$JBGS
JBG SMITH Properties Stock $jbgs

$jbgs Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000155837021001480 Filed on February 23, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$148.6M	$164.9M	$167.1M
YoY Change	-9.85%	0.99%	5.45%
Cost Of Revenue	$85.90M	$82.70M	$82.30M
YoY Change	3.87%	-12.86%	14.62%
Gross Profit	$62.80M	$82.20M	$84.70M
YoY Change	-23.6%	20.35%	-2.19%
Gross Profit Margin	42.25%	49.86%	50.7%
Selling, General & Admin	$15.40M	$23.90M	$20.60M
YoY Change	-35.56%	162.64%	-0.96%
% of Gross Profit	24.52%	29.08%	24.32%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$65.20M	$50.90M	$47.80M
YoY Change	28.09%	-25.91%	0.21%
% of Gross Profit	103.82%	61.92%	56.43%
Operating Expenses	$79.50M	$73.90M	$151.8M
YoY Change	7.58%	1.65%	5.91%
Operating Profit	-$16.70M	$8.300M	-$67.13M
YoY Change	-301.2%	-288.64%	-545.01%
Interest Expense	-$19.30M	-$8.800M	$10.58M
YoY Change	119.32%	7.32%	-44.24%
% of Operating Profit		-106.02%
Other Income/Expense, Net			-$4.279M
YoY Change			-140.93%
Pretax Income	-$50.70M	$38.10M	$10.96M
YoY Change	-233.07%	2141.18%	-57.07%
Income Tax	-$500.0K	-$600.0K	$432.0K
% Of Pretax Income		-1.57%	3.94%
Net Earnings	-$45.66M	$34.39M	$9.360M
YoY Change	-232.76%	4812.86%	-59.0%
Net Earnings / Revenue	-30.72%	20.86%	5.6%
Basic Earnings Per Share		$0.25	$0.06
Diluted Earnings Per Share	-$346.2K	$0.25	$0.06
COMMON SHARES
Basic Shares Outstanding	132.5M	134.1M shares	134.1M
Diluted Shares Outstanding			134.1M

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$225.6M	$126.4M	$230.1M
YoY Change	78.48%	-51.5%	-9.09%
Cash & Equivalents	$225.6M	$126.4M	$230.1M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$226.5M	$222.7M	$226.4M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$452.1M	$349.1M	$456.5M
YoY Change	29.5%	-22.53%	5.99%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.814B	$4.676B	$4.793B
YoY Change	2.94%	-1.37%	2.56%
Goodwill
YoY Change
Intangibles	$41.49M	$55.17M
YoY Change	-24.81%	-38.6%
Long-Term Investments	$461.4M	$543.0M	$320.9M
YoY Change	-15.03%	68.16%	-11.11%
Other Assets	$235.4M	$313.6M	$329.4M
YoY Change	-24.94%	-11.01%	-15.02%
Total Long-Term Assets	$5.627B	$5.637B	$5.566B
YoY Change	-0.17%	1.63%	-0.26%
TOTAL ASSETS
Total Short-Term Assets	$452.1M	$349.1M	$456.5M
Total Long-Term Assets	$5.627B	$5.637B	$5.566B
Total Assets	$6.080B	$5.986B	$6.022B
YoY Change	1.56%	-0.18%	0.18%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$103.1M	$157.7M	$160.0M
YoY Change	-34.62%	20.38%	8.7%
Accrued Expenses	$10.80M	$28.50M	$34.50M
YoY Change	-62.11%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$161.6M	$236.6M	$211.1M
YoY Change	-31.7%	22.02%	31.77%
LONG-TERM LIABILITIES
Long-Term Debt	$2.032B	$1.623B	$1.671B
YoY Change	25.19%	-24.55%	-19.75%
Other Long-Term Liabilities	$146.6M	$121.7M	$132.8M
YoY Change	20.46%	21.82%	2.15%
Total Long-Term Liabilities	$2.179B	$1.745B	$1.804B
YoY Change	24.86%	-22.49%	-18.47%
TOTAL LIABILITIES
Total Short-Term Liabilities	$161.6M	$236.6M	$211.1M
Total Long-Term Liabilities	$2.179B	$1.745B	$1.804B
Total Liabilities	$2.343B	$1.987B	$2.021B
YoY Change	17.91%	-18.96%	-15.04%
SHAREHOLDERS EQUITY
Retained Earnings	-$412.9M	-$231.2M	-$205.2M
YoY Change	78.64%	31.33%	86.17%
Common Stock	$1.319M	$1.342M	$1.342M
YoY Change	-1.71%	10.91%	10.91%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.206B	$3.386B	$3.414B
YoY Change
Total Liabilities & Shareholders Equity	$6.080B	$5.986B	$6.022B
YoY Change	1.56%	-0.18%	0.18%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	-$45.66M	$34.39M	$9.360M
YoY Change	-232.76%	4812.86%	-59.0%
Depreciation, Depletion And Amortization	$65.20M	$50.90M	$47.80M
YoY Change	28.09%	-25.91%	0.21%
Cash From Operating Activities	$41.10M	$61.40M	$59.80M
YoY Change	-33.06%	19.22%	38.43%
INVESTING ACTIVITIES
Capital Expenditures	-$82.50M	-$302.7M	-$114.0M
YoY Change	-72.75%	103.43%	20.38%
Acquisitions
YoY Change
Other Investing Activities	-$27.50M	$207.6M	$37.20M
YoY Change	-113.25%	64.5%	-71.88%
Cash From Investing Activities	-$110.0M	-$95.30M	-$76.70M
YoY Change	15.42%	321.68%	-303.99%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-160.5M	-67.30M	-36.20M
YoY Change	138.48%	601.04%	-195.77%
NET CHANGE
Cash From Operating Activities	41.10M	61.40M	59.80M
Cash From Investing Activities	-110.0M	-95.30M	-76.70M
Cash From Financing Activities	-160.5M	-67.30M	-36.20M
Net Change In Cash	-229.4M	-101.2M	-53.10M
YoY Change	126.68%	-624.35%	-144.77%
FREE CASH FLOW
Cash From Operating Activities	$41.10M	$61.40M	$59.80M
Capital Expenditures	-$82.50M	-$302.7M	-$114.0M
Free Cash Flow	$123.6M	$364.1M	$173.8M
YoY Change	-66.05%	81.78%	26.03%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilities
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001689796
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	134148000
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	131778000
CY2019Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilities
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-37994
CY2020	dei	Entity Registrant Name EntityRegistrantName	JBG SMITH PROPERTIES
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	81-4307010
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	4747 Bethesda Avenue
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Bethesda
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	MD
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	20814
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 200
CY2020	dei	City Area Code CityAreaCode	240
CY2020	dei	Local Phone Number LocalPhoneNumber	333-3600
CY2020	dei	Security12b Title Security12bTitle	Common Shares, par value $0.01 per share
CY2020	dei	Trading Symbol TradingSymbol	JBGS
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	jbgs	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	131600858
CY2020Q2	dei	Entity Public Float EntityPublicFloat	3800000000
CY2020Q2	us-gaap	Share Price SharePrice	29.57
CY2020Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	1391472000
CY2019Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	1240455000
CY2020Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	4341103000
CY2019Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	3880973000
CY2020Q4	us-gaap	Development In Process DevelopmentInProcess	268056000
CY2019Q4	us-gaap	Development In Process DevelopmentInProcess	654091000
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	6000631000
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	5775519000
CY2020Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1232690000
CY2019Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1119571000
CY2020Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	4767941000
CY2019Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	4655948000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	225600000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	126413000
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	37736000
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	16103000
CY2020Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	55903000
CY2019Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	52941000
CY2020Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	170547000
CY2019Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	169721000
CY2020Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	461369000
CY2019Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	543026000
CY2020Q4	us-gaap	Other Assets OtherAssets	286575000
CY2019Q4	us-gaap	Other Assets OtherAssets	253687000
CY2020Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	73876000
CY2019Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	168412000
CY2020Q4	us-gaap	Assets Assets	6079547000
CY2019Q4	us-gaap	Assets Assets	5986251000
CY2020Q4	us-gaap	Secured Debt SecuredDebt	1593738000
CY2019Q4	us-gaap	Secured Debt SecuredDebt	1125777000
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	200000000
CY2020Q4	us-gaap	Unsecured Debt UnsecuredDebt	397979000
CY2019Q4	us-gaap	Unsecured Debt UnsecuredDebt	297295000
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	103102000
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	157702000
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	247774000
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	206042000
CY2020Q4	us-gaap	Liabilities Liabilities	2342593000
CY2019Q4	us-gaap	Liabilities Liabilities	1986816000
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	530748000
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	612758000
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000
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CY2020Q4	us-gaap	Common Stock Value CommonStockValue	1319000
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	1342000
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3657643000
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3633042000
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-412944000
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-231164000
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-39979000
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-16744000
CY2020Q4	us-gaap	Minority Interest MinorityInterest	167000
