$CDP
COPT Defense Properties Stock $cdp

$cdp Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-Q Financial Statement

#000086054618000041 Filed on November 08, 2018

Income Statement

Concept	2018 Q4	2018 Q3	2017 Q4
Revenue	$138.5M	$137.4M	$164.6M
YoY Change	-15.85%	-12.49%	15.9%
Cost Of Revenue	$58.40M	$8.058M	$83.50M
YoY Change	-30.06%	-72.01%	38.02%
Gross Profit	$80.10M	$129.4M	$81.10M
YoY Change	-1.23%	0.88%	-0.49%
Gross Profit Margin	57.84%	94.14%	49.28%
Selling, General & Admin	$7.100M	$6.899M	$7.000M
YoY Change	1.43%	-6.37%	-10.26%
% of Gross Profit	8.86%	5.33%	8.63%
Research & Development	$1.400M	$1.600M	$1.600M
YoY Change	-12.5%	23.08%	-5.88%
% of Gross Profit	1.75%	1.24%	1.97%
Depreciation & Amortization	$36.70M	$34.70M	$34.50M
YoY Change	6.38%	-1.14%	2.99%
% of Gross Profit	45.82%	26.83%	42.54%
Operating Expenses	$44.80M	$6.899M	$42.50M
YoY Change	5.41%	-6.37%	0.0%
Operating Profit	$35.30M	$37.35M	$24.85M
YoY Change	42.07%	-4.08%	-33.64%
Interest Expense	-$16.80M	-$17.30M	-$17.30M
YoY Change	-2.89%	-2.26%	5.49%
% of Operating Profit	-47.59%	-46.32%	-69.63%
Other Income/Expense, Net
YoY Change
Pretax Income	$18.20M	$19.66M	$17.40M
YoY Change	4.6%	-10.73%	-13.0%
Income Tax	-$200.0K	-$291.0K	$1.000M
% Of Pretax Income	-1.1%	-1.48%	5.75%
Net Earnings	$17.02M	$18.70M	$9.621M
YoY Change	76.9%	-9.15%	-61.1%
Net Earnings / Revenue	12.29%	13.61%	5.85%
Basic Earnings Per Share	$0.16	$0.18	$0.10
Diluted Earnings Per Share	$0.16	$0.18	$0.10
COMMON SHARES
Basic Shares Outstanding	108.9M shares	104.4M shares	99.61M shares
Diluted Shares Outstanding		104.8M shares

Balance Sheet

Concept	2018 Q4	2018 Q3	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$8.100M	$9.500M	$12.30M
YoY Change	-34.15%	-12.84%	-94.14%
Cash & Equivalents	$8.066M	$9.492M	$12.26M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory	$0.00	$42.20M	$42.20M
Prepaid Expenses
Receivables	$26.30M	$19.20M	$31.80M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$34.40M	$70.90M	$86.30M
YoY Change	-60.14%	-37.2%	-74.54%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.259B	$7.087M	$5.256M
YoY Change	61911.04%	30.71%	1.0%
Goodwill
YoY Change
Intangibles	$43.47M	$47.07M	$59.09M
YoY Change	-26.44%	-26.52%	-24.58%
Long-Term Investments	$49.70M	$49.70M	$2.412M
YoY Change	1960.53%	1959.68%	2.42%
Other Assets	$86.60M	$86.30M	$77.50M
YoY Change	11.74%	-2.38%	-3.13%
Total Long-Term Assets	$3.622B	$3.579B	$3.509B
YoY Change	3.21%	3.34%	1.95%
TOTAL ASSETS
Total Short-Term Assets	$34.40M	$70.90M	$86.30M
Total Long-Term Assets	$3.622B	$3.579B	$3.509B
Total Assets	$3.656B	$3.650B	$3.595B
YoY Change	1.69%	2.06%	-4.91%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$92.90M	$90.20M	$108.1M
YoY Change	-14.06%	-25.76%	-0.55%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$0.00
YoY Change		-100.0%
Total Short-Term Liabilities	$153.8M	$143.8M	$162.7M
YoY Change	-5.47%	-25.1%	-4.18%
LONG-TERM LIABILITIES
Long-Term Debt	$1.825B	$1.809B	$1.844B
YoY Change	-1.06%	-3.48%	-4.48%
Other Long-Term Liabilities	$24.30M	$62.70M	$96.90M
YoY Change	-74.92%	12.16%	54.3%
Total Long-Term Liabilities	$1.849B	$1.871B	$1.941B
YoY Change	-4.75%	-3.03%	-2.62%
TOTAL LIABILITIES
Total Short-Term Liabilities	$153.8M	$143.8M	$162.7M
Total Long-Term Liabilities	$1.849B	$1.871B	$1.941B
Total Liabilities	$2.003B	$2.015B	$2.104B
YoY Change	-4.8%	-5.02%	-2.75%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$1.102M	$1.088M	$1.013M
YoY Change	8.79%	9.24%	2.84%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.585B	$1.568B	$1.402B
YoY Change
Total Liabilities & Shareholders Equity	$3.656B	$3.650B	$3.595B
YoY Change	1.69%	2.54%	-4.91%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2017 Q4
OPERATING ACTIVITIES
Net Income	$17.02M	$18.70M	$9.621M
YoY Change	76.9%	-9.15%	-61.1%
Depreciation, Depletion And Amortization	$36.70M	$34.70M	$34.50M
YoY Change	6.38%	-1.14%	2.99%
Cash From Operating Activities	$58.80M	$41.00M	$60.70M
YoY Change	-3.13%	-21.0%	-2.88%
INVESTING ACTIVITIES
Capital Expenditures	-$72.10M	-$52.50M	-$108.1M
YoY Change	-33.3%	40.75%	105.12%
Acquisitions
YoY Change
Other Investing Activities	-$8.100M	-$3.400M	$71.10M
YoY Change	-111.39%	-107.78%	53.56%
Cash From Investing Activities	-$80.20M	-$55.90M	-$36.90M
YoY Change	117.34%	-987.3%	467.69%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	20.50M	15.30M	-21.50M
YoY Change	-195.35%	-125.93%	-120.24%
NET CHANGE
Cash From Operating Activities	58.80M	41.00M	60.70M
Cash From Investing Activities	-80.20M	-55.90M	-36.90M
Cash From Financing Activities	20.50M	15.30M	-21.50M
Net Change In Cash	-900.0K	400.0K	2.300M
YoY Change	-139.13%	-150.0%	-98.58%
FREE CASH FLOW
Cash From Operating Activities	$58.80M	$41.00M	$60.70M
Capital Expenditures	-$72.10M	-$52.50M	-$108.1M
Free Cash Flow	$130.9M	$93.50M	$168.8M
YoY Change	-22.45%	4.82%	46.53%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	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	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000860546
CY2018Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	108855016	shares
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	CORPORATE OFFICE PROPERTIES TRUST
	ofc	Adjustmentto Equityto Arriveat Fair Valueof Redeemable Noncontrolling Interest AdjustmenttoEquitytoArriveatFairValueofRedeemableNoncontrollingInterest	244000	USD
	ofc	Adjustmentto Equityto Arriveat Fair Valueof Redeemable Noncontrolling Interest AdjustmenttoEquitytoArriveatFairValueofRedeemableNoncontrollingInterest	-1331000	USD
CY2017Q4	ofc	Advance Rent And Security Deposit Liability AdvanceRentAndSecurityDepositLiability	25648000	USD
CY2018Q3	ofc	Advance Rent And Security Deposit Liability AdvanceRentAndSecurityDepositLiability	23159000	USD
CY2017Q4	ofc	Allowancefor Doubtful Accounts Deferred Rent AllowanceforDoubtfulAccountsDeferredRent	364000	USD
CY2018Q3	ofc	Allowancefor Doubtful Accounts Deferred Rent AllowanceforDoubtfulAccountsDeferredRent	438000	USD
CY2017Q3	ofc	Business Development Expenses And Land Carry Costs BusinessDevelopmentExpensesAndLandCarryCosts	1277000	USD
	ofc	Business Development Expenses And Land Carry Costs BusinessDevelopmentExpensesAndLandCarryCosts	4567000	USD
CY2018Q3	ofc	Business Development Expenses And Land Carry Costs BusinessDevelopmentExpensesAndLandCarryCosts	1567000	USD
	ofc	Business Development Expenses And Land Carry Costs BusinessDevelopmentExpensesAndLandCarryCosts	4415000	USD
CY2017Q2	ofc	Capital Leases Purchase Option Amount CapitalLeasesPurchaseOptionAmount	1	USD
	ofc	Comprehensive Income Loss Net Of Tax After Redeemable Noncontrolling Interest Adjustments ComprehensiveIncomeLossNetOfTaxAfterRedeemableNoncontrollingInterestAdjustments	63115000	USD
	ofc	Comprehensive Income Loss Net Of Tax After Redeemable Noncontrolling Interest Adjustments ComprehensiveIncomeLossNetOfTaxAfterRedeemableNoncontrollingInterestAdjustments	66188000	USD
	ofc	Construction Contract And Other Service Expenses Paid ConstructionContractAndOtherServiceExpensesPaid	57189000	USD
	ofc	Construction Contract And Other Service Expenses Paid ConstructionContractAndOtherServiceExpensesPaid	71034000	USD
	ofc	Construction Contract And Other Service Revenues Received ConstructionContractAndOtherServiceRevenuesReceived	72682000	USD
	ofc	Construction Contract And Other Service Revenues Received ConstructionContractAndOtherServiceRevenuesReceived	27450000	USD
CY2017Q3	ofc	Depreciation And Amortization For Real Estate Operations DepreciationAndAmortizationForRealEstateOperations	34438000	USD
	ofc	Depreciation And Amortization For Real Estate Operations DepreciationAndAmortizationForRealEstateOperations	100290000	USD
CY2018Q3	ofc	Depreciation And Amortization For Real Estate Operations DepreciationAndAmortizationForRealEstateOperations	34195000	USD
	ofc	Depreciation And Amortization For Real Estate Operations DepreciationAndAmortizationForRealEstateOperations	100897000	USD
	ofc	Equity Change Adjustments To Additional Paid In Capital Reallocation Of Minority Interest EquityChangeAdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest	589000	USD
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	ofc	Equity Change Stock Issued During Period Value Conversion Of Units EquityChangeStockIssuedDuringPeriodValueConversionOfUnits	4602000	USD
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	ofc	Equityin Other Comprehensive Income Lossofan Equity Method Investee EquityinOtherComprehensiveIncomeLossofanEquityMethodInvestee	39000	USD
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	ofc	Generaland Administrative Leasing Business Developmentand Land Carry Paid GeneralandAdministrativeLeasingBusinessDevelopmentandLandCarryPaid	27066000	USD
	ofc	Generaland Administrative Leasing Business Developmentand Land Carry Paid GeneralandAdministrativeLeasingBusinessDevelopmentandLandCarryPaid	20858000	USD
CY2017Q3	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	830000	USD
	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	2481000	USD
CY2018Q3	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	830000	USD
	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	2482000	USD
CY2017Q3	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	-1000	USD
	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	-3000	USD
CY2018Q3	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	-2000	USD
	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	-5000	USD
	ofc	Increase Decrease In Accrued Capital Improvements Leasing And Other Investing Activity Costs IncreaseDecreaseInAccruedCapitalImprovementsLeasingAndOtherInvestingActivityCosts	17129000	USD
	ofc	Increase Decrease In Accrued Capital Improvements Leasing And Other Investing Activity Costs IncreaseDecreaseInAccruedCapitalImprovementsLeasingAndOtherInvestingActivityCosts	3550000	USD
	ofc	Increase Decrease In Advance Rent And Security Deposit Liability IncreaseDecreaseInAdvanceRentAndSecurityDepositLiability	-3575000	USD
	ofc	Increase Decrease In Advance Rent And Security Deposit Liability IncreaseDecreaseInAdvanceRentAndSecurityDepositLiability	-2489000	USD
	ofc	Increase Decrease In Fair Value Of Derivatives Applied To Aocl And Noncontrolling Interests IncreaseDecreaseInFairValueOfDerivativesAppliedToAoclAndNoncontrollingInterests	774000	USD
	ofc	Increase Decrease In Fair Value Of Derivatives Applied To Aocl And Noncontrolling Interests IncreaseDecreaseInFairValueOfDerivativesAppliedToAoclAndNoncontrollingInterests	7802000	USD
CY2017Q2	ofc	Lessee Leasing Arrangements Capital Leases Termof Contract LesseeLeasingArrangementsCapitalLeasesTermofContract	P99Y
CY2018Q3	ofc	Maximum Additional Costs Agreed To Be Paid By The Entity Under Environmental Indemnification Agreement MaximumAdditionalCostsAgreedToBePaidByTheEntityUnderEnvironmentalIndemnificationAgreement	19000000	USD
	ofc	Minority Interest Decrease From Distributions Including Joint Ventures MinorityInterestDecreaseFromDistributionsIncludingJointVentures	2614000	USD
	ofc	Minority Interest Decrease From Distributions Including Joint Ventures MinorityInterestDecreaseFromDistributionsIncludingJointVentures	11000	USD
	ofc	Minority Interest Decrease From Distributions To Operating Partnership Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToOperatingPartnershipNoncontrollingInterestHolders	3262000	USD
	ofc	Minority Interest Decrease From Distributions To Operating Partnership Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToOperatingPartnershipNoncontrollingInterestHolders	2626000	USD
CY2017Q3	ofc	Minority Interest In Net Income Loss Other Including Joint Ventures Minority Interests MinorityInterestInNetIncomeLossOtherIncludingJointVenturesMinorityInterests	897000	USD
	ofc	Minority Interest In Net Income Loss Other Including Joint Ventures Minority Interests MinorityInterestInNetIncomeLossOtherIncludingJointVenturesMinorityInterests	2738000	USD
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	ofc	Minority Interest In Net Income Loss Other Including Joint Ventures Minority Interests MinorityInterestInNetIncomeLossOtherIncludingJointVenturesMinorityInterests	2879000	USD
	ofc	Noncontrolling Interest Increasefrom Contributions NoncontrollingInterestIncreasefromContributions	0	USD
	ofc	Noncontrolling Interest Increasefrom Contributions NoncontrollingInterestIncreasefromContributions	186000	USD
CY2017Q4	ofc	Nonreal Estate Equity Investments NonrealEstateEquityInvestments	5056000	USD
CY2018Q3	ofc	Nonreal Estate Equity Investments NonrealEstateEquityInvestments	5085000	USD
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	ofc	Paymentsof Distributions Redeemable Noncontrolling Interest PaymentsofDistributionsRedeemableNoncontrollingInterest	7860000	USD
	ofc	Paymentsof Distributions Redeemable Noncontrolling Interest PaymentsofDistributionsRedeemableNoncontrollingInterest	1090000	USD
	ofc	Paymentsof Lease Incentives PaymentsofLeaseIncentives	9414000	USD
	ofc	Paymentsof Lease Incentives PaymentsofLeaseIncentives	5985000	USD
	ofc	Property Operating Expenses Paid PropertyOperatingExpensesPaid	144527000	USD
	ofc	Property Operating Expenses Paid PropertyOperatingExpensesPaid	150039000	USD
CY2018Q3	ofc	Property Subjectto Environmental Indemnity Numberof Properties PropertySubjecttoEnvironmentalIndemnityNumberofProperties	3	Property
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2201047000	USD
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	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4444000	USD
CY2017Q3	us-gaap	Assets Assets	3576841000	USD
CY2017Q4	us-gaap	Assets Assets	3595205000	USD
CY2018Q3	us-gaap	Assets Assets	3650366000	USD
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	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5179000	USD
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	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	3602000	USD
CY2018Q3	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	1206000	USD
	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	3607000	USD
CY2017Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	108137000	USD
CY2018Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	90224000	USD
CY2017Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	31802000	USD
CY2018Q3	us-gaap	Accounts Receivable Net AccountsReceivableNet	19245000	USD
CY2016Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	747825000	USD
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CY2017Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	802085000	USD
CY2018Q3	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	833508000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2167000	USD
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CY2018Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	850000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	3514000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2478000	USD
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	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1464000	USD
CY2018Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
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	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	16127000	USD
	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2018Q3	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	660000	USD
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CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12624000	USD
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.46
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1765000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4839000	USD
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	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5145000	USD
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	64835000	USD
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	68091000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	14831000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12932000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-199995000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1899000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.275
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.825
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2750
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.825
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2018Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	101292299	shares
CY2018Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	108848223	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	98498651	shares
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	99608170	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	101292299	shares
CY2018Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	108848223	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1013000	USD
CY2018Q3	us-gaap	Common Stock Value CommonStockValue	1088000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	20883000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	59996000	USD
CY2018Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19793000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	62946000	USD
CY2017Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	28788000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	63589000	USD
CY2018Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	8058000	USD
	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	51215000	USD
CY2017Q3	us-gaap	Costs And Expenses CostsAndExpenses	118078000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	337263000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	100059000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	328083000	USD
CY2017Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	4884000	USD
CY2018Q3	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	2821000	USD
CY2017Q4	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	4616000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018Q3	us-gaap	Deferred Compensation Plan Assets DeferredCompensationPlanAssets	4346000	USD
CY2018Q3	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	49340000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	149737000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.21
CY2017Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	29560000	USD
CY2018Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	30832000	USD
CY2017Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	48322000	USD
CY2018Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	49510000	USD
CY2017Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	86710000	USD
CY2018Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	89171000	USD
CY2017Q4	us-gaap	Deferred Revenue Leases Net DeferredRevenueLeasesNet	11682000	USD
CY2018Q3	us-gaap	Deferred Revenue Leases Net DeferredRevenueLeasesNet	10006000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1892000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2080000	USD
CY2017Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	34438000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	100290000	USD
CY2018Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	34195000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	100897000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	101963000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	102440000	USD
CY2017Q4	us-gaap	Development In Process DevelopmentInProcess	403494000	USD
CY2018Q3	us-gaap	Development In Process DevelopmentInProcess	410850000	USD
CY2017Q3	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	46368000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	143515000	USD
	us-gaap	Dividends Dividends	88300000	USD
	us-gaap	Dividends Dividends	86428000	USD
CY2017Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	28462000	USD
CY2017Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	28921000	USD
CY2018Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	30483000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.54
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.54
	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	5438000	USD
	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	-27000	USD
CY2017Q3	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	1188000	USD
	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	5438000	USD
CY2018Q3	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	0	USD
	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	-27000	USD
CY2017Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-513000	USD
CY2018Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	1457000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	0	USD
CY2017Q4	us-gaap	Incentive To Lessee IncentiveToLessee	19011000	USD
CY2018Q3	us-gaap	Incentive To Lessee IncentiveToLessee	18583000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22020000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	62960000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19657000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58894000	USD
CY2017Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	371000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1118000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	374000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1120000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	57000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	145000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-291000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-173000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-7498000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-12404000	USD
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-5220000	USD
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-48649000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-4718000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3810000	USD
CY2017Q3	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	0	shares
	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	0	shares
CY2018Q3	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	178000	shares
	us-gaap	Incremental Common Shares Attributable To Equity Forward Agreements IncrementalCommonSharesAttributableToEquityForwardAgreements	60000	shares
CY2017Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	146000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	154000	shares
CY2018Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	231000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	165000	shares
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	59092000	USD
CY2018Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	47065000	USD
CY2017Q3	us-gaap	Interest And Debt Expense InterestAndDebtExpense	19615000	USD
	us-gaap	Interest And Debt Expense InterestAndDebtExpense	57772000	USD
CY2018Q3	us-gaap	Interest And Debt Expense InterestAndDebtExpense	19181000	USD
	us-gaap	Interest And Debt Expense InterestAndDebtExpense	56910000	USD
CY2017Q3	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1100000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4200000	USD
CY2018Q3	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1400000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4200000	USD
	us-gaap	Interest Paid Net InterestPaidNet	55637000	USD
	us-gaap	Interest Paid Net InterestPaidNet	55611000	USD
CY2017Q4	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	3073000	USD
CY2018Q3	us-gaap	Interest Rate Derivative Assets At Fair Value InterestRateDerivativeAssetsAtFairValue	10875000	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	43661000	USD
CY2017Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	42263000	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	41787000	USD
CY2018Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	40318000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	2103773000	USD
CY2018Q3	us-gaap	Liabilities Liabilities	2015206000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3595205000	USD
CY2018Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3650366000	USD
CY2017Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	43377000	USD
CY2018Q3	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	43377000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	1828333000	USD
CY2018Q3	us-gaap	Long Term Debt LongTermDebt	1808030000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	72267000	USD
CY2017Q3	us-gaap	Minority Interest MinorityInterest	44716000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	66165000	USD
CY2018Q3	us-gaap	Minority Interest MinorityInterest	41557000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	-244000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	1331000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1186000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1114000	USD
CY2017Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	45097000	USD
CY2018Q3	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	19525000	USD
CY2017Q4	us-gaap	Minority Interest In Preferred Unit Holders MinorityInterestInPreferredUnitHolders	8800000	USD
CY2018Q3	us-gaap	Minority Interest In Preferred Unit Holders MinorityInterestInPreferredUnitHolders	8800000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-316953000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	29120000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-52470000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-152686000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	169428000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	121667000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	20579000	USD
	us-gaap	Net Income Loss NetIncomeLoss	59124000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	18697000	USD
	us-gaap	Net Income Loss NetIncomeLoss	55281000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1720000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1903000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20579000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	46058000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	18697000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	55281000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	20484000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	45721000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	18583000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	54933000	USD
CY2017Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	693000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	1576000	USD
CY2018Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	380000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	1532000	USD
CY2017Q3	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Nonredeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersNonredeemable	165000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Nonredeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersNonredeemable	495000	USD
CY2018Q3	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Nonredeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersNonredeemable	165000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Preferred Unit Holders Nonredeemable NoncontrollingInterestInNetIncomeLossPreferredUnitHoldersNonredeemable	495000	USD
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	0	USD
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	0	USD
CY2017Q4	us-gaap	Notes Receivable Net NotesReceivableNet	57493000	USD
CY2018Q3	us-gaap	Notes Receivable Net NotesReceivableNet	55688000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	38939000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	110990000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	37352000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	111547000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	88326000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1143000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1258000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1261000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1297000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	83039000	USD
CY2018Q3	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	328000	USD
CY2017Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	102275000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	304237000	USD
CY2018Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	102132000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	304087000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	3379000	USD
CY2018Q3	us-gaap	Other Assets OtherAssets	4648000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	39000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	314000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	902000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1118000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7904000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-615000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2740000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	207000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	9000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-301000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1877000	USD
CY2018Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1325000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	7913000	USD
CY2017Q4	us-gaap	Other Liabilities OtherLiabilities	41822000	USD
CY2018Q3	us-gaap	Other Liabilities OtherLiabilities	9267000	USD
CY2017Q4	us-gaap	Other Minority Interests OtherMinorityInterests	12268000	USD
CY2018Q3	us-gaap	Other Minority Interests OtherMinorityInterests	13232000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2969000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1969000	USD
CY2017Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1508000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	4817000	USD
CY2018Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1486000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	4284000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1373000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	3371000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	2572000	USD
CY2017Q3	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	0	USD
	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	6847000	USD
CY2018Q3	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	0	USD
	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	0	USD
CY2017Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	95000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	337000	USD
CY2018Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	114000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	348000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	15174000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	13357000	USD
	us-gaap	Payments For Leasing Costs PaymentsForLeasingCosts	6468000	USD
	us-gaap	Payments For Leasing Costs PaymentsForLeasingCosts	6277000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1619000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-762000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1869000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1611000	USD
	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	199083000	USD
	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	0	USD
	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	19876000	USD
	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	27962000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	81779000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	84349000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	3169000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	9305000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3413000	USD
	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	113678000	USD
	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	105852000	USD
CY2017Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	6219000	USD
CY2018Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	71334000	USD
CY2018Q3	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	79349000	USD
CY2017Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	24670000	USD
CY2018Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	31259000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	19834000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	162230000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	11267000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	268000000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	208000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-492000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5205000	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	150000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	101107000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	0	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	22334000	USD
	us-gaap	Profit Loss ProfitLoss	63933000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	20322000	USD
	us-gaap	Profit Loss ProfitLoss	60187000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5256000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	7087000	USD
CY2017Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	3141105000	USD
CY2018Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	3207427000	USD
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	23125000	USD
CY2018Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	25431000	USD
CY2016Q4	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	22979000	USD
CY2017Q3	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	23269000	USD
CY2017Q4	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	23125000	USD
CY2018Q3	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	25431000	USD
CY2017Q4	us-gaap	Rental Properties RentalProperties	2737611000	USD
CY2018Q3	us-gaap	Rental Properties RentalProperties	2796577000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	0	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	15379000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	98000000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	235000000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	200000000	USD
CY2016Q4	us-gaap	Restricted Cash RestrictedCash	2756000	USD
CY2017Q3	us-gaap	Restricted Cash RestrictedCash	1766000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	2570000	USD
CY2018Q3	us-gaap	Restricted Cash RestrictedCash	3440000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	29786000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	65958000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	8423000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	53202000	USD
CY2017Q3	us-gaap	Revenues Revenues	157017000	USD
	us-gaap	Revenues Revenues	448253000	USD
CY2018Q3	us-gaap	Revenues Revenues	137411000	USD
	us-gaap	Revenues Revenues	439630000	USD
CY2017Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	7368000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23838000	USD
CY2018Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	6899000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	21819000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4092000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4735000	USD
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	337000	shares
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	1900000	shares
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	1895627	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	176477	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	141633	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	5000	shares
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	0	USD
	us-gaap	Stock Issued During Period Value Conversion Of Units StockIssuedDuringPeriodValueConversionOfUnits	0	USD
	us-gaap	Stock Redeemed Or Called During Period Value StockRedeemedOrCalledDuringPeriodValue	172500000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1869000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1611000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1402142000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	1568172000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1612777000	USD
CY2017Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1431853000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1468307000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1609729000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1 StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	1468307000	USD
	us-gaap	Straight Line Rent StraightLineRent	545000	USD
	us-gaap	Straight Line Rent StraightLineRent	3687000	USD
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	99258000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	99009000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	104788000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	102626000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	99112000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	98855000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	104379000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	102401000	shares
	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Organization</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Corporate Office Properties Trust (“COPT”) and subsidiaries (collectively, the “Company”) is a fully-integrated and self-managed real estate investment trust (“REIT”). Corporate Office Properties, L.P. (“COPLP”) and subsidiaries (collectively, the “Operating Partnership”) is the entity through which COPT, the sole general partner of COPLP, conducts almost all of its operations and owns almost all of its assets. Unless otherwise expressly stated or the context otherwise requires, “we”, “us” and “our” as used herein refer to each of the Company and the Operating Partnership. We own, manage, lease, develop and selectively acquire office and data center properties. The majority of our portfolio is in locations that support the United States Government and its contractors, most of whom are engaged in national security, defense and information technology (“IT”) related activities servicing what we believe are growing, durable, priority missions (“Defense/IT Locations”). We also own a portfolio of office properties located in select urban/urban-like submarkets in the Greater Washington, DC/Baltimore region</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">with durable Class-A office fundamentals and characteristics (“Regional Office”). As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">September 30, 2018</font><font style="font-family:inherit;font-size:10pt;">, our properties included the following:</font></div><div style="line-height:120%;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:0px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">161</font><font style="font-family:inherit;font-size:10pt;"> properties totaling </font><font style="font-family:inherit;font-size:10pt;">17.9 million</font><font style="font-family:inherit;font-size:10pt;"> square feet comprised of </font><font style="font-family:inherit;font-size:10pt;">15.1 million</font><font style="font-family:inherit;font-size:10pt;"> square feet in </font><font style="font-family:inherit;font-size:10pt;">144</font><font style="font-family:inherit;font-size:10pt;"> office properties and </font><font style="font-family:inherit;font-size:10pt;">2.7 million</font><font style="font-family:inherit;font-size:10pt;"> square feet in </font><font style="font-family:inherit;font-size:10pt;">17</font><font style="font-family:inherit;font-size:10pt;"> single-tenant data center shell properties (“data center shells”). We owned </font><font style="font-family:inherit;font-size:10pt;">six</font><font style="font-family:inherit;font-size:10pt;"> of these data center shells through an unconsolidated real estate joint venture;</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:0px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">a wholesale data center with a critical load of </font><font style="font-family:inherit;font-size:10pt;">19.25</font><font style="font-family:inherit;font-size:10pt;"> megawatts;</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:0px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">11</font><font style="font-family:inherit;font-size:10pt;"> properties under construction or redevelopment (</font><font style="font-family:inherit;font-size:10pt;">six</font><font style="font-family:inherit;font-size:10pt;"> office properties and </font><font style="font-family:inherit;font-size:10pt;">five</font><font style="font-family:inherit;font-size:10pt;"> data center shells) that we estimate will total approximately </font><font style="font-family:inherit;font-size:10pt;">1.4 million</font><font style="font-family:inherit;font-size:10pt;"> square feet upon completion, including </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;"> partially-operational properties; and</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:0px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">approximately </font><font style="font-family:inherit;font-size:10pt;">900</font><font style="font-family:inherit;font-size:10pt;"> acres of land controlled for future development that we believe could be developed into approximately </font><font style="font-family:inherit;font-size:10pt;">11.9 million</font><font style="font-family:inherit;font-size:10pt;"> square feet and </font><font style="font-family:inherit;font-size:10pt;">150</font><font style="font-family:inherit;font-size:10pt;"> acres of other land.</font></div></td></tr></table><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">COPLP owns real estate directly and through subsidiary partnerships and limited liability companies (“LLCs”).  In addition to owning real estate, COPLP also owns subsidiaries that provide real estate services such as property management and construction and development services primarily for our properties but also for third parties. Some of these services are performed by a taxable REIT subsidiary (“TRS”).</font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Equity interests in COPLP are in the form of common and preferred units. As of </font><font style="font-family:inherit;font-size:10pt;">September 30, 2018</font><font style="font-family:inherit;font-size:10pt;">, COPT owned </font><font style="font-family:inherit;font-size:10pt;">98.8%</font><font style="font-family:inherit;font-size:10pt;"> of the outstanding COPLP common units (“common units”); the remaining common units and all of the outstanding COPLP preferred units (“preferred units”) were owned by third parties. Common units not owned by COPT carry certain redemption rights. The number of common units owned by COPT is equivalent to the number of outstanding common shares of beneficial interest (“common shares”) of COPT, and the entitlement of all common units to quarterly distributions and payments in liquidation is substantially the same as those of COPT common shareholders. Similarly, in the case of any series of preferred units held by COPT, there is a series of preferred shares of beneficial interest (“preferred shares”) in COPT that is equivalent in number and carries substantially the same terms as such series of COPLP preferred units. COPT’s common shares are publicly traded on the New York Stock Exchange (“NYSE”) under the ticker symbol “OFC”. </font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Because COPLP is managed by COPT, and COPT conducts substantially all of its operations through COPLP, we refer to COPT’s executive officers as COPLP’s executive officers; similarly, although COPLP does not have a board of trustees, we refer to COPT’s Board of Trustees as COPLP’s Board of Trustees.</font></div></div>
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Reclassification</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We reclassified certain amounts from prior periods to conform to the current period presentation of our consolidated financial statements with no effect on previously reported net income or equity, including restricted cash and marketable securities that were reclassified to the line entitled “prepaid expenses and other assets, net” on our consolidated balance sheets after having been reported on a separate line in our Quarterly Reports on Form 10-Q filed in prior years and previous Annual Reports on Form 10-K. </font></div><div style="line-height:120%;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>

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0000860546-18-000041-index.html	Edgar Link	pending
0000860546-18-000041.txt	Edgar Link	pending
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copt09302018ex311.htm	Edgar Link	pending
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copt10qdoc09302018document.htm	Edgar Link	pending
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$CDP
COPT Defense Properties Stock $cdp

2018 Q4 Form 10-Q Financial Statement

#000086054618000041 Filed on November 08, 2018

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$CDP COPT Defense Properties Stock $cdp

2018 Q4 Form 10-Q Financial Statement

#000086054618000041 Filed on November 08, 2018

Income Statement

Balance Sheet

Cashflow Statement

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Files In Submission

$CDP
COPT Defense Properties Stock $cdp