$JBGS
JBG SMITH Properties Stock $jbgs

$jbgs Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-Q Financial Statement

#000168979619000027 Filed on November 05, 2019

Income Statement

Concept	2019 Q4	2019 Q3	2018 Q3
Revenue	$164.9M	$167.1M	$158.4M
YoY Change	0.99%	5.45%	4.0%
Cost Of Revenue	$82.70M	$82.30M	$71.80M
YoY Change	-12.86%	14.62%	5.59%
Gross Profit	$82.20M	$84.70M	$86.60M
YoY Change	20.35%	-2.19%	2.73%
Gross Profit Margin	49.86%	50.7%	54.66%
Selling, General & Admin	$23.90M	$20.60M	$20.80M
YoY Change	162.64%	-0.96%	-16.8%
% of Gross Profit	29.08%	24.32%	24.02%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$50.90M	$47.80M	$47.70M
YoY Change	-25.91%	0.21%	5.76%
% of Gross Profit	61.92%	56.43%	55.08%
Operating Expenses	$73.90M	$151.8M	$143.4M
YoY Change	1.65%	5.91%	-40.54%
Operating Profit	$8.300M	-$67.13M	$15.09M
YoY Change	-288.64%	-545.01%	-117.0%
Interest Expense	-$8.800M	$10.58M	$18.98M
YoY Change	7.32%	-44.24%	23.97%
% of Operating Profit	-106.02%		125.81%
Other Income/Expense, Net		-$4.279M	$10.46M
YoY Change		-140.93%
Pretax Income	$38.10M	$10.96M	$25.54M
YoY Change	2141.18%	-57.07%	-132.32%
Income Tax	-$600.0K	$432.0K	-$841.0K
% Of Pretax Income	-1.57%	3.94%	-3.29%
Net Earnings	$34.39M	$9.360M	$22.83M
YoY Change	4812.86%	-59.0%	-132.69%
Net Earnings / Revenue	20.86%	5.6%	14.41%
Basic Earnings Per Share	$0.25	$0.06	$0.19
Diluted Earnings Per Share	$0.25	$0.06	$0.19
COMMON SHARES
Basic Shares Outstanding	134.1M shares	134.1M	119.8M shares
Diluted Shares Outstanding		134.1M	119.8M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$126.4M	$230.1M	$253.1M
YoY Change	-51.5%	-9.09%	-31.2%
Cash & Equivalents	$126.4M	$230.1M	$253.1M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$222.7M	$226.4M	$177.6M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$349.1M	$456.5M	$430.7M
YoY Change	-22.53%	5.99%	-23.65%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.676B	$4.793B	$4.673B
YoY Change	-1.37%	2.56%	-3.85%
Goodwill
YoY Change
Intangibles	$55.17M		$94.22M
YoY Change	-38.6%		-34.11%
Long-Term Investments	$543.0M	$320.9M	$361.0M
YoY Change	68.16%	-11.11%	26.67%
Other Assets	$313.6M	$329.4M	$387.6M
YoY Change	-11.01%	-15.02%	224.35%
Total Long-Term Assets	$5.637B	$5.566B	$5.580B
YoY Change	1.63%	-0.26%	2.38%
TOTAL ASSETS
Total Short-Term Assets	$349.1M	$456.5M	$430.7M
Total Long-Term Assets	$5.637B	$5.566B	$5.580B
Total Assets	$5.986B	$6.022B	$6.011B
YoY Change	-0.18%	0.18%	-0.06%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$157.7M	$160.0M	$147.2M
YoY Change	20.38%	8.7%	11.85%
Accrued Expenses	$28.50M	$34.50M
YoY Change
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	$236.6M	$211.1M	$160.2M
YoY Change	22.02%	31.77%	10.18%
LONG-TERM LIABILITIES
Long-Term Debt	$1.623B	$1.671B	$2.083B
YoY Change	-24.55%	-19.75%	-2.67%
Other Long-Term Liabilities	$121.7M	$132.8M	$130.0M
YoY Change	21.82%	2.15%	49.43%
Total Long-Term Liabilities	$1.745B	$1.804B	$2.213B
YoY Change	-22.49%	-18.47%	-0.63%
TOTAL LIABILITIES
Total Short-Term Liabilities	$236.6M	$211.1M	$160.2M
Total Long-Term Liabilities	$1.745B	$1.804B	$2.213B
Total Liabilities	$1.987B	$2.021B	$2.379B
YoY Change	-18.96%	-15.04%	0.3%
SHAREHOLDERS EQUITY
Retained Earnings	-$231.2M	-$205.2M	-$110.2M
YoY Change	31.33%	86.17%	282.35%
Common Stock	$1.342M	$1.342M	$1.210M
YoY Change	10.91%	10.91%	2.54%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$3.386B	$3.414B	$3.066B
YoY Change
Total Liabilities & Shareholders Equity	$5.986B	$6.022B	$6.011B
YoY Change	-0.18%	0.18%	-0.06%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	$34.39M	$9.360M	$22.83M
YoY Change	4812.86%	-59.0%	-132.69%
Depreciation, Depletion And Amortization	$50.90M	$47.80M	$47.70M
YoY Change	-25.91%	0.21%	5.76%
Cash From Operating Activities	$61.40M	$59.80M	$43.20M
YoY Change	19.22%	38.43%	-187.63%
INVESTING ACTIVITIES
Capital Expenditures	-$302.7M	-$114.0M	-$94.70M
YoY Change	103.43%	20.38%	54.74%
Acquisitions
YoY Change
Other Investing Activities	$207.6M	$37.20M	$132.3M
YoY Change	64.5%	-71.88%	-39.81%
Cash From Investing Activities	-$95.30M	-$76.70M	$37.60M
YoY Change	321.68%	-303.99%	-76.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-67.30M	-36.20M	37.80M
YoY Change	601.04%	-195.77%	-555.42%
NET CHANGE
Cash From Operating Activities	61.40M	59.80M	43.20M
Cash From Investing Activities	-95.30M	-76.70M	37.60M
Cash From Financing Activities	-67.30M	-36.20M	37.80M
Net Change In Cash	-101.2M	-53.10M	118.6M
YoY Change	-624.35%	-144.77%	17.43%
FREE CASH FLOW
Cash From Operating Activities	$61.40M	$59.80M	$43.20M
Capital Expenditures	-$302.7M	-$114.0M	-$94.70M
Free Cash Flow	$364.1M	$173.8M	$137.9M
YoY Change	81.78%	26.03%	1058.82%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-35967000	USD
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0001689796
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17900000	USD
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4700000	shares
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.225
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.225
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.45
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	120937000	shares
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	134127000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	120937000	shares
CY2019Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	134127000	shares
CY2019Q3	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2019Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-37994
	dei	Entity Registrant Name EntityRegistrantName	JBG SMITH PROPERTIES
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	81-4307010
	dei	Entity Address Address Line1 EntityAddressAddressLine1	4445 Willard Avenue
	dei	Entity Address City Or Town EntityAddressCityOrTown	Chevy Chase
	dei	Entity Address State Or Province EntityAddressStateOrProvince	MD
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	20815
	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 400
	dei	City Area Code CityAreaCode	240
	dei	Local Phone Number LocalPhoneNumber	333-3600
	dei	Security12b Title Security12bTitle	Common Shares, par value $0.01 per share
	dei	Trading Symbol TradingSymbol	JBGS
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2019Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	134127004	shares
CY2019Q3	us-gaap	Land And Land Improvements LandAndLandImprovements	1283043000	USD
CY2018Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	1371874000	USD
CY2019Q3	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	3824467000	USD
CY2018Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	3722930000	USD
CY2019Q3	us-gaap	Development In Process DevelopmentInProcess	763080000	USD
CY2018Q4	us-gaap	Development In Process DevelopmentInProcess	697930000	USD
CY2019Q3	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	5870590000	USD
CY2018Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	5792734000	USD
CY2019Q3	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1109897000	USD
CY2018Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	1051875000	USD
CY2019Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	4760693000	USD
CY2018Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	4740859000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	230147000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	260553000	USD
CY2019Q3	us-gaap	Restricted Cash RestrictedCash	13573000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	138979000	USD
CY2019Q3	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	53965000	USD
CY2018Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	46568000	USD
CY2019Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	172386000	USD
CY2018Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	143473000	USD
CY2019Q3	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	320920000	USD
CY2018Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	322878000	USD
