XML 51 R35.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Real Estate and Intangible Assets - Summary of Properties Acquired (Details) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 03, 2023 USD ($) ft² tenant | Oct. 12, 2023 USD ($) ft² tenant | Jul. 28, 2023 USD ($) ft² tenant | Jul. 10, 2023 USD ($) ft² tenant | Apr. 14, 2023 USD ($) ft² tenant | Dec. 21, 2022 USD ($) ft² | Oct. 26, 2022 USD ($) ft² tenant | Sep. 20, 2022 USD ($) ft² tenant | Sep. 16, 2022 USD ($) ft² tenant | Aug. 05, 2022 USD ($) ft² property tenant | May 12, 2022 USD ($) ft² property tenant | May 04, 2022 USD ($) ft² property | Mar. 11, 2022 USD ($) ft² tenant | Feb. 24, 2022 USD ($) ft² tenant | Dec. 31, 2023 USD ($) ft² property | Dec. 31, 2022 USD ($) ft² property
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties acquired | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 | 13
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,018 | $ 115,364
Riverdale, Illinois |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  | 76,089 |  |  |  |  |  |  |  |  |  |  |
Weighted Average Lease Term |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |
Aggregate Purchase Price |  |  |  |  | $ 5,400 |  |  |  |  |  |  |  |  |  |  |
Number of tenants | tenant |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |
Dallas-Fort Worth, Texas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  | 100,000 | 7,714 |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Lease Term |  |  | 20 years | 9 years 10 months 24 days |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Purchase Price |  |  | $ 9,200 | $ 3,000 |  |  |  |  |  |  |  |  |  |  |  |
Number of tenants | tenant |  |  | 1 | 1 |  |  |  |  |  |  |  |  |  |  |  |
Allentown, Pennsylvania |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  | 69,920 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Lease Term |  | 20 years 1 month 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Purchase Price |  | $ 7,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tenants | tenant |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Indianapolis, Indiana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² | 67,709 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Lease Term | 20 years 1 month 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Purchase Price | $ 4,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tenants | tenant | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wilkesboro, North Carolina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  | 80,000 |  |
Weighted Average Lease Term |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 years 8 months 12 days |  |
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,500 |  |
Number of tenants | tenant |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |
Oklahoma City, Oklahoma |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  | 56,000 |  |  |
Weighted Average Lease Term |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000 |  |  |
Number of tenants | tenant |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Cleveland, Ohio And Fort Payne, Alabama |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties acquired | property |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  |  |  |  | 260,719 |  |  |  |
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  |  |  | $ 19,500 |  |  |  |
Wilmington, North Carolina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties acquired | property |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  |  |  | 345,584 |  |  |  |  |
Weighted Average Lease Term |  |  |  |  |  |  |  |  |  |  | 13 years 1 month 6 days |  |  |  |  |
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  |  | $ 18,900 |  |  |  |  |
Number of tenants | tenant |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |
Bridgeton and Vineland, New Jersey |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of properties acquired | property |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  |  | 246,000 |  |  |  |  |  |
Weighted Average Lease Term |  |  |  |  |  |  |  |  |  | 15 years 1 month 6 days |  |  |  |  |  |
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  | $ 32,700 |  |  |  |  |  |
Number of tenants | tenant |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |
Jacksonville, Florida |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  | 67,328 |  |  |  |  |  |  |
Weighted Average Lease Term |  |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |
Aggregate Purchase Price |  |  |  |  |  |  |  |  | $ 8,100 |  |  |  |  |  |  |
Number of tenants | tenant |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |
Fort Payne, Alabama |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  | 49,375 |  |  |  |  |  |  |  |
Weighted Average Lease Term |  |  |  |  |  |  |  | 14 years 9 months 18 days |  |  |  |  |  |  |  |
Aggregate Purchase Price |  |  |  |  |  |  |  | $ 5,600 |  |  |  |  |  |  | $ 5,600 |
Number of tenants | tenant |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |
Denver, Colorado |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  | 68,674 |  |  |  |  |  |  |  |  |
Weighted Average Lease Term |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |
Aggregate Purchase Price |  |  |  |  |  |  | $ 12,100 |  |  |  |  |  |  |  |  |
Number of tenants | tenant |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Greenville, South Carolina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  | 65,000 |  |  |  |  |  |  |  |  |  |
Weighted Average Lease Term |  |  |  |  |  | 12 years |  |  |  |  |  |  |  |  |  |
Aggregate Purchase Price |  |  |  |  |  | $ 5,000 |  |  |  |  |  |  |  |  |  |
Series of Property Acquisitions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Square Footage | ft² |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 321,432 | 1,238,680
Weighted Average Lease Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19 years 3 months 18 days | 14 years 6 months
Aggregate Purchase Price |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,018 | $ 115,364
Aggregate Capitalized Acquisition Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 528 | $ 1,014

X
- Definition Business acquisition expenses. + References No definition available. + Details
Name: | good_BusinessAcquisitionExpenses
Namespace Prefix: | good_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lease term available for lease. + References No definition available. + Details
Name: | good_LeaseTermAvailableForLease
Namespace Prefix: | good_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessor, Operating Lease, Number of Tenants + References No definition available. + Details
Name: | good_LessorOperatingLeaseNumberofTenants
Namespace Prefix: | good_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of properties acquired. + References No definition available. + Details
Name: | good_NumberOfPropertiesAcquired
Namespace Prefix: | good_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase price of acquired property. + References No definition available. + Details
Name: | good_PurchasePriceOfAcquiredProperty
Namespace Prefix: | good_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
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 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-5 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=good_RiverdaleIllinoisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_DallasFortWorthTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_AllentownPennsylvaniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_IndianapolisIndianaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_WilkesboroNorthCarolinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_OklahomaCityOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_ClevelandOhioAndFortPayneAlabamaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_WilmingtonNorthCarolinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_BridgetonAndVinelandNewJerseyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_JacksonvilleFloridaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_FortPayneAlabamaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_DenverColoradoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=good_GreenvilleSouthCarolinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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