CY2019Q4	us-gaap	Minority Interest MinorityInterest	201000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3206206000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3386677000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6079547000
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5986251000
CY2020	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	458958000
CY2019	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	493273000
CY2018	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	513447000
CY2020	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	113939000
CY2019	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	120886000
CY2018	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	98699000
CY2020	us-gaap	Other Income OtherIncome	29826000
CY2019	us-gaap	Other Income OtherIncome	33611000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	3206039000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	3386476000
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CY2020	us-gaap	Revenues Revenues	602723000
CY2019	us-gaap	Revenues Revenues	647770000
CY2018	us-gaap	Revenues Revenues	644182000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	221756000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	191580000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	211436000
CY2020	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	145625000
CY2019	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	137622000
CY2018	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	148081000
CY2020	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	70958000
CY2019	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	70493000
CY2018	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	71054000
CY2020	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	46634000
CY2019	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	46822000
CY2018	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	33728000
CY2020	jbgs	Third Party Real Estate Services ThirdPartyRealEstateServices	114829000
CY2019	jbgs	Third Party Real Estate Services ThirdPartyRealEstateServices	113495000
CY2018	jbgs	Third Party Real Estate Services ThirdPartyRealEstateServices	89826000
CY2020	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	31678000
CY2019	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	42162000
CY2018	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	36030000
CY2020	jbgs	Transactionandothercosts Transactionandothercosts	8670000
CY2019	jbgs	Transactionandothercosts Transactionandothercosts	23235000
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CY2020	us-gaap	Costs And Expenses CostsAndExpenses	640150000
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	625409000
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CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-20336000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1395000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	39409000
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	15168000
CY2020	us-gaap	Interest Expense InterestExpense	62321000
CY2019	us-gaap	Interest Expense InterestExpense	52695000
CY2018	us-gaap	Interest Expense InterestExpense	74447000
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	59477000
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	-625000
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	5385000
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CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-62000
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5805000
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CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10232000
CY2018	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	7606000
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-34099000
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	50481000
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	19554000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-71526000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	72842000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	45875000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4265000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1302000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-738000
CY2020	us-gaap	Profit Loss ProfitLoss	-67261000
CY2019	us-gaap	Profit Loss ProfitLoss	74144000
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CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	8573000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6710000
CY2018	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-21000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-62303000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	65571000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	39924000
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.49
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.48
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.31
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	133451000
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	130687000
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	119176000
CY2020	us-gaap	Profit Loss ProfitLoss	-67261000
CY2019	us-gaap	Profit Loss ProfitLoss	74144000
CY2018	us-gaap	Profit Loss ProfitLoss	46613000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-38137000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-27722000
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	5382000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-11912000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1694000
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1090000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-26225000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-26028000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6472000
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-93486000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	48116000
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	53085000
CY2020	jbgs	Comprehensive Net Loss Attributable To Redeemable Noncontrolling Interest ComprehensiveNetLossAttributableToRedeemableNoncontrollingInterest	-4958000
CY2020Q4	jbgs	Equity Method Investment Long Term Debt Percentage Bearing Fixed Interest Percentage Rate EquityMethodInvestmentLongTermDebtPercentageBearingFixedInterestPercentageRate	0.0401
CY2019	jbgs	Comprehensive Net Loss Attributable To Redeemable Noncontrolling Interest ComprehensiveNetLossAttributableToRedeemableNoncontrollingInterest	8573000
CY2018	jbgs	Comprehensive Net Loss Attributable To Redeemable Noncontrolling Interest ComprehensiveNetLossAttributableToRedeemableNoncontrollingInterest	6710000
CY2020	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	-2990000
CY2019	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	-2584000
CY2018	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	1384000
CY2018	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-21000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-85538000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	42127000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	45012000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2974814000
CY2018	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	39903000
CY2018	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	109122000
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	741000
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.00
CY2018	us-gaap	Dividends Dividends	120133000
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	97000
CY2018	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-17556000
CY2018	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	5550000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6472000
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	364000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2987352000
CY2019	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	65571000
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	472780000
CY2019	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	57318000
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1803000
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.90
CY2019	us-gaap	Dividends Dividends	120717000
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3000
CY2019	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-51399000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-26028000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3386677000
CY2020	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	-62303000
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	47517000
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	104774000
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2242000
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.90
CY2020	us-gaap	Dividends Dividends	119477000
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	34000
CY2020	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	82583000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-26225000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3206206000
CY2020	us-gaap	Profit Loss ProfitLoss	-67261000
CY2019	us-gaap	Profit Loss ProfitLoss	74144000