CY2019Q3	us-gaap	Other Assets OtherAssets	301760000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	264994000	USD
CY2019Q3	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	168820000	USD
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CY2019Q3	us-gaap	Secured Debt SecuredDebt	1358571000	USD
CY2018Q4	us-gaap	Secured Debt SecuredDebt	1838381000	USD
CY2019Q3	us-gaap	Unsecured Debt UnsecuredDebt	297124000	USD
CY2018Q4	us-gaap	Unsecured Debt UnsecuredDebt	297129000	USD
CY2019Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	160031000	USD
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CY2019Q3	us-gaap	Other Liabilities OtherLiabilities	205705000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	181606000	USD
CY2019Q3	jbgs	Liabilitiesrelatedtoassetsheldforsale Liabilitiesrelatedtoassetsheldforsale	66000	USD
CY2018Q4	jbgs	Liabilitiesrelatedtoassetsheldforsale Liabilitiesrelatedtoassetsheldforsale	3717000	USD
CY2019Q3	us-gaap	Liabilities Liabilities	2021497000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	2451793000	USD
CY2019Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	586532000	USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	558140000	USD
CY2019Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q3	us-gaap	Common Stock Value CommonStockValue	1342000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	1210000	USD
CY2019Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3643333000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	3155256000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-205192000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-176018000	USD
CY2019Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-25578000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	6700000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	3413905000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	2987148000	USD
CY2019Q3	us-gaap	Minority Interest MinorityInterest	330000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	204000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3414235000	USD
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CY2019Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	123963000	USD
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	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	365702000	USD
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CY2019Q3	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	34587000	USD
CY2018Q3	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	23788000	USD
	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	91765000	USD
	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	72278000	USD
CY2019Q3	us-gaap	Other Income OtherIncome	8527000	USD
CY2018Q3	us-gaap	Other Income OtherIncome	8075000	USD
	us-gaap	Other Income OtherIncome	25426000	USD
	us-gaap	Other Income OtherIncome	24250000	USD
CY2019Q3	us-gaap	Revenues Revenues	167077000	USD
CY2018Q3	us-gaap	Revenues Revenues	158443000	USD
	us-gaap	Revenues Revenues	482893000	USD
	us-gaap	Revenues Revenues	480927000	USD
CY2019Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	46862000	USD
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	us-gaap	Depreciation And Amortization DepreciationAndAmortization	141576000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	143880000	USD
CY2019Q3	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	35800000	USD
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	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	100087000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	108003000	USD
CY2019Q3	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	16740000	USD
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	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	52241000	USD
	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	54024000	USD
CY2019Q3	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	11015000	USD
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	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	34888000	USD
	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	25218000	USD
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	us-gaap	Management Fee Expense ManagementFeeExpense	86585000	USD
	us-gaap	Management Fee Expense ManagementFeeExpense	64552000	USD
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	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	26912000	USD
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	us-gaap	Operating Expenses OperatingExpenses	455508000	USD
	us-gaap	Operating Expenses OperatingExpenses	434723000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1144000	USD
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	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	647000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15418000	USD
CY2019Q3	us-gaap	Investment Income Net InvestmentIncomeNet	-640000	USD
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	us-gaap	Investment Income Net InvestmentIncomeNet	2363000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	5177000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	10583000	USD
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	us-gaap	Interest Expense InterestExpense	40864000	USD
	us-gaap	Interest Expense InterestExpense	56263000	USD
CY2019Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	8088000	USD
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	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	47121000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	45789000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
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	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1889000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4536000	USD
CY2019Q3	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
CY2018Q3	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	-7606000	USD
CY2019Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-4279000	USD
CY2018Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	10455000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	7378000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2021000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10964000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25541000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	34763000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	44183000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	432000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-841000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-689000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1436000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	10532000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	26382000	USD
	us-gaap	Profit Loss ProfitLoss	35452000	USD
	us-gaap	Profit Loss ProfitLoss	45619000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1172000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	3552000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4271000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6532000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-127000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	9360000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	22830000	USD
	us-gaap	Net Income Loss NetIncomeLoss	31181000	USD
	us-gaap	Net Income Loss NetIncomeLoss	39214000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	134127000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	119835000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	129527000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	118588000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	134127000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	119835000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	129527000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118588000	shares
CY2019Q3	us-gaap	Profit Loss ProfitLoss	10532000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	26382000	USD
	us-gaap	Profit Loss ProfitLoss	35452000	USD
	us-gaap	Profit Loss ProfitLoss	45619000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-7014000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	5142000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-33966000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	24453000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	211000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-24000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	2001000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-1473000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7225000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5166000	USD
CY2019Q3	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	803000	USD
CY2018Q3	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	-696000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	25926000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	3307000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	31548000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-515000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	71545000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1172000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	3552000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4271000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6532000	USD
	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	3689000	USD
	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Redeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToRedeemableNoncontrollingInterest	-3406000	USD
CY2019Q3	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Nonredeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToNonredeemableNoncontrollingInterest	0	USD
CY2018Q3	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Nonredeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToNonredeemableNoncontrollingInterest	0	USD
	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Nonredeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToNonredeemableNoncontrollingInterest	0	USD
	jbgs	Comprehensive Income Loss Net Of Tax Attributable To Nonredeemable Noncontrolling Interest ComprehensiveIncomeLossNetOfTaxAttributableToNonredeemableNoncontrollingInterest	127000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2938000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	27300000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1097000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	61734000	USD
CY2019Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3442858000	USD
CY2019Q3	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	9360000	USD
CY2019Q3	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	0	shares
CY2019Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	80000	USD
CY2019Q3	us-gaap	Dividends Dividends	30179000	USD
CY2019Q3	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	16000	USD
CY2019Q3	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-643000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7225000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3414235000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2953666000	USD
CY2018Q3	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	22830000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	109122000	USD
CY2018Q3	us-gaap	Dividends Dividends	27087000	USD
CY2018Q3	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	327000	USD
CY2018Q3	jbgs	Noncontrolling Interest Contributions NoncontrollingInterestContributions	250000	USD
CY2018Q3	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	5841000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	5166000	USD
CY2018Q3	us-gaap	Stockholders Equity Other StockholdersEquityOther	-76000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3069537000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2987352000	USD
	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	31181000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	472780000	USD
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	57318000	USD
	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	26000	shares
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1018000	USD
	us-gaap	Dividends Dividends	60355000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	47000	USD
	jbgs	Noncontrolling Interest Contributions NoncontrollingInterestContributions	173000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-39218000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-35967000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3414235000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2974814000	USD
	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	39087000	USD
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	109122000	USD
	us-gaap	Dividends Dividends	53624000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	814000	USD
	jbgs	Noncontrolling Interest Contributions NoncontrollingInterestContributions	250000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-24752000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	25926000	USD
	us-gaap	Stockholders Equity Other StockholdersEquityOther	472000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3069537000	USD
	us-gaap	Profit Loss ProfitLoss	35452000	USD
	us-gaap	Profit Loss ProfitLoss	45619000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	47432000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	39690000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	144868000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	146958000	USD
	us-gaap	Straight Line Rent StraightLineRent	29164000	USD
	us-gaap	Straight Line Rent StraightLineRent	7880000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	647000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15418000	USD
	jbgs	Amortization Of Acquired Below Market Lease Net Of Acquired Above Market Lease AmortizationOfAcquiredBelowMarketLeaseNetOfAcquiredAboveMarketLease	486000	USD
	jbgs	Amortization Of Acquired Below Market Lease Net Of Acquired Above Market Lease AmortizationOfAcquiredBelowMarketLeaseNetOfAcquiredAboveMarketLease	58000	USD
	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	4344000	USD
	us-gaap	Amortization Of Lease Incentives AmortizationOfLeaseIncentives	3646000	USD
	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	-7606000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1889000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4536000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	47121000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	45789000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-50000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	1264000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1281000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2591000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1836000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	6820000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-20000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1499000	USD
	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	9077000	USD
	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	-2167000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	13858000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	18637000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-17171000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-23875000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-7009000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-11550000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	112639000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	136661000	USD
	us-gaap	Payments To Acquire And Develop Real Estate PaymentsToAcquireAndDevelopRealEstate	294355000	USD
	us-gaap	Payments To Acquire And Develop Real Estate PaymentsToAcquireAndDevelopRealEstate	260396000	USD
	us-gaap	Payments For Deposits On Real Estate Acquisitions PaymentsForDepositsOnRealEstateAcquisitions	9125000	USD
	us-gaap	Payments For Deposits On Real Estate Acquisitions PaymentsForDepositsOnRealEstateAcquisitions	0	USD
	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	157810000	USD
	us-gaap	Proceeds From Sale Of Real Estate ProceedsFromSaleOfRealEstate	346149000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	386000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	7557000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	2240000	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	0	USD
	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	24602000	USD
	us-gaap	Payments To Acquire Real Estate And Real Estate Joint Ventures PaymentsToAcquireRealEstateAndRealEstateJointVentures	7325000	USD
	us-gaap	Payments To Acquire Real Estate And Real Estate Joint Ventures PaymentsToAcquireRealEstateAndRealEstateJointVentures	22663000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	665000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-145438000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	88881000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	103000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	82000	USD
	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	0	USD
	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	43823000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	35000000	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	0	USD
	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	250000000	USD
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	482810000	USD
	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	267285000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	150751000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	515000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	372000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	473527000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	99654000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	80166000	USD
	us-gaap	Payments For Proceeds From Other Real Estate Partnerships PaymentsForProceedsFromOtherRealEstatePartnerships	0	USD
	us-gaap	Payments For Proceeds From Other Real Estate Partnerships PaymentsForProceedsFromOtherRealEstatePartnerships	548000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	13564000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	13320000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	125000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	250000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	19000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	439000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-123013000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-183890000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-155812000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	41652000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	399532000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	338557000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	243720000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	380209000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	230147000	USD
CY2018Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	253148000	USD
CY2019Q3	us-gaap	Restricted Cash RestrictedCash	13573000	USD
CY2018Q3	us-gaap	Restricted Cash RestrictedCash	127061000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	243720000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	380209000	USD
	us-gaap	Interest Paid Net InterestPaidNet	38563000	USD
	us-gaap	Interest Paid Net InterestPaidNet	48835000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	99876000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	78910000	USD
	jbgs	Write Off Of Fully Depreciated Assets Including Asset Impairment WriteOffOfFullyDepreciatedAssetsIncludingAssetImpairment	49319000	USD
	jbgs	Write Off Of Fully Depreciated Assets Including Asset Impairment WriteOffOfFullyDepreciatedAssetsIncludingAssetImpairment	23049000	USD
	jbgs	Investmentsin Joint Ventures InvestmentsinJointVentures	0	USD
	jbgs	Investmentsin Joint Ventures InvestmentsinJointVentures	95923000	USD
	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	-57318000	USD
	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	-109208000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	35318000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
	jbgs	Operating Lease Liability Obtainedin Exchangefor Rightof Use Asset OperatingLeaseLiabilityObtainedinExchangeforRightofUseAsset	37922000	USD
	jbgs	Operating Lease Liability Obtainedin Exchangefor Rightof Use Asset OperatingLeaseLiabilityObtainedinExchangeforRightofUseAsset	0	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	4629000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2019Q3	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	61
	us-gaap	Basis Of Accounting BasisOfAccounting	<div style="line-height:120%;padding-top:16px;text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;">Basis of Presentation</span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The accompanying unaudited condensed consolidated financial statements and notes are prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions of Form 10-Q and Article 10 of Regulation S-X. Accordingly, these unaudited condensed consolidated financial statements do not contain certain information required in annual financial statements and notes as required under GAAP. In our opinion, all adjustments considered necessary for a fair presentation have been included, and all such adjustments are of a normal recurring nature. All intercompany transactions and balances have been eliminated. The results of operations for the </span><span style="font-family:inherit;font-size:10pt;">three and nine months ended</span><span style="font-family:inherit;font-size:10pt;"> </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;"> are not necessarily indicative of the results that may be expected for a full year. These condensed consolidated financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended </span><span style="font-family:inherit;font-size:10pt;">December 31, 2018</span><span style="font-family:inherit;font-size:10pt;">, filed with the Securities and Exchange Commission.</span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The accompanying condensed consolidated financial statements include the accounts of JBG SMITH and our wholly owned subsidiaries and those other entities, including JBG SMITH LP, in which we have a controlling financial interest, including where we have been determined to be the primary beneficiary of a variable interest entity ("VIE"). See Note 5 for additional information on our VIEs. The portions of the equity and net income of consolidated subsidiaries that are not attributable to JBG SMITH are presented separately as amounts attributable to noncontrolling interests in our condensed consolidated financial statements. </span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">References to the financial statements refer to our condensed consolidated financial statements as of </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">December 31, 2018</span><span style="font-family:inherit;font-size:10pt;">, and for the </span><span style="font-family:inherit;font-size:10pt;">three and nine months ended</span><span style="font-family:inherit;font-size:10pt;"> </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;">. References to the balance sheets refer to our condensed consolidated balance sheets as of </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">December 31, 2018</span><span style="font-family:inherit;font-size:10pt;">. References to the statements of operations refer to our condensed consolidated statements of operations for the </span><span style="font-family:inherit;font-size:10pt;">three and nine months ended</span><span style="font-family:inherit;font-size:10pt;"> </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;">. References to the statements of comprehensive income (loss) refer to our condensed consolidated statements of </span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">comprehensive income (loss) for the </span><span style="font-family:inherit;font-size:10pt;">three and nine months ended</span><span style="font-family:inherit;font-size:10pt;"> </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;">. References to the statements of cash flows refer to our condensed consolidated statements of cash flows for the </span><span style="font-family:inherit;font-size:10pt;">nine months ended</span><span style="font-family:inherit;font-size:10pt;"> </span><span style="font-family:inherit;font-size:10pt;">September 30, 2019</span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;">2018</span><span style="font-family:inherit;font-size:10pt;">.</span></div>
	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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 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 used in assessing impairment and (ii) the determination of useful lives for tangible and intangible assets. Actual results could differ from these estimates.</span></div>
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	35300000	USD
CY2019Q1	us-gaap	Deferred Rent Credit DeferredRentCredit	3500000	USD
CY2019Q1	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	767000	USD
CY2019Q1	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	140000	USD
CY2018Q3	jbgs	Deferred Costs Internal Leasing Net DeferredCostsInternalLeasingNet	1500000	USD
	jbgs	Deferred Costs Internal Leasing Net DeferredCostsInternalLeasingNet	4300000	USD
CY2019Q3	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	114538000	USD
	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	342268000	USD
CY2019Q3	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	9425000	USD
	us-gaap	Operating Lease Variable Lease Income OperatingLeaseVariableLeaseIncome	23434000	USD
CY2019Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	123963000	USD
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	365702000	USD
CY2019Q3	us-gaap	Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear	101929000	USD
CY2019Q3	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	367750000	USD
CY2019Q3	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	307251000	USD
CY2019Q3	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	273711000	USD
CY2019Q3	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	235298000	USD
CY2019Q3	jbgs	Lessor Operating Lease Paymentstobe Received Six Years LessorOperatingLeasePaymentstobeReceivedSixYears	208243000	USD
CY2019Q3	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	1109914000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	377427000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	321205000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	287463000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	256352000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	215203000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	1188767000	USD
CY2017Q4	us-gaap	Ground Leases Net GroundLeasesNet	16000000.0	USD
CY2019Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.053
CY2019Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.058
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P20Y8M12D
CY2019Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M18D
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	1573000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Remainder Of Fiscal Year FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear	266000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	6272000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1073000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	6201000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1095000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5257000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1117000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2000000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1139000	USD
CY2019Q3	jbgs	Lessee Operating Lease Liability Payments Due Year Six LesseeOperatingLeaseLiabilityPaymentsDueYearSix	2061000	USD
CY2019Q3	jbgs	Finance Lease Liability Payments Due Year Six FinanceLeaseLiabilityPaymentsDueYearSix	1162000	USD
CY2019Q3	jbgs	Lessee Operating Lease Liability Payments Due Thereafter LesseeOperatingLeaseLiabilityPaymentsDueThereafter	36579000	USD
CY2019Q3	jbgs	Finance Lease Liability Payments Due Thereafter FinanceLeaseLiabilityPaymentsDueThereafter	15977000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	59943000	USD
CY2019Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	21829000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	25403000	USD
CY2019Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	6228000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	34540000	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	15601000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments Duein Next Twelve Months OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPaymentsDueinNextTwelveMonths	13991000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments Duein Two Years OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPaymentsDueinTwoYears	13710000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments Duein Three Years OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPaymentsDueinThreeYears	13395000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments Duein Four Years OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPaymentsDueinFourYears	12554000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments Duein Five Years OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPaymentsDueinFiveYears	9489000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments Due After Five Years OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPaymentsDueAfterFiveYears	55780000	USD
CY2018Q4	jbgs	Operatingand Capital Leases And Lease Assumption Liabilities Future Minimum Payments OperatingandCapitalLeasesAndLeaseAssumptionLiabilitiesFutureMinimumPayments	118919000	USD
CY2019Q3	jbgs	Fixed Operatingand Finance Lease Cost FixedOperatingandFinanceLeaseCost	662000	USD
	jbgs	Fixed Operatingand Finance Lease Cost FixedOperatingandFinanceLeaseCost	1900000	USD
CY2019Q3	us-gaap	Variable Lease Cost VariableLeaseCost	437000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	1300000	USD
	jbgs	Grossproceedsfromsaleofrealestate Grossproceedsfromsaleofrealestate	157950000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	157810000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	47121000	USD
CY2019Q3	us-gaap	Assets Held For Sale Not Part Of Disposal Group AssetsHeldForSaleNotPartOfDisposalGroup	168820000	USD
CY2019Q3	jbgs	Liabilitiesrelatedtoassetsheldforsale Liabilitiesrelatedtoassetsheldforsale	66000	USD
CY2019Q3	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	320920000	USD
CY2018Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	322878000	USD
CY2019Q3	jbgs	Equity Method Investment Long Term Debt Percentage Bearing Variable Interest Percentage Rate EquityMethodInvestmentLongTermDebtPercentageBearingVariableInterestPercentageRate	0.0465
CY2019Q3	jbgs	Equity Method Investment Long Term Debt Bearing Variable Amount EquityMethodInvestmentLongTermDebtBearingVariableAmount	627787000	USD
CY2018Q4	jbgs	Equity Method Investment Long Term Debt Bearing Variable Amount EquityMethodInvestmentLongTermDebtBearingVariableAmount	461704000	USD
CY2019Q3	jbgs	Equity Method Investment Long Term Debt Percentage Bearing Fixed Interest Percentage Rate EquityMethodInvestmentLongTermDebtPercentageBearingFixedInterestPercentageRate	0.0397
CY2019Q3	jbgs	Equity Method Investment Long Term Debt Bearing Fixed Amount EquityMethodInvestmentLongTermDebtBearingFixedAmount	548591000	USD
CY2018Q4	jbgs	Equity Method Investment Long Term Debt Bearing Fixed Amount EquityMethodInvestmentLongTermDebtBearingFixedAmount	665662000	USD
CY2018Q4	jbgs	Equity Method Investment Unamortized Deferred Financing Costs EquityMethodInvestmentUnamortizedDeferredFinancingCosts	1998000	USD
CY2019Q3	jbgs	Equity Method Investment Long Term Debt EquityMethodInvestmentLongTermDebt	1176378000	USD
CY2018Q4	jbgs	Equity Method Investment Long Term Debt EquityMethodInvestmentLongTermDebt	1127366000	USD
CY2019Q3	jbgs	Equity Method Investment Unamortized Deferred Financing Costs EquityMethodInvestmentUnamortizedDeferredFinancingCosts	1905000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilities	1220213000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	997401000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity Or Capital EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital	1000036000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	2310611000	USD
CY2019Q3	jbgs	Equity Method Investment Long Term Debt Net EquityMethodInvestmentLongTermDebtNet	1174473000	USD
CY2018Q4	jbgs	Equity Method Investment Long Term Debt Net EquityMethodInvestmentLongTermDebtNet	1125368000	USD
CY2019Q3	jbgs	Equity Method Investment Summarized Financial Information Assets Real Estate Investment Property Net EquityMethodInvestmentSummarizedFinancialInformationAssetsRealEstateInvestmentPropertyNet	2118483000	USD
CY2018Q4	jbgs	Equity Method Investment Summarized Financial Information Assets Real Estate Investment Property Net EquityMethodInvestmentSummarizedFinancialInformationAssetsRealEstateInvestmentPropertyNet	2050985000	USD
CY2019Q3	jbgs	Equity Method Investment Summarized Financial Information Assets Other EquityMethodInvestmentSummarizedFinancialInformationAssetsOther	192128000	USD
CY2018Q4	jbgs	Equity Method Investment Summarized Financial Information Assets Other EquityMethodInvestmentSummarizedFinancialInformationAssetsOther	169264000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	2310611000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	2220249000	USD
CY2019Q3	jbgs	Equity Method Investment Summarized Financial Information Liabilities Secured Debt EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesSecuredDebt	1174473000	USD
CY2018Q4	jbgs	Equity Method Investment Summarized Financial Information Liabilities Secured Debt EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesSecuredDebt	1125368000	USD
CY2019Q3	jbgs	Equity Method Investment Summarized Financial Information Liabilities Other EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOther	138737000	USD
CY2018Q4	jbgs	Equity Method Investment Summarized Financial Information Liabilities Other EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOther	94845000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilities	1313210000	USD
CY2018Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	2220249000	USD
CY2019Q1	jbgs	Equity Method Investment Summarized Financial Information Assets Operating Leases Rightof Use Assets EquityMethodInvestmentSummarizedFinancialInformationAssetsOperatingLeasesRightofUseAssets	52400000	USD
CY2019Q1	jbgs	Equity Method Investment Summarized Financial Information Liabilities Operating Lease Liability EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesOperatingLeaseLiability	44100000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	65110000	USD
CY2018Q3	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	76247000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	199897000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	236938000	USD
CY2019Q3	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	10925000	USD
CY2018Q3	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	6861000	USD
	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	21034000	USD
	jbgs	Equity Method Investment Summarized Financial Information Operating Income Loss EquityMethodInvestmentSummarizedFinancialInformationOperatingIncomeLoss	23719000	USD
CY2019Q3	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-3602000	USD
CY2018Q3	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-6970000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-20289000	USD
	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-12159000	USD
CY2019Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	143590000	USD
CY2018Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	129601000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	24084000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	34390000	USD
CY2019Q3	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	50395000	USD
CY2018Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	55469000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	31795000	USD
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2019Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	20011000	USD
CY2018Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	6482000	USD
CY2019Q3	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	3392000	USD
CY2018Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	4806000	USD
CY2019Q3	us-gaap	Deposit Assets DepositAssets	12135000	USD
CY2018Q4	us-gaap	Deposit Assets DepositAssets	3633000	USD
CY2019Q3	us-gaap	Derivative Instruments In Hedges Assets At Fair Value DerivativeInstrumentsInHedgesAssetsAtFairValue	0	USD
CY2018Q4	us-gaap	Derivative Instruments In Hedges Assets At Fair Value DerivativeInstrumentsInHedgesAssetsAtFairValue	10383000	USD
CY2019Q3	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	16358000	USD
CY2018Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	20230000	USD
CY2019Q3	us-gaap	Other Assets OtherAssets	301760000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	264994000	USD
CY2019Q3	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	3400000	USD
CY2018Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	4800000	USD
CY2019Q3	us-gaap	Below Market Lease Net BelowMarketLeaseNet	12243000	USD
CY2018Q4	us-gaap	Below Market Lease Net BelowMarketLeaseNet	14098000	USD
CY2019Q3	us-gaap	Advance Rent AdvanceRent	25810000	USD
CY2018Q4	us-gaap	Advance Rent AdvanceRent	21998000	USD
CY2019Q3	jbgs	Lease Assumptions Liabilities LeaseAssumptionsLiabilities	21856000	USD
CY2018Q4	jbgs	Lease Assumptions Liabilities LeaseAssumptionsLiabilities	23105000	USD
CY2019Q3	us-gaap	Incentive From Lessor IncentiveFromLessor	26317000	USD
CY2018Q4	us-gaap	Incentive From Lessor IncentiveFromLessor	9317000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	34540000	USD
CY2018Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	0	USD
CY2019Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	15601000	USD
CY2018Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	15704000	USD
CY2019Q3	us-gaap	Security Deposit Liability SecurityDepositLiability	16573000	USD
CY2018Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	17696000	USD
CY2019Q3	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17898000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17898000	USD
CY2019Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	0	USD
CY2018Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	3510000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6250000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6878000	USD
CY2019Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	0	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	45193000	USD
CY2019Q3	us-gaap	Derivative Instruments In Hedges Liabilities At Fair Value DerivativeInstrumentsInHedgesLiabilitiesAtFairValue	27577000	USD
CY2018Q4	us-gaap	Derivative Instruments In Hedges Liabilities At Fair Value DerivativeInstrumentsInHedgesLiabilitiesAtFairValue	1723000	USD
CY2019Q3	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	1040000	USD
CY2018Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	4486000	USD
CY2019Q3	us-gaap	Other Liabilities OtherLiabilities	205705000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	181606000	USD
