|
Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed (Detail) (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
$ 134,461good_PurchasePriceOfAcquiredProperty
|
$ 131,188good_PurchasePriceOfAcquiredProperty
|
| Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
8,386us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
9,069us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Above Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
387us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember
|
336us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember
|
| Below Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(1,236)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
(1,224)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
| Discount on Assumed Debt [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(249)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_DiscountPremiumOnAssumedDebtMember
|
|
| Egg Harbor Township, NJ [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
|
5,650good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
|
| Egg Harbor Township, NJ [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
259us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Vance, AL [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
|
13,388good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
|
| Vance, AL [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
627us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Blaine, MN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
|
14,450good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
|
| Blaine, MN [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
816us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Austin, Texas [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
|
57,000good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
|
| Austin, Texas [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
3,793us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Austin, Texas [Member] | Below Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
(1,168)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
| Allen, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
5,525good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
|
15,150good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
|
| Allen, TX [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
218us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
1,499us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Allen, TX [Member] | Above Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
336us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember
|
| Allen, TX [Member] | Discount on Assumed Debt [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(72)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_DiscountPremiumOnAssumedDebtMember
|
|
| Englewood, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
|
18,250good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
|
| Englewood, CO [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,850us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Englewood, CO [Member] | Below Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
(56)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
| Novi, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
|
7,300good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
|
| Novi, MI [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
225us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
| Colleyville, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
4,523good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
|
|
| Colleyville, TX [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
181us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Colleyville, TX [Member] | Below Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(6)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
|
| Colleyville, TX [Member] | Discount on Assumed Debt [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(59)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_DiscountPremiumOnAssumedDebtMember
|
|
| Rancho Cordova, CA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
8,225good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
|
|
| Rancho Cordova, CA [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
278us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Coppell, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
5,838good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
|
|
| Coppell, TX [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
230us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Coppell, TX [Member] | Discount on Assumed Debt [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(118)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_DiscountPremiumOnAssumedDebtMember
|
|
| Columbus, OH [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
11,800good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
|
|
| Columbus, OH [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
990us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Columbus, OH [Member] | Above Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
261us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember
|
|
| Taylor, PA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
39,000good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
|
|
| Taylor, PA [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
2,870us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Aurora, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
8,300good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
|
|
| Aurora, CO [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
282us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Indianapolis, IN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
10,500good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
|
|
| Indianapolis, IN [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
732us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Indianapolis, IN [Member] | Above Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
126us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_AboveMarketLeasesMember
|
|
| Indianapolis, IN [Member] | Below Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(13)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
|
| Denver, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
10,000good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
|
|
| Denver, CO [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
652us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Denver, CO [Member] | Below Market Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
(1,217)us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= good_BelowMarketLeaseMember
|
|
| Monroe, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Total Purchase Price |
30,750good_PurchasePriceOfAcquiredProperty
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
|
|
| Monroe, MI [Member] | Customer Relationships [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,953us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
|
|
| Land [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
14,566us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
10,028us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Egg Harbor Township, NJ [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,627us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Vance, AL [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
457us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Blaine, MN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,060us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Austin, Texas [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
2,330us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Allen, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
874us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
2,699us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Englewood, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,503us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Novi, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
352us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
| Land [Member] | Colleyville, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,277us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Rancho Cordova, CA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
752us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Coppell, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,448us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Columbus, OH [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
990us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Taylor, PA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
3,102us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Aurora, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
2,882us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Indianapolis, IN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
502us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Denver, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,621us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Land [Member] | Monroe, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,118us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
|
|
| Building [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
85,016us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
80,011us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Egg Harbor Township, NJ [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
2,735us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Vance, AL [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
9,721us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Blaine, MN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
9,347us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Austin, Texas [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
37,207us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Allen, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
3,509us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
5,758us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Englewood, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
9,889us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Novi, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
5,354us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
| Building [Member] | Colleyville, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
2,307us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Rancho Cordova, CA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
5,898us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Coppell, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
3,221us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Columbus, OH [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
6,080us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Taylor, PA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
24,449us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Aurora, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
3,825us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Indianapolis, IN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
5,334us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Denver, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
6,503us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Building [Member] | Monroe, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
23,890us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
|
|
| Tenant Improvements [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
6,231us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
13,385us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Egg Harbor Township, NJ [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
282us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Vance, AL [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
808us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Blaine, MN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,172us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Austin, Texas [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
6,814us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Allen, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
125us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
2,187us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Englewood, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,850us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Novi, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
272us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
| Tenant Improvements [Member] | Colleyville, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
117us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Rancho Cordova, CA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
278us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Coppell, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
128us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Columbus, OH [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,937us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Taylor, PA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
956us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Aurora, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
92us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Indianapolis, IN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,088us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Denver, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
568us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| Tenant Improvements [Member] | Monroe, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
942us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_TenantImprovementMember
|
|
| In-Place Leases [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
14,239us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
13,358us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Egg Harbor Township, NJ [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
558us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Vance, AL [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,097us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Blaine, MN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,361us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Austin, Texas [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
6,118us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Allen, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
598us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
1,525us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Englewood, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
2,036us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Novi, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
663us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
| In-Place Leases [Member] | Colleyville, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
486us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Rancho Cordova, CA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
473us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Coppell, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
636us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Columbus, OH [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
823us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Taylor, PA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
6,171us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Aurora, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
413us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Indianapolis, IN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,990us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Denver, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,152us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| In-Place Leases [Member] | Monroe, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,497us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_InPlaceLeasesMember
|
|
| Leasing Costs [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
7,121us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
6,225us-gaap_FairValueOfAssetsAcquired
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Egg Harbor Township, NJ [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
189us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EggHarborTownshipNjMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Vance, AL [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
678us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_VanceAlMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Blaine, MN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
694us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_BlaineMnMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Austin, Texas [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,906us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AustinTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Allen, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
273us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
1,146us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AllenTxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Englewood, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
1,178us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_EnglewoodCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Novi, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
|
434us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_NoviMiMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
| Leasing Costs [Member] | Colleyville, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
220us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColleyvilletxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Rancho Cordova, CA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
546us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_RanchoCordovaCaliforniaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Coppell, TX [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
293us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_CoppelltxMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Columbus, OH [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
719us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_ColumbusOHMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Taylor, PA [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
1,452us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_TaylorpaMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Aurora, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
806us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_AuroraMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Indianapolis, IN [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
741us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_IndianapolisMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Denver, CO [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
721us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_DenverCoMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|
| Leasing Costs [Member] | Monroe, MI [Member] |
|
|
| Business Acquisition [Line Items] |
|
|
| Fair value of acquired assets related to the properties acquired |
$ 1,350us-gaap_FairValueOfAssetsAcquired
/ us-gaap_BusinessAcquisitionAxis
= good_MonroeMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= good_LeasingCostsMember
|
|