facility [Line Items]
Termination of credit facility \| €		€ 221,600,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Subsequent Event \| Line of Credit \| Credit Facility
Line of Credit Facility [Line Items]
Repayment of debt	4,900,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Line of Credit Facility, Base Rate, Option Three
Line of Credit Facility [Line Items]
Interest rate spread							1.00%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Above Threshold
Line of Credit Facility [Line Items]
Unused capacity commitment fee							0.25%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Below Threshold
Line of Credit Facility [Line Items]
Unused capacity commitment fee							0.15%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Federal Funds \| Line of Credit Facility, Base Rate, Option Two
Line of Credit Facility [Line Items]
Interest rate spread							0.50%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Maximum
Line of Credit Facility [Line Items]
Increase in additional borrowing capacity																					$ 740,000,000
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Maximum \| Base Rate \| Line of Credit Facility, Interest Rate, Option Two
Line of Credit Facility [Line Items]
Interest rate spread							1.20%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Maximum \| LIBOR \| Line of Credit Facility, Interest Rate, Option One
Line of Credit Facility [Line Items]
Interest rate spread							2.20%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Minimum \| Base Rate \| Line of Credit Facility, Interest Rate, Option Two
Line of Credit Facility [Line Items]
Interest rate spread							0.60%
Revolving Credit Facility \| JPMorgan Chase Bank, N.A. \| Minimum \| LIBOR \| Line of Credit Facility, Interest Rate, Option One
Line of Credit Facility [Line Items]
Interest rate spread							1.60%
Revolving Credit Facility \| KeyBank National Association \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)	500,000,000.0
Credit facility	$ 409,000,000
Facility fee multiplier	0.003	0.003	0.003
Remaining borrowing capacity	$ 4,100,000
Revolving Credit Facility \| KeyBank National Association \| Subsequent Event \| Unsecured Debt \| New Credit Facility, Euro
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)	34,700,000.0							€ 30,000,000.0
Revolving Credit Facility \| KeyBank National Association \| Subsequent Event \| Unsecured Debt \| New Credit Facility, Pounds
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)	$ 52,200,000.0								£ 40,000,000.0
Revolving Credit Facility \| KeyBank National Association \| Above Threshold \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Unused capacity commitment fee	0.25%	0.25%	0.25%
Commitment fee percentage	50.00%							50.00%	50.00%
Revolving Credit Facility \| KeyBank National Association \| Below Threshold \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Unused capacity commitment fee	0.15%	0.15%	0.15%
Commitment fee percentage	50.00%							50.00%	50.00%
Term Loan Facility \| KeyBank National Association \| Subsequent Event \| Unsecured Debt \| New Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity (up to)	$ 225,000,000.0							€ 194,600,000
Credit facility	720,900,000
Term Loan Facility \| KeyBank National Association \| Subsequent Event \| Unsecured Debt \| New Credit Facility, Euro
Line of Credit Facility [Line Items]
Credit facility	225,000,000							€ 194,600,000
Cash Flow Hedging \| Swap \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional Amount										967,797,000					905,374,000
Cash Flow Hedging \| GBP \| Swap \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional Amount										499,576,000					474,161,000
Cash Flow Hedging \| GBP \| Swap \| Designated as Hedging Instrument \| Revolving Credit Facility \| Subsequent Event \| Credit Facility
Line of Credit Facility [Line Items]
Notional Amount	160,300,000
Cash Flow Hedging \| GBP \| Swap \| Designated as Hedging Instrument \| Revolving Credit Facility \| Subsequent Event \| New Credit Facility
Line of Credit Facility [Line Items]
Notional Amount	$ 150,000,000
Derivative, term of contract	4 years 12 months	4 years 12 months	4 years 12 months
Cash Flow Hedging \| EUR \| Swap \| Designated as Hedging Instrument
Line of Credit Facility [Line Items]
Notional Amount										$ 468,221,000					$ 431,213,000
Cash Flow Hedging \| EUR \| Swap \| Designated as Hedging Instrument \| Subsequent Event
Line of Credit Facility [Line Items]
Notional Amount	$ 224,400,000