CY2018Q3	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	3552000	USD
CY2019Q3	jbgs	Temporary Equity Other Comprehensive Income Loss TemporaryEquityOtherComprehensiveIncomeLoss	-803000	USD
CY2019Q3	jbgs	Temporary Equity Sharebased Compensation TemporaryEquitySharebasedCompensation	14320000	USD
CY2019Q2	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	574228000	USD
CY2018Q2	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	665623000	USD
CY2019Q3	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	0	USD
CY2018Q3	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	-109208000	USD
CY2019Q3	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	1172000	USD
CY2018Q3	jbgs	Temporary Equity Other Comprehensive Income Loss TemporaryEquityOtherComprehensiveIncomeLoss	696000	USD
CY2019Q3	jbgs	Temporary Equity Contributions Distributions TemporaryEquityContributionsDistributions	-3831000	USD
CY2018Q3	jbgs	Temporary Equity Contributions Distributions TemporaryEquityContributionsDistributions	-4106000	USD
CY2018Q3	jbgs	Temporary Equity Sharebased Compensation TemporaryEquitySharebasedCompensation	12298000	USD
CY2019Q3	us-gaap	Temporary Equity Issue Period Increase Or Decrease TemporaryEquityIssuePeriodIncreaseOrDecrease	1446000	USD
CY2018Q3	us-gaap	Temporary Equity Issue Period Increase Or Decrease TemporaryEquityIssuePeriodIncreaseOrDecrease	-6537000	USD
CY2019Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	586532000	USD
CY2018Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	562318000	USD
CY2018Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	558140000	USD
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	609129000	USD
	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	-57318000	USD
	jbgs	Temporary Equity Redemptionsof Op Units TemporaryEquityRedemptionsofOPUnits	-109208000	USD
	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	3954000	USD
	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	0	USD
	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	4271000	USD
	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	6532000	USD
	jbgs	Temporary Equity Other Comprehensive Income Loss TemporaryEquityOtherComprehensiveIncomeLoss	-3689000	USD
	jbgs	Temporary Equity Other Comprehensive Income Loss TemporaryEquityOtherComprehensiveIncomeLoss	3406000	USD
	jbgs	Temporary Equity Contributions Distributions TemporaryEquityContributionsDistributions	-7670000	USD
	jbgs	Temporary Equity Contributions Distributions TemporaryEquityContributionsDistributions	-8263000	USD
	jbgs	Temporary Equity Sharebased Compensation TemporaryEquitySharebasedCompensation	45937000	USD
	jbgs	Temporary Equity Sharebased Compensation TemporaryEquitySharebasedCompensation	39376000	USD
	us-gaap	Temporary Equity Issue Period Increase Or Decrease TemporaryEquityIssuePeriodIncreaseOrDecrease	42907000	USD
	us-gaap	Temporary Equity Issue Period Increase Or Decrease TemporaryEquityIssuePeriodIncreaseOrDecrease	21346000	USD
CY2019Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	586532000	USD
CY2018Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	562318000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	406000	USD
CY2018Q3	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	873000	USD
	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	61449000	USD
CY2019Q3	jbgs	Allocated Sharebased Compensation Expense Before Capitalization AllocatedSharebasedCompensationExpenseBeforeCapitalization	15723000	USD
CY2018Q3	jbgs	Allocated Sharebased Compensation Expense Before Capitalization AllocatedSharebasedCompensationExpenseBeforeCapitalization	13287000	USD
	jbgs	Allocated Sharebased Compensation Expense Before Capitalization AllocatedSharebasedCompensationExpenseBeforeCapitalization	49380000	USD
	jbgs	Allocated Sharebased Compensation Expense Before Capitalization AllocatedSharebasedCompensationExpenseBeforeCapitalization	42069000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1948000	USD
	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	2379000	USD
CY2019Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	15317000	USD
CY2018Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	12414000	USD
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	47432000	USD
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost1 SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1	39690000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	94700000	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y3M18D
CY2019Q3	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	18141000	USD
CY2018Q3	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	23465000	USD
CY2019Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-2000	USD
CY2018Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-287000	USD
	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	69024000	USD
CY2019Q3	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	698000	USD
CY2018Q3	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1043000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	2576000	USD
	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	3501000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-50000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	1264000	USD
CY2019Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2018Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	135000	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	135000	USD
CY2019Q3	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	8258000	USD
CY2018Q3	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	5681000	USD
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	23211000	USD
	us-gaap	Interest Paid Capitalized InterestPaidCapitalized	14863000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	10583000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	18979000	USD
	us-gaap	Interest Expense InterestExpense	40864000	USD
	us-gaap	Interest Expense InterestExpense	56263000	USD
CY2019Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	11500000	shares
CY2019Q2	us-gaap	Excess Stock Shares Issued ExcessStockSharesIssued	1500000	shares
CY2019Q2	us-gaap	Shares Issued Price Per Share SharesIssuedPricePerShare	42.00
CY2019Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	472800000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	10532000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	26382000	USD
	us-gaap	Profit Loss ProfitLoss	35452000	USD
	us-gaap	Profit Loss ProfitLoss	45619000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1172000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	3552000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4271000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6532000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-127000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	9360000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	22830000	USD
	us-gaap	Net Income Loss NetIncomeLoss	31181000	USD
	us-gaap	Net Income Loss NetIncomeLoss	39214000	USD
CY2019Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	679000	USD
CY2018Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	153000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	1674000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	527000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8681000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	22677000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29507000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	38687000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	134127000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	119835000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	129527000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	118588000	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4700000	shares
CY2018Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3900000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3800000	shares
