XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Mortgage Notes Payable, Net - Schedule of Long-term Debt Instruments (Details) £ in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2024 USD ($) property | Mar. 31, 2024 USD ($) property | Apr. 30, 2024 GBP (£) | Apr. 05, 2024 USD ($) property | Dec. 31, 2023 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Mortgage notes payable, net |  | $ 2,481,263 |  |  | $ 2,517,868
Mortgage Notes Payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 830 |  |  |
Outstanding loan amount |  | $ 2,618,157 |  |  | 2,665,383
Effective Interest Rate |  | 4.30% |  |  |
Mortgage discounts |  | $ (129,553) |  |  | (140,403)
Less: Deferred financing costs |  | (7,341) |  |  | (7,112)
Mortgage notes payable, net |  | $ 2,481,263 |  |  | 2,517,868
Mortgage Notes Payable | Finland Properties |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percentage fixed interest rate |  | 80.00% |  |  |
Percentage variable interest rate |  | 20.00% |  |  |
Mortgage Notes Payable | Finland Properties | Euribor Rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate spread |  | 1.40% |  |  |
Mortgage Notes Payable | Column Financial Mortgage Notes | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of debt | $ 9,300 |  |  |  |
Mortgage Notes Payable | EUR |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 8 |  |  |
Outstanding loan amount |  | $ 196,176 |  |  | 211,447
Mortgage Notes Payable | EUR | Finland Properties |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 5 |  |  |
Outstanding loan amount |  | $ 79,880 |  |  | 0
Effective Interest Rate |  | 5.10% |  |  |
Mortgage Notes Payable | EUR | Finland Properties |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 0 |  |  |
Outstanding loan amount |  | $ 0 |  |  | 81,695
Effective Interest Rate |  | 2.40% |  |  |
Mortgage Notes Payable | EUR | Benelux Properties |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 3 |  |  |
Outstanding loan amount |  | $ 116,296 |  |  | 129,752
Effective Interest Rate |  | 1.40% |  |  |
Mortgage Notes Payable | GBP |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 3 |  |  |
Outstanding loan amount |  | $ 127,503 |  |  | 128,587
Mortgage Notes Payable | GBP | McLaren |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 3 |  |  |
Outstanding loan amount |  | $ 127,503 |  |  | 128,587
Effective Interest Rate |  | 6.10% |  |  |
Mortgage Notes Payable | GBP | McLaren | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Outstanding loan amount | £ |  |  | £ 101 |  |
Mortgage Notes Payable | USD |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 819 |  |  |
Outstanding loan amount |  | $ 2,294,478 |  |  | 2,325,349
Mortgage Notes Payable | USD | Penske Logistics |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 1 |  |  |
Outstanding loan amount |  | $ 70,000 |  |  | 70,000
Effective Interest Rate |  | 4.70% |  |  |
Mortgage Notes Payable | USD | Multi-Tenant Mortgage Loan I |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 10 |  |  |
Outstanding loan amount |  | $ 162,580 |  |  | 162,580
Effective Interest Rate |  | 4.40% |  |  |
Mortgage Notes Payable | USD | Multi-Tenant Mortgage Loan II |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 8 |  |  |
Outstanding loan amount |  | $ 32,750 |  |  | 32,750
Effective Interest Rate |  | 4.40% |  |  |
Mortgage Notes Payable | USD | Multi-Tenant Mortgage Loan III |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 7 |  |  |
Outstanding loan amount |  | $ 98,500 |  |  | 98,500
Effective Interest Rate |  | 4.90% |  |  |
Mortgage Notes Payable | USD | Multi-Tenant Mortgage Loan IV |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 16 |  |  |
Outstanding loan amount |  | $ 97,500 |  |  | 97,500
Effective Interest Rate |  | 4.60% |  |  |
Mortgage Notes Payable | USD | Multi-Tenant Mortgage Loan V |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 11 |  |  |
Outstanding loan amount |  | $ 139,771 |  |  | 139,771
Effective Interest Rate |  | 3.70% |  |  |
Mortgage Notes Payable | USD | 2019 Class A-1 Net-Lease Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 97 |  |  |
Outstanding loan amount |  | $ 110,673 |  |  | 110,815
Effective Interest Rate |  | 3.80% |  |  |
Mortgage Notes Payable | USD | 2019 Class A-2 Net-Lease Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 101 |  |  |
Outstanding loan amount |  | $ 119,257 |  |  | 119,409
Effective Interest Rate |  | 4.50% |  |  |
Mortgage Notes Payable | USD | 2021 Class A-1 Net-Lease Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 43 |  |  |
Outstanding loan amount |  | $ 50,971 |  |  | 50,971
Effective Interest Rate |  | 2.20% |  |  |
Mortgage Notes Payable | USD | 2021 Class A-2 Net-Lease Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 44 |  |  |
Outstanding loan amount |  | $ 88,041 |  |  | 88,041
Effective Interest Rate |  | 2.80% |  |  |
Mortgage Notes Payable | USD | 2021 Class A-3 Net-Lease Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 32 |  |  |
Outstanding loan amount |  | $ 34,997 |  |  | 34,997
Effective Interest Rate |  | 3.10% |  |  |
Mortgage Notes Payable | USD | 2021 Class A-4 Net-Lease Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 33 |  |  |