CY2018	us-gaap	Profit Loss ProfitLoss	46613000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	66051000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	65273000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	52675000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	225597000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	195795000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	215659000
CY2020	us-gaap	Straight Line Rent StraightLineRent	20084000
CY2018	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	7606000
CY2019	us-gaap	Straight Line Rent StraightLineRent	39174000
CY2018	us-gaap	Straight Line Rent StraightLineRent	14056000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-20336000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1395000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	39409000
CY2020	jbgs	Amortization Of Acquired Below Market Lease Net Of Acquired Above Market Lease AmortizationOfAcquiredBelowMarketLeaseNetOfAcquiredAboveMarketLease	442000
CY2019	jbgs	Amortization Of Acquired Below Market Lease Net Of Acquired Above Market Lease AmortizationOfAcquiredBelowMarketLeaseNetOfAcquiredAboveMarketLease	791000
CY2018	jbgs	Amortization Of Acquired Below Market Lease Net Of Acquired Above Market Lease AmortizationOfAcquiredBelowMarketLeaseNetOfAcquiredAboveMarketLease	220000
CY2020	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	6603000
CY2019	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	6336000
CY2018	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	3406000
CY2020	jbgs	Gain Loss On Debt Extinguishment Including Prepayment Penalty GainLossOnDebtExtinguishmentIncludingPrepaymentPenalty	-62000
CY2019	jbgs	Gain Loss On Debt Extinguishment Including Prepayment Penalty GainLossOnDebtExtinguishmentIncludingPrepaymentPenalty	-5805000
CY2018	jbgs	Gain Loss On Debt Extinguishment Including Prepayment Penalty GainLossOnDebtExtinguishmentIncludingPrepaymentPenalty	-4536000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10232000
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	59477000
CY2019	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	104991000
CY2018	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	52183000
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	25805000
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1560000
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3298000
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	4302000
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2690000
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	7827000
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4326000
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-567000
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-462000
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	10170000
CY2020	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	9231000
CY2019	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	8382000
CY2018	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	5582000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	11075000
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	9177000
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	16600000
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	591000
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-7678000
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-5984000
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-27314000
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-19556000
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-19855000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	169021000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	173986000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	188193000
CY2020	jbgs	Payments To Develop Real Estate Assets Construction In Progress And Real Estate Additions PaymentsToDevelopRealEstateAssetsConstructionInProgressAndRealEstateAdditions	307497000
CY2019	jbgs	Payments To Develop Real Estate Assets Construction In Progress And Real Estate Additions PaymentsToDevelopRealEstateAssetsConstructionInProgressAndRealEstateAdditions	441014000
CY2018	jbgs	Payments To Develop Real Estate Assets Construction In Progress And Real Estate Additions PaymentsToDevelopRealEstateAssetsConstructionInProgressAndRealEstateAdditions	385943000
CY2020	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	45688000
CY2019	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	165208000
CY2018	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	23246000
CY2020	jbgs	Payments For Deposits On Real Estate And Other Acquisitions PaymentsForDepositsOnRealEstateAndOtherAcquisitions	25424000
CY2019	jbgs	Payments For Deposits On Real Estate And Other Acquisitions PaymentsForDepositsOnRealEstateAndOtherAcquisitions	850000
CY2020	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	154493000
CY2019	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	377511000
CY2018	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	413077000
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	386000
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	71065000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	7557000
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	14408000
CY2018	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	80279000
CY2020	us-gaap	Payments To Acquire Real Estate And Real Estate Joint Ventures PaymentsToAcquireRealEstateAndRealEstateJointVentures	14639000
CY2019	us-gaap	Payments To Acquire Real Estate And Real Estate Joint Ventures PaymentsToAcquireRealEstateAndRealEstateJointVentures	18668000
CY2018	us-gaap	Payments To Acquire Real Estate And Real Estate Joint Ventures PaymentsToAcquireRealEstateAndRealEstateJointVentures	31197000
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	665000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-167690000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-240672000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	66327000
CY2018	jbgs	Payments To Acquire Interest In Consolidated Real Estate Venture Classified As Financing Activities PaymentsToAcquireInterestInConsolidatedRealEstateVentureClassifiedAsFinancingActivities	5550000
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3531000
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	137000
CY2018	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	114000
CY2020	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	580105000
CY2019	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	2200000
CY2018	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	118141000
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	500000000
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	200000000
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	35000000
CY2020	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	100000000
CY2018	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	250000000
CY2020	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	104083000
CY2019	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	719003000
CY2018	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	312894000
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	700000000
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	150751000
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	14856000
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	515000
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3114000
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	472780000
CY2020	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	1715000
CY2019	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	1457000
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	597000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	104774000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	120011000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	129834000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	107372000
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	15030000
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17390000
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	17398000
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	46000
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	95000
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	340000
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	207000
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	250000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	119489000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-190330000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-193545000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	120820000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-257016000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	60975000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	142516000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	399532000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	338557000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	263336000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	142516000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	399532000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	225600000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	126413000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	260553000
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	37736000
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	16103000
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	138979000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	263336000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	142516000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	399532000
CY2020	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	13189000
CY2019	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	29806000
CY2018	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	20804000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	56961000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	49437000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	64605000
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	43188000
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	84076000
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	53073000
CY2020	jbgs	Write Off Of Fully Depreciated Assets Including Asset Impairment WriteOffOfFullyDepreciatedAssetsIncludingAssetImpairment	30798000
CY2019	jbgs	Write Off Of Fully Depreciated Assets Including Asset Impairment WriteOffOfFullyDepreciatedAssetsIncludingAssetImpairment	66533000
CY2018	jbgs	Write Off Of Fully Depreciated Assets Including Asset Impairment WriteOffOfFullyDepreciatedAssetsIncludingAssetImpairment	52272000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1187000
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	282000
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1965000
CY2019	jbgs	Deconsolidation Of Properties DeconsolidationOfProperties	181813000
CY2018	jbgs	Deconsolidation Of Properties DeconsolidationOfProperties	95923000
CY2020Q4	jbgs	Dividends Payable Common Shareholders DividendsPayableCommonShareholders	29650000
CY2019Q4	jbgs	Dividends Payable Common Shareholders DividendsPayableCommonShareholders	30184000
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	6202000
CY2018Q4	jbgs	Dividends Payable Common Shareholders DividendsPayableCommonShareholders	39298000
CY2020Q4	jbgs	Dividends Payable Redeemable Noncontrolling Interest DividendsPayableRedeemableNoncontrollingInterest	4425000
CY2019Q4	jbgs	Dividends Payable Redeemable Noncontrolling Interest DividendsPayableRedeemableNoncontrollingInterest	3828000
CY2018Q4	jbgs	Dividends Payable Redeemable Noncontrolling Interest DividendsPayableRedeemableNoncontrollingInterest	5896000
CY2020	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	47517000
CY2019	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	57318000
CY2018	us-gaap	Conversion Of Stock Amount Converted1 ConversionOfStockAmountConverted1	109208000
CY2020	jbgs	Recognition Derecognition Of Operating Lease Right Of Use Assets RecognitionDerecognitionOfOperatingLeaseRightOfUseAssets	-13151000
CY2019	jbgs	Recognition Derecognition Of Operating Lease Right Of Use Assets RecognitionDerecognitionOfOperatingLeaseRightOfUseAssets	35318000
CY2020	jbgs	Recognition Derecognition Of Liabilities Related To Operating Lease Right Of Use Assets RecognitionDerecognitionOfLiabilitiesRelatedToOperatingLeaseRightOfUseAssets	-13151000
CY2019	jbgs	Recognition Derecognition Of Liabilities Related To Operating Lease Right Of Use Assets RecognitionDerecognitionOfLiabilitiesRelatedToOperatingLeaseRightOfUseAssets	37922000
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	42354000
CY2020	jbgs	Finance Lease Liability Obtained In Exchange For Right Of Use Asset FinanceLeaseLiabilityObtainedInExchangeForRightOfUseAsset	40684000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	5201000
CY2020	jbgs	Deferred Purchase Price On Acquisition DeferredPurchasePriceOnAcquisition	19479000
CY2020Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	62
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;margin:0pt 0pt 12pt 0pt;">Use of Estimates</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 12pt 0pt;">The preparation of the financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates include: (i) the underlying cash flows and holding periods used in assessing impairment; (ii) the determination of useful lives for tangible and intangible assets; and (iii) the assessment of the collectability of receivables, including deferred rent receivables. Due to the current pandemic of the novel coronavirus ("COVID-19"), commencing in March 2020, authorities in jurisdictions where our properties are located issued stay-at-home orders and restrictions on travel and permitted businesses operations. The effects of COVID-19 have most significantly impacted the operations of many of our retail tenants, which generated approximately 7% of our revenue for the year ended December 31, 2020, revenue from our multifamily assets, our commercial parking revenue, the operations of the Crystal City Marriott and our interest in the former unconsolidated venture that owns The Marriott Wardman Park hotel. The extent to which COVID-19 impacts us and our tenants will depend on future developments, which are highly uncertain. At this time, there are no outstanding stay-at-home orders in jurisdictions where our properties are located; however, the extent and duration of restrictions on travel and permitted businesses operations and other effects of COVID-19 on us and our tenants have affected estimates used in the preparation of the underlying cash flows used in assessing our long-lived assets for impairment and the assessment of the collectability of receivables from tenants, including deferred rent receivables. We have made what we believe to be appropriate accounting estimates based on the facts and circumstances available as of the reporting date. To the extent these estimates differ from actual results, our consolidated financial statements may be materially affected. </p>
CY2020	jbgs	Retail Tenants Revenue Percent RetailTenantsRevenuePercent	0.07
CY2020	jbgs	Lease Income Guarantee LeaseIncomeGuarantee	8200000
CY2020	jbgs	Lease Deferral Requests Due To Unusual Event LeaseDeferralRequestsDueToUnusualEvent	4300000
CY2020	jbgs	Bill Rent Receivable Reserve BillRentReceivableReserve	11200000
CY2020	jbgs	Deferred Straight Line Rent Receivables Reserve DeferredStraightLineRentReceivablesReserve	19600000
CY2020Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	39077000
CY2019Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	37823000
CY2020Q4	jbgs	Management Fee Receivable ManagementFeeReceivable	15658000
CY2019Q4	jbgs	Management Fee Receivable ManagementFeeReceivable	14541000
CY2020Q4	us-gaap	Other Receivables OtherReceivables	1168000
CY2019Q4	us-gaap	Other Receivables OtherReceivables	577000
CY2020Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	55903000
CY2019Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	52941000
CY2020Q4	jbgs	Lease Guarantee Receivables LeaseGuaranteeReceivables	8200000
CY2020Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	461369000
CY2019Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	543026000
CY2020Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	18900000
CY2019Q4	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	14300000
CY2020Q4	jbgs	Equity Method Investment Long Term Debt Percentage Bearing Variable Interest Percentage Rate EquityMethodInvestmentLongTermDebtPercentageBearingVariableInterestPercentageRate	0.0252
CY2020Q4	jbgs	Equity Method Investment Long Term Debt Bearing Variable Amount EquityMethodInvestmentLongTermDebtBearingVariableAmount	863617000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-738000
CY2019Q4	jbgs	Equity Method Investment Long Term Debt Bearing Variable Amount EquityMethodInvestmentLongTermDebtBearingVariableAmount	629479000
CY2020Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	6656000
CY2020Q4	jbgs	Equity Method Investment Long Term Debt Bearing Fixed Amount EquityMethodInvestmentLongTermDebtBearingFixedAmount	323050000
CY2019Q4	jbgs	Equity Method Investment Long Term Debt Bearing Fixed Amount EquityMethodInvestmentLongTermDebtBearingFixedAmount	561236000
CY2020Q4	jbgs	Equity Method Investment Long Term Debt EquityMethodInvestmentLongTermDebt	1186667000
CY2019Q4	jbgs	Equity Method Investment Long Term Debt EquityMethodInvestmentLongTermDebt	1190715000
CY2020Q4	jbgs	Equity Method Investment Unamortized Deferred Financing Costs EquityMethodInvestmentUnamortizedDeferredFinancingCosts	7479000
CY2019Q4	jbgs	Equity Method Investment Unamortized Deferred Financing Costs EquityMethodInvestmentUnamortizedDeferredFinancingCosts	2859000
CY2020Q4	jbgs	Equity Method Investment Long Term Debt Net EquityMethodInvestmentLongTermDebtNet	1179188000
CY2019Q4	jbgs	Equity Method Investment Long Term Debt Net EquityMethodInvestmentLongTermDebtNet	1187856000
CY2020Q4	jbgs	Equity Method Investment Summarized Financial Information Assets Real Estate Investment Property Net EquityMethodInvestmentSummarizedFinancialInformationAssetsRealEstateInvestmentPropertyNet	2247384000
CY2019Q4	jbgs	Equity Method Investment Summarized Financial Information Assets Real Estate Investment Property Net EquityMethodInvestmentSummarizedFinancialInformationAssetsRealEstateInvestmentPropertyNet	2493961000
CY2020Q4	jbgs	Equity Method Investment Summarized Financial Information Assets Other EquityMethodInvestmentSummarizedFinancialInformationAssetsOther	270516000
CY2019Q4	jbgs	Equity Method Investment Summarized Financial Information Assets Other EquityMethodInvestmentSummarizedFinancialInformationAssetsOther	291092000
CY2020Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	2517900000
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	2785053000
CY2020Q4	jbgs	Equity Method Investment Summarized Financial Information Liabilities Secured Debt EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesSecuredDebt	1179188000
CY2019Q4	jbgs	Equity Method Investment Summarized Financial Information Liabilities Secured Debt EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesSecuredDebt	1187856000
CY2020Q4	jbgs	Equity Method Investment Summarized Financial Information Liabilities Other EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOther	140304000
CY2019Q4	jbgs	Equity Method Investment Summarized Financial Information Liabilities Other EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOther	168243000
CY2020Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilities	1319492000
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilities	1356099000
CY2020Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	1198408000
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	1428954000
CY2020Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	2517900000
CY2019Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	2785053000
CY2020	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	203456000
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	266653000
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	300032000
CY2020	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	-21639000
CY2019	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	18041000
CY2018	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	56262000
CY2020	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-65756000
CY2019	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-32507000
CY2018	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-1155000000
CY2020Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	117141000
CY2019Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	126016000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15565000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	23644000
CY2020Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	43012000
CY2019Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	48620000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3542000
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	19865000
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	41996000
CY2020Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	14000000
CY2019Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	12556000
CY2019Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	3071000
CY2019Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	79814000
CY2019Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	126016000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	23644000
CY2020Q4	us-gaap	Deposit Assets DepositAssets	28560000
CY2019Q4	us-gaap	Deposit Assets DepositAssets	3210000
CY2020Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	16103000
CY2019Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	16705000
CY2020Q4	us-gaap	Other Assets OtherAssets	286575000
CY2019Q4	us-gaap	Other Assets OtherAssets	253687000
CY2020Q4	jbgs	Deposit To Acquire Wireless Spectrum License DepositToAcquireWirelessSpectrumLicense	25300000
CY2020Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	202940000
CY2020Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	85799000
CY2020Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	117141000
CY2019Q4	us-gaap	Deferred Costs Leasing Gross DeferredCostsLeasingGross	205830000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	34878000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	19313000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	15565000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	42447000
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	18803000
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	63400000
CY2020Q4	jbgs	Intangible Assets Accumulated Amortization IntangibleAssetsAccumulatedAmortization	20388000
CY2020Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	43012000
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	66156000
CY2019Q4	jbgs	Intangible Assets Accumulated Amortization IntangibleAssetsAccumulatedAmortization	17536000
CY2019Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	48620000
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13295000
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	15953000
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21561000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	9690000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	8662000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	8199000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	7841000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	3571000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	3524000
CY2019	jbgs	Amortizationof Intangible Liabilities AmortizationofIntangibleLiabilities	2500000
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	41487000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	5611000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	112516000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	373344000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	322571000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	558890000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	630937000
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2003869000
CY2020Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	33256000
CY2019Q4	us-gaap	Below Market Lease Gross BelowMarketLeaseGross	38577000
CY2020Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	22956000
CY2019Q4	us-gaap	Below Market Lease Accumulated Amortization BelowMarketLeaseAccumulatedAmortization	26253000
CY2020Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	10300000
CY2019Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	12324000
CY2020Q4	jbgs	Lease Assumptions Liabilities LeaseAssumptionsLiabilities	10126000
CY2019Q4	jbgs	Lease Assumptions Liabilities LeaseAssumptionsLiabilities	17589000
CY2020Q4	us-gaap	Incentive From Lessor IncentiveFromLessor	13913000
CY2019Q4	us-gaap	Incentive From Lessor IncentiveFromLessor	20854000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10752000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	28476000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	40221000
CY2020Q4	us-gaap	Advance Rent AdvanceRent	19809000
CY2019Q4	us-gaap	Advance Rent AdvanceRent	23612000
CY2020Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	13654000
CY2019Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	16348000
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	18242000
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17898000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	2509000
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	5542000
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	34075000
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	34012000
CY2020Q4	us-gaap	Derivative Instruments In Hedges Liabilities At Fair Value DerivativeInstrumentsInHedgesLiabilitiesAtFairValue	44222000
CY2019Q4	us-gaap	Derivative Instruments In Hedges Liabilities At Fair Value DerivativeInstrumentsInHedgesLiabilitiesAtFairValue	17440000
CY2020Q4	jbgs	Deferred Purchase Price DeferredPurchasePrice	19479000
CY2020Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	10472000
CY2019Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	11947000
CY2020	jbgs	Amortizationof Intangible Liabilities AmortizationofIntangibleLiabilities	2000000.0
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	247774000
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	206042000
CY2018	jbgs	Amortizationof Intangible Liabilities AmortizationofIntangibleLiabilities	2600000
CY2020Q4	us-gaap	Below Market Lease Amortization Income Next Twelve Months BelowMarketLeaseAmortizationIncomeNextTwelveMonths	1807000
CY2020Q4	us-gaap	Below Market Lease Amortization Income Year Two BelowMarketLeaseAmortizationIncomeYearTwo	1788000
CY2020Q4	us-gaap	Below Market Lease Amortization Income Year Three BelowMarketLeaseAmortizationIncomeYearThree	1780000
CY2020Q4	us-gaap	Below Market Lease Amortization Income Year Four BelowMarketLeaseAmortizationIncomeYearFour	1762000
CY2020Q4	us-gaap	Below Market Lease Amortization Income Year Five BelowMarketLeaseAmortizationIncomeYearFive	1221000
CY2020Q4	us-gaap	Below Market Lease Amortization Income After Year Five BelowMarketLeaseAmortizationIncomeAfterYearFive	1942000
CY2020Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	10300000
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	11000000.0
CY2020Q4	jbgs	Sec Schedule1228 Real Estate Companies Investmentin Real Estate Federal Income Tax Basis Difference SECSchedule1228RealEstateCompaniesInvestmentinRealEstateFederalIncomeTaxBasisDifference	168000000.0
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-1232000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-20000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3033000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1336000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-718000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4265000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1302000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-738000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2500000
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5500000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1921000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	721000
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2770000
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	915000
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	626000
CY2020Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	1283000
CY2020Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	1533000
CY2019Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	435000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	265000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	217000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	7772000
CY2018	jbgs	Common Stock Dividends Per Share Declared Taxableas Returnof Capital CommonStockDividendsPerShareDeclaredTaxableasReturnofCapital	0.469
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.90
CY2019	jbgs	Common Stock Dividends Per Share Declared Taxableas Ordinary Incomeinthe Current Year CommonStockDividendsPerShareDeclaredTaxableasOrdinaryIncomeintheCurrentYear	0.468
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2914000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2072000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	523000
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5700000
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2391000
CY2020Q4	jbgs	Deferred Tax Liabilities Intangible Assets DeferredTaxLiabilitiesIntangibleAssets	5887000
CY2019Q4	jbgs	Deferred Tax Liabilities Intangible Assets DeferredTaxLiabilitiesIntangibleAssets	7412000
CY2020Q4	jbgs	Deferred Tax Liabilities Real Estate DeferredTaxLiabilitiesRealEstate	2164000
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	158000
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	521000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	8209000
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7933000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2509000
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5542000
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.90
CY2020	jbgs	Common Stock Dividends Per Share Declared Taxableas Ordinary Incomeinthe Current Year CommonStockDividendsPerShareDeclaredTaxableasOrdinaryIncomeintheCurrentYear	0.405
CY2020	jbgs	Common Stock Dividends Per Share Declared Taxableas Returnof Capital CommonStockDividendsPerShareDeclaredTaxableasReturnofCapital	0.27
CY2020	jbgs	Common Stock Dividends Per Share Declared Taxable Statustobe Determinedin Next Year CommonStockDividendsPerShareDeclaredTaxableStatustobeDeterminedinNextYear	0.225
CY2019	jbgs	Common Stock Dividends Per Share Declared Taxableas Returnof Capital CommonStockDividendsPerShareDeclaredTaxableasReturnofCapital	0.432
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.00
CY2018	jbgs	Common Stock Dividends Per Share Declared Indicated Annual Amount CommonStockDividendsPerShareDeclaredIndicatedAnnualAmount	0.90
CY2018	jbgs	Common Stock Dividends Per Share Declared Additional Declared CommonStockDividendsPerShareDeclaredAdditionalDeclared	0.10
CY2018	jbgs	Common Stock Dividends Per Share Declared Taxableas Ordinary Incomeinthe Current Year CommonStockDividendsPerShareDeclaredTaxableasOrdinaryIncomeintheCurrentYear	0.531
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	612758000
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	558140000
CY2020	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	47517000
CY2019	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	57318000
CY2020	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	4066000
CY2019	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	3954000
CY2020	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	-4958000
CY2019	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	8573000
CY2020	jbgs	Temporary Equity Other Comprehensive Income Loss TemporaryEquityOtherComprehensiveIncomeLoss	-2990000
CY2019	jbgs	Temporary Equity Other Comprehensive Income Loss TemporaryEquityOtherComprehensiveIncomeLoss	-2584000
CY2020	jbgs	Temporary Equity Contributions Distributions TemporaryEquityContributionsDistributions	-15629000
CY2019	jbgs	Temporary Equity Contributions Distributions TemporaryEquityContributionsDistributions	-15254000
CY2020	jbgs	Temporary Equity Sharebased Compensation TemporaryEquitySharebasedCompensation	64611000
CY2019	jbgs	Temporary Equity Sharebased Compensation TemporaryEquitySharebasedCompensation	63264000
CY2020	jbgs	Temporary Equity Increase Decrease To Redemption Value TemporaryEquityIncreaseDecreaseToRedemptionValue	-79593000
CY2019	jbgs	Temporary Equity Increase Decrease To Redemption Value TemporaryEquityIncreaseDecreaseToRedemptionValue	53983000
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	530748000
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	612758000
CY2019	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	458329000
CY2020	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	38437000
CY2020	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	420521000
CY2019	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	34944000
CY2020	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	458958000
CY2019	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	493273000
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	389714000
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	318306000
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	271403000
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	237333000
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	197946000
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	946416000
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	70635000
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	67799000
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	56016000
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4584000
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	2526000
CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	3341000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	66051000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	65273000
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	52675000
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	46500000
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y9M18D
CY2020	jbgs	Defined Contribution Plan Employers Matching Contribution Vesting Period DefinedContributionPlanEmployersMatchingContributionVestingPeriod	P1Y
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2200000
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2000000.0
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1800000
CY2021Q1	jbgs	Share Based Compensation Arrangement By Share Based Payment Award Aggregate Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateGrantDateFairValue	24400000
CY2019	jbgs	Relocation Cost RelocationCost	10900000
CY2020	jbgs	Demolition Costs DemolitionCosts	682000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6710000
CY2019	jbgs	Demolition Costs DemolitionCosts	5432000
CY2020	us-gaap	Restructuring Charges RestructuringCharges	3694000
CY2019	us-gaap	Restructuring Charges RestructuringCharges	5252000
CY2018	us-gaap	Restructuring Charges RestructuringCharges	15907000
CY2020	jbgs	Completed Potential Integrated Transaction Costs CompletedPotentialIntegratedTransactionCosts	294000
CY2019	jbgs	Completed Potential Integrated Transaction Costs CompletedPotentialIntegratedTransactionCosts	651000
CY2018	jbgs	Completed Potential Integrated Transaction Costs CompletedPotentialIntegratedTransactionCosts	9008000
CY2020	us-gaap	Other Expenses OtherExpenses	4000000
CY2019	us-gaap	Other Expenses OtherExpenses	1000000
CY2018	us-gaap	Other Expenses OtherExpenses	2791000
CY2020	jbgs	Transactionandothercosts Transactionandothercosts	8670000
CY2019	jbgs	Transactionandothercosts Transactionandothercosts	23235000
CY2018	jbgs	Transactionandothercosts Transactionandothercosts	27706000
CY2020	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	70561000
CY2019	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	78313000
CY2018	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	90729000
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3315000
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3217000
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4661000
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1450000
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	921000
CY2018	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	922000
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-184000
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-50000
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	926000
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	135000
CY2020	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	13189000
CY2019	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	29806000
CY2018	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	20804000
CY2020	us-gaap	Interest Expense InterestExpense	62321000
CY2019	us-gaap	Interest Expense InterestExpense	52695000
CY2018	us-gaap	Interest Expense InterestExpense	74447000
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000
CY2020	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	3800000
CY2020	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	104800000
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	27.72
CY2020	jbgs	Operating And Finance Lease Fixed Lease Cost OperatingAndFinanceLeaseFixedLeaseCost	2900000
CY2021Q1	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	270862
CY2021Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	8100000
CY2021Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	29.93
CY2019Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	11500000
CY2019Q2	us-gaap	Shares Issued Price Per Share SharesIssuedPricePerShare	42.00
CY2019Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	472800000
CY2020	us-gaap	Profit Loss ProfitLoss	-67261000
CY2019	us-gaap	Profit Loss ProfitLoss	74144000
CY2018	us-gaap	Profit Loss ProfitLoss	46613000
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-4958000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	8573000
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6710000
CY2018	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-21000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-62303000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	65571000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	39924000
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	3100000
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	2489000
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	2599000
CY2020	jbgs	Net Income Loss Available To Common Stockholders Basic And Diluted NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted	-65403000
CY2019	jbgs	Net Income Loss Available To Common Stockholders Basic And Diluted NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted	63082000
CY2018	jbgs	Net Income Loss Available To Common Stockholders Basic And Diluted NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted	37325000
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	133451000
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	130687000
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	119176000
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.49
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.48
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.31
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-43900000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-17700000
CY2020	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	-17500000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10200000
CY2019	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	10200000
CY2019	jbgs	Operating And Finance Lease Fixed Lease Cost OperatingAndFinanceLeaseFixedLeaseCost	2300000
CY2018	jbgs	Third Party Real Estate Services Revenue Less Expenses ThirdPartyRealEstateServicesRevenueLessExpenses	8873000
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	1600000
CY2020	jbgs	Third Party Real Estate Services Revenue Less Expenses ThirdPartyRealEstateServicesRevenueLessExpenses	-890000
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	1300000
CY2019	jbgs	Third Party Real Estate Services Revenue Less Expenses ThirdPartyRealEstateServicesRevenueLessExpenses	7391000
CY2020	jbgs	Reimbursement Revenuefrom Third Parties ReimbursementRevenuefromThirdParties	56659000
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3
CY2020	jbgs	Revenuefrom Contractwith Customer Excluding Reimbursements RevenuefromContractwithCustomerExcludingReimbursements	57280000
CY2019	jbgs	Revenuefrom Contractwith Customer Excluding Reimbursements RevenuefromContractwithCustomerExcludingReimbursements	65452000
CY2018	jbgs	Revenuefrom Contractwith Customer Excluding Reimbursements RevenuefromContractwithCustomerExcludingReimbursements	59684000
CY2019	jbgs	Reimbursement Revenuefrom Third Parties ReimbursementRevenuefromThirdParties	55434000
CY2018	jbgs	Reimbursement Revenuefrom Third Parties ReimbursementRevenuefromThirdParties	39015000
CY2020	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	113939000
CY2019	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	120886000
CY2018	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	98699000
CY2020	jbgs	Third Party Real Estate Services Expenses ThirdPartyRealEstateServicesExpenses	114829000
CY2019	jbgs	Third Party Real Estate Services Expenses ThirdPartyRealEstateServicesExpenses	113495000
CY2018	jbgs	Third Party Real Estate Services Expenses ThirdPartyRealEstateServicesExpenses	89826000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-62303000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	65571000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	39924000
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	221756000
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	191580000
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	211436000
CY2020	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	46634000
CY2019	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	46822000
CY2018	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	33728000
CY2020	jbgs	Third Party Real Estate Services ThirdPartyRealEstateServices	114829000
CY2019	jbgs	Third Party Real Estate Services ThirdPartyRealEstateServices	113495000
CY2018	jbgs	Third Party Real Estate Services ThirdPartyRealEstateServices	89826000
CY2020	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	31678000
CY2019	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	42162000
CY2018	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	36030000
CY2020	jbgs	Transactionandothercosts Transactionandothercosts	8670000
CY2019	jbgs	Transactionandothercosts Transactionandothercosts	23235000
CY2018	jbgs	Transactionandothercosts Transactionandothercosts	27706000
CY2020	us-gaap	Interest Expense InterestExpense	62321000
CY2019	us-gaap	Interest Expense InterestExpense	52695000
CY2018	us-gaap	Interest Expense InterestExpense	74447000
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-62000
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5805000
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5153000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10232000
CY2018	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	7606000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4265000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1302000
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	5385000
CY2020	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	113939000
CY2019	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	120886000
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	15168000
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-4958000
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	8573000
CY2018	jbgs	Revenuefrom Contractwith Customer Including Reimbursements RevenuefromContractwithCustomerIncludingReimbursements	98699000
CY2020	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	15372000
CY2019	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	7638000
CY2018	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	6358000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-20336000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1395000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	39409000
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	-625000
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	59477000
CY2019	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	104991000
CY2018	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	52183000
CY2018	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-21000
CY2020	jbgs	Consolidated Noi ConsolidatedNOI	256829000
CY2019	jbgs	Consolidated Noi ConsolidatedNOI	311131000
CY2018	jbgs	Consolidated Noi ConsolidatedNOI	319990000
CY2020	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	458958000
CY2020	us-gaap	Other Operating Income OtherOperatingIncome	14454000
CY2020	jbgs	Rental Revenue RentalRevenue	473412000
CY2020	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	145625000
CY2020	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	70958000
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	216583000
CY2020	jbgs	Consolidated Noi ConsolidatedNOI	256829000
CY2019	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	493273000
CY2019	us-gaap	Other Operating Income OtherOperatingIncome	25973000
CY2019	jbgs	Rental Revenue RentalRevenue	519246000
CY2019	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	137622000
CY2019	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	70493000
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	208115000
CY2019	jbgs	Consolidated Noi ConsolidatedNOI	311131000
CY2018	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	513447000
CY2018	us-gaap	Other Operating Income OtherOperatingIncome	25678000
CY2018	jbgs	Rental Revenue RentalRevenue	539125000
CY2018	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	148081000
CY2018	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	71054000
CY2018	us-gaap	Operating Lease Expense OperatingLeaseExpense	219135000
CY2018	jbgs	Consolidated Noi ConsolidatedNOI	319990000
CY2020Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	6000631000
CY2020Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	461369000
CY2020Q4	us-gaap	Assets Assets	6079547000
CY2019Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	5775519000
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	9360000
CY2019Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.25
CY2019Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	543026000
CY2019Q4	us-gaap	Assets Assets	5986251000
CY2020	jbgs	General Liability Insurance Coverage Limit Per Occurrence GeneralLiabilityInsuranceCoverageLimitPerOccurrence	150000000.0
CY2020	jbgs	Propertyand Rental Value Insurance Coverage Limit PropertyandRentalValueInsuranceCoverageLimit	1500000000
CY2020	jbgs	Terrorist Acts Insurance Coverage Limit Per Occurrence TerroristActsInsuranceCoverageLimitPerOccurrence	2000000000.0
CY2020Q4	us-gaap	Purchase Obligation PurchaseObligation	18900000
CY2020Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	18200000
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17900000
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.054
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.042
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y10M24D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P98Y
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2550000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1020000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2266000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1040000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1202000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1061000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1263000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1082000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1327000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1104000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	6259000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	298822000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	14867000
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	304129000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	4115000
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	263908000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10752000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	40221000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	10800000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	40200000
CY2020	jbgs	Tenant Related Obligations TenantRelatedObligations	56100000
CY2020Q1	us-gaap	Revenues Revenues	158107000
CY2020Q2	us-gaap	Revenues Revenues	144952000
CY2020Q3	us-gaap	Revenues Revenues	151035000
CY2020Q4	us-gaap	Revenues Revenues	148629000
CY2020Q1	us-gaap	Profit Loss ProfitLoss	48175000
CY2020Q2	us-gaap	Profit Loss ProfitLoss	-40263000
CY2020Q3	us-gaap	Profit Loss ProfitLoss	-25005000
CY2020Q4	us-gaap	Profit Loss ProfitLoss	-50168000
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	42925000
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-36780000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-22793000
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	-45655000
CY2020Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.32
CY2020Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.28
CY2020Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.18
CY2020Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.36
CY2020Q4	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10200000
CY2020Q4	jbgs	Deferred Straight Line Rent Receivables Reserve DeferredStraightLineRentReceivablesReserve	15000000.0
CY2020Q4	jbgs	Lease Income Guarantee LeaseIncomeGuarantee	8200000
CY2019Q1	us-gaap	Revenues Revenues	155199000
CY2019Q2	us-gaap	Revenues Revenues	160617000
CY2019Q3	us-gaap	Revenues Revenues	167077000
CY2019Q4	us-gaap	Revenues Revenues	164877000
CY2019Q1	us-gaap	Profit Loss ProfitLoss	28248000
CY2019Q2	us-gaap	Profit Loss ProfitLoss	-3328000
CY2019Q3	us-gaap	Profit Loss ProfitLoss	10532000
CY2019Q4	us-gaap	Profit Loss ProfitLoss	38692000
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	24861000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	34390000
CY2019Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.20
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-3040000
CY2019Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.03
CY2019Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.06
CY2019Q4	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10200000
CY2020Q4	srt	Real Estate And Accumulated Depreciation Amount Of Encumbrances RealEstateAndAccumulatedDepreciationAmountOfEncumbrances	2003869000
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	1413597000
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Buildings And Improvements RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements	2498457000
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	2162462000
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	1453442000
CY2020Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements	4621074000
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	6074516000
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1232699000
CY2020	us-gaap	Real Estate And Accumulated Depreciation Life Used For Depreciation1 RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1	P40Y
CY2020Q4	jbgs	Sec Schedule1228 Real Estate Companies Investmentin Real Estate Federal Income Tax Basis Difference SECSchedule1228RealEstateCompaniesInvestmentinRealEstateFederalIncomeTaxBasisDifference	168000000.0
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	5943970000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	5895953000
CY2017Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	6025797000
CY2020	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	65270000
CY2019	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	164320000
CY2018	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	38369000
CY2020	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	252306000
CY2019	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	469450000
CY2018	us-gaap	Real Estate Other Additions RealEstateOtherAdditions	358976000
CY2020	us-gaap	Sec Schedule Iii Real Estate Writedown Or Reserve Amount SECScheduleIIIRealEstateWritedownOrReserveAmount	152000000
CY2019	us-gaap	Sec Schedule Iii Real Estate Writedown Or Reserve Amount SECScheduleIIIRealEstateWritedownOrReserveAmount	585753000
CY2018	us-gaap	Sec Schedule Iii Real Estate Writedown Or Reserve Amount SECScheduleIIIRealEstateWritedownOrReserveAmount	527189000
CY2020	jbgs	Real Estate Impaired RealEstateImpaired	35030000
CY2020Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	6074516000
CY2019Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	5943970000
CY2018Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	5895953000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1119612000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1086844000
CY2017Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1011330000
CY2020	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	194190000
CY2019	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	161937000
CY2018	us-gaap	Sec Schedule Iii Real Estate Accumulated Depreciation Depreciation Expense SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense	151346000
CY2020	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	53878000
CY2019	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	129169000
CY2018	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	75832000
CY2020	jbgs	Real Estate Accumulateddepreciation Real Estate Impaired RealEstateAccumulateddepreciationRealEstateImpaired	27225000
CY2020Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1232699000
CY2019Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1119612000
CY2018Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	1086844000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	10200000
CY2020	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	7800000
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	2400000

Files In Submission

Name	View Source	Status
0001558370-21-001480-index-headers.html	Edgar Link	pending
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$JBGS
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2020 Q4 Form 10-K Financial Statement

#000155837021001480 Filed on February 23, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JBGS JBG SMITH Properties Stock $jbgs

2020 Q4 Form 10-K Financial Statement

#000155837021001480 Filed on February 23, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JBGS
JBG SMITH Properties Stock $jbgs