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-27700000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	8300000	USD
	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	-6300000	USD
CY2019Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-2000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-50000	USD
CY2018Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-287000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	1300000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	9360000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	22830000	USD
	us-gaap	Net Income Loss NetIncomeLoss	31181000	USD
	us-gaap	Net Income Loss NetIncomeLoss	39214000	USD
CY2019Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	46862000	USD
CY2018Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	46603000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	141576000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	143880000	USD
CY2019Q3	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	11015000	USD
CY2018Q3	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	8201000	USD
	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	34888000	USD
	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	25218000	USD
CY2019Q3	us-gaap	Management Fee Expense ManagementFeeExpense	29809000	USD
CY2018Q3	us-gaap	Management Fee Expense ManagementFeeExpense	20754000	USD
	us-gaap	Management Fee Expense ManagementFeeExpense	86585000	USD
	us-gaap	Management Fee Expense ManagementFeeExpense	64552000	USD
CY2019Q3	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	9549000	USD
CY2018Q3	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	8387000	USD
	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	30203000	USD
	jbgs	Allocated Sharebased Compensation Expense Formation Transaction AllocatedSharebasedCompensationExpenseFormationTransaction	26912000	USD
	jbgs	Transactionandothercosts Transactionandothercosts	9928000	USD
	jbgs	Transactionandothercosts Transactionandothercosts	12134000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	10583000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	18979000	USD
	us-gaap	Interest Expense InterestExpense	40864000	USD
CY2019Q3	jbgs	Transactionandothercosts Transactionandothercosts	2059000	USD
CY2018Q3	jbgs	Transactionandothercosts Transactionandothercosts	4126000	USD
	us-gaap	Interest Expense InterestExpense	56263000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-79000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1889000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4536000	USD
CY2019Q3	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
CY2018Q3	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	0	USD
	jbgs	Business Combination Provisional Information Initial Accounting Incomplete Adjustment Bargain Purchase Reduction Of Gain BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentBargainPurchaseReductionOfGain	-7606000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	432000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-841000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-689000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1436000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1172000	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	3552000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	4271000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	6532000	USD
CY2019Q3	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	34587000	USD
CY2018Q3	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	23788000	USD
	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	91765000	USD
	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	72278000	USD
CY2019Q3	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	2196000	USD
CY2018Q3	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	1708000	USD
	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	5951000	USD
	jbgs	Other Income Excluding Parking Income OtherIncomeExcludingParkingIncome	4904000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1144000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13484000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	647000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15418000	USD
CY2019Q3	us-gaap	Investment Income Net InvestmentIncomeNet	-640000	USD
CY2018Q3	us-gaap	Investment Income Net InvestmentIncomeNet	4091000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	2363000	USD
	us-gaap	Investment Income Net InvestmentIncomeNet	5177000	USD
CY2019Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	8088000	USD
CY2019Q3	jbgs	Consolidated Noi ConsolidatedNOI	77754000	USD
CY2018Q3	jbgs	Consolidated Noi ConsolidatedNOI	77661000	USD
	jbgs	Consolidated Noi ConsolidatedNOI	232849000	USD
	jbgs	Consolidated Noi ConsolidatedNOI	241718000	USD
CY2018Q3	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	11938000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	47121000	USD
	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	45789000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
CY2018Q3	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	0	USD
	us-gaap	Net Income Loss Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossAttributableToNonredeemableNoncontrollingInterest	-127000	USD
CY2019Q3	jbgs	Parking Income ParkingIncome	6300000	USD
CY2018Q3	jbgs	Parking Income ParkingIncome	6400000	USD
	jbgs	Parking Income ParkingIncome	19500000	USD
	jbgs	Parking Income ParkingIncome	19300000	USD
CY2019Q3	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	5870590000	USD
CY2019Q3	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	320920000	USD
CY2019Q3	us-gaap	Assets Assets	6022264000	USD
CY2018Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	5792734000	USD
CY2018Q4	us-gaap	Real Estate Investments Unconsolidated Real Estate And Other Joint Ventures RealEstateInvestmentsUnconsolidatedRealEstateAndOtherJointVentures	322878000	USD
CY2018Q4	us-gaap	Assets Assets	5997285000	USD
	jbgs	General Liability Insurance Coverage Limit Per Occurrence GeneralLiabilityInsuranceCoverageLimitPerOccurrence	200000000.0	USD
	jbgs	Propertyand Rental Value Insurance Coverage Limit PropertyandRentalValueInsuranceCoverageLimit	2000000000.0	USD
	jbgs	Terrorist Acts Insurance Coverage Limit Per Occurrence TerroristActsInsuranceCoverageLimitPerOccurrence	2000000000.0	USD
CY2019Q3	us-gaap	Purchase Obligation PurchaseObligation	283800000	USD
CY2019Q3	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	17900000	USD
CY2019Q3	us-gaap	Other Commitment OtherCommitment	47100000	USD
CY2019Q3	jbgs	Qualified Affordable Housing Project Investments Total Capital Commitments QualifiedAffordableHousingProjectInvestmentsTotalCapitalCommitments	93700000	USD

Files In Submission

Name	View Source	Status
0001689796-19-000027-index-headers.html	Edgar Link	pending
0001689796-19-000027-index.html	Edgar Link	pending
0001689796-19-000027.txt	Edgar Link	pending
0001689796-19-000027-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
jbgs-10q93019exhibit311.htm	Edgar Link	pending
jbgs-10q93019exhibit312.htm	Edgar Link	pending
jbgs-10q93019exhibit321.htm	Edgar Link	pending
jbgs-20190930.xsd	Edgar Link	pending
jbgs-20190930_cal.xml	Edgar Link	unprocessable
jbgs-20190930_def.xml	Edgar Link	unprocessable
jbgs-20190930_lab.xml	Edgar Link	unprocessable
jbgs-20190930_pre.xml	Edgar Link	unprocessable
jbgs-9301910xq.htm	Edgar Link	pending
jbgs-9301910xq_htm.xml	Edgar Link	completed
logoverticaltransbluea08.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
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$JBGS
JBG SMITH Properties Stock $jbgs

2019 Q4 Form 10-Q Financial Statement

#000168979619000027 Filed on November 05, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JBGS JBG SMITH Properties Stock $jbgs

2019 Q4 Form 10-Q Financial Statement

#000168979619000027 Filed on November 05, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$JBGS
JBG SMITH Properties Stock $jbgs