Weighted average amortization period of below market leases acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

+ Details

Name:	hgit_AcquiredBelowMarketLeasesWeightedAverageUsefulLife
Namespace Prefix:	hgit_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

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

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_BusinessAcquisitionAxis=hgit_RookwoodMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=hgit_BelowMarketLeaseLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=hgit_MontroseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=hgit_QueensCourtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Recent Acquisitions of Real Estate (Intangible Assets) (Details)	Oct. 11, 2017	Mar. 24, 2017	Jan. 06, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Lease term	999 years
Rookwood \| In-Place Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, in-place and above-market lease assets			8 years 3 months 18 days
Rookwood \| Above-Market Lease Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, in-place and above-market lease assets			15 years 8 months 12 days
Rookwood \| Below-Market Lease Liabilities
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, Below-market lease liabilities			13 years 8 months 12 days
Montrose Student Residences \| In-Place Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, in-place and above-market lease assets		6 years 6 months
Montrose Student Residences \| Above-Market Lease Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, in-place and above-market lease assets		0 years
Montrose Student Residences \| Below-Market Lease Liabilities
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, Below-market lease liabilities		18 years 10 months 24 days
Queens Court \| In-Place Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, in-place and above-market lease assets	10 months 24 days
Queens Court \| Above-Market Lease Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, in-place and above-market lease assets	0 years
Queens Court \| Below-Market Lease Liabilities
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period, Below-market lease liabilities	0 years