Outstanding loan amount |  | $ 54,995 |  |  | 54,995
Effective Interest Rate |  | 3.70% |  |  |
Mortgage Notes Payable | USD | Column Financial Mortgage Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 352 |  |  |
Outstanding loan amount |  | $ 692,018 |  |  | 697,595
Effective Interest Rate |  | 3.80% |  |  |
Number of Properties | property |  | 6 |  |  |
Number of real estate properties released by lender | property |  | 1 |  |  |
Number of real estate properties repaid | property |  | 3 |  |  |
Mortgage Notes Payable | USD | Column Financial Mortgage Notes | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Number of real estate properties remaining properties | property | 4 |  |  |  |
Mortgage Notes Payable | USD | Mortgage Loan II |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 12 |  |  |
Outstanding loan amount |  | $ 210,000 |  |  | 210,000
Effective Interest Rate |  | 4.30% |  |  |
Mortgage Notes Payable | USD | Mortgage Loan III |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 22 |  |  |
Outstanding loan amount |  | $ 33,400 |  |  | 33,400
Effective Interest Rate |  | 4.10% |  |  |
Mortgage Notes Payable | USD | RTL Multi-Tenant Mortgage II |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 0 |  |  |
Outstanding loan amount |  | $ 0 |  |  | 25,000
Effective Interest Rate |  | 0.00% |  |  |
Mortgage Notes Payable | USD | McGowin Park |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 1 |  |  |
Outstanding loan amount |  | $ 39,025 |  |  | 39,025
Effective Interest Rate |  | 4.10% |  |  |
Mortgage Notes Payable | USD | CMBS Loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  | 29 |  |  |
Outstanding loan amount |  | $ 260,000 |  |  | $ 260,000
Effective Interest Rate |  | 6.50% |  |  |
Mortgage Notes Payable | USD | CMBS Loan | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Encumbered Properties | property |  |  |  | 20 |
Outstanding loan amount |  |  |  | $ 237,000 |
Effective Interest Rate |  |  |  | 5.74% |

X
- Definition Number of Real Estate Properties, Encumbered + References No definition available. + Details
Name: | gnl_NumberOfRealEstatePropertiesEncumbered
Namespace Prefix: | gnl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Real Estate Properties Released By Lender + References No definition available. + Details
Name: | gnl_NumberOfRealEstatePropertiesReleasedByLender
Namespace Prefix: | gnl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Real Estate Properties Remaining Properties + References No definition available. + Details
Name: | gnl_NumberOfRealEstatePropertiesRemainingProperties
Namespace Prefix: | gnl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Real Estate Properties Repaid + References No definition available. + Details
Name: | gnl_NumberOfRealEstatePropertiesRepaid
Namespace Prefix: | gnl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Real Estate Properties Sold + References No definition available. + Details
Name: | gnl_NumberofRealEstatePropertiesSold
Namespace Prefix: | gnl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- 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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-4 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-6 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69F Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LongTermDebtPercentageBearingVariableInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_FinlandPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=gnl_EuriborRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_ColumnFinancialMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_FinlandProperty2Domain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_BeneluxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_GBP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_McLarenLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_PenskeLogisticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_U.S.MultiTenantMortgageLoanIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_U.S.MultiTenantMortgageLoanIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_U.S.MultiTenantMortgageLoanIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_U.S.MultiTenantMortgageLoanIVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_U.S.MultiTenantMortgageLoanVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_A2019ClassA1NetLeaseMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_A2019ClassA2NetLeaseMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_A2021ClassA1NetLeaseMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_A2021ClassA2NetLeaseMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_A2021ClassA3NetLeaseMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_A2021ClassA4NetLeaseMortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_MortgageLoanIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_MortgageLoanIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_RTLMultiTenantMortgageIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_McGowinParkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=gnl_CMBSLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |