XML 19 R65.htm IDEA: XBRL DOCUMENT v3.20.1

Subsequent Events - (Details) $ / shares in Units, $ in Millions				1 Months Ended		3 Months Ended
	May 01, 2020 $ / shares	Apr. 28, 2020 $ / shares	Mar. 30, 2020 $ / shares	May 11, 2020 USD ($) unencumbered_asset $ / shares	Apr. 30, 2020 USD ($)	Mar. 31, 2020 $ / shares	Mar. 31, 2019 $ / shares
Subsequent Event [Line Items]
Stock distributions (in usd per share )			$ 0.000956284
Cash distributions declared per common share (in usd per share)			$ 0.35			$ 0.14	$ 0.17
Subsequent Event
Subsequent Event [Line Items]
Stock distributions (in usd per share )	$ 0.000956284	$ 0.000956284
Cash distributions declared per common share (in usd per share)	$ 0.35	$ 0.35		$ 0.35
Revolving Credit Facility | Line of Credit | Subsequent Event
Subsequent Event [Line Items]
Additional unencumbered assets | unencumbered_asset				7
Increase in liquidity | $				$ 200
Withdrawals from Revolving Credit Facility | $					$ 125
Term debt | Term debt | Interest Rate Swap | Subsequent Event
Subsequent Event [Line Items]
Derivative notional amount | $				$ 325

X

- Definition

Line of Credit Facility, Covenants, Increase (Decrease) in Tangible Net Worth

+ References

No definition available.

+ Details

Name:	gcnl_LineofCreditFacilityCovenantsIncreaseDecreaseinTangibleNetWorth
Namespace Prefix:	gcnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line of Credit facility, Covenant, Additional Unencumbered Assets

+ References

No definition available.

+ Details

Name:	gcnl_LineofCreditfacilityCovenantAdditionalUnencumberedAssets
Namespace Prefix:	gcnl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Stock Distribution Declared per Day

+ References

No definition available.

+ Details

Name:	gcnl_StockDistributionDeclaredperDay
Namespace Prefix:	gcnl_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAmountOfHedgedItem
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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