$CDP
COPT Defense Properties Stock $cdp

$cdp Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-Q Financial Statement

#000086054616000100 Filed on November 04, 2016

Income Statement

Concept	2016 Q4	2016 Q3	2015 Q3
Revenue	$142.0M	$142.1M	$150.7M
YoY Change	-0.93%	-5.73%	-1.48%
Cost Of Revenue	$60.50M	$10.34M	$16.13M
YoY Change	7.46%	-35.9%	-51.98%
Gross Profit	$81.50M	$131.8M	$134.6M
YoY Change	-6.43%	-2.12%	12.72%
Gross Profit Margin	57.4%	92.72%	89.3%
Selling, General & Admin	$7.800M	$8.855M	$7.439M
YoY Change	-8.24%	19.03%	3.16%
% of Gross Profit	9.57%	6.72%	5.53%
Research & Development	$1.700M	$1.700M	$5.600M
YoY Change	-32.0%	-69.64%	300.0%
% of Gross Profit	2.09%	1.29%	4.16%
Depreciation & Amortization	$33.50M	$32.50M	$39.00M
YoY Change	-8.97%	-16.67%	26.62%
% of Gross Profit	41.1%	24.67%	28.97%
Operating Expenses	$42.50M	$8.855M	$7.439M
YoY Change	-10.15%	19.03%	3.16%
Operating Profit	$37.44M	$11.53M	$31.99M
YoY Change	86.7%	-63.98%	-14.51%
Interest Expense	-$16.40M	-$16.30M	-$23.40M
YoY Change	-21.9%	-30.34%	0.0%
% of Operating Profit	-43.8%	-141.43%	-73.14%
Other Income/Expense, Net
YoY Change
Pretax Income	$20.00M	-$5.444M	$94.31M
YoY Change	-1528.57%	-105.77%	591.67%
Income Tax	$300.0K	-$21.00K	$48.00K
% Of Pretax Income	1.5%		0.05%
Net Earnings	$24.73M	$27.30M	$89.80M
YoY Change	-58.34%	-69.6%	295.25%
Net Earnings / Revenue	17.42%	19.21%	59.57%
Basic Earnings Per Share	$0.22	$0.25	$0.91
Diluted Earnings Per Share	$0.22	$0.25	$0.91
COMMON SHARES
Basic Shares Outstanding	94.76M shares	94.43M shares	94.15M shares
Diluted Shares Outstanding		94.51M shares	94.61M shares

Balance Sheet

Concept	2016 Q4	2016 Q3	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$209.9M	$47.60M	$3.800M
YoY Change	248.09%	1152.63%	-90.5%
Cash & Equivalents	$209.9M	$47.57M	$3.840M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory	$94.70M	$161.5M	$150.6M
Prepaid Expenses
Receivables	$34.40M	$25.80M	$20.00M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$339.0M	$234.9M	$174.4M
YoY Change	81.96%	34.69%	189.7%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.204M	$5.492M	$5.941M
YoY Change	-13.32%	-7.56%	-8.98%
Goodwill
YoY Change
Intangibles	$78.35M	$84.08M	$106.2M
YoY Change	-20.32%	-20.81%	119.82%
Long-Term Investments	$2.355M	$25.70M	$1.626M
YoY Change	43.95%	1480.57%	-27.41%
Other Assets	$80.00M	$84.90M	$106.3M
YoY Change	-14.8%	-20.13%	-1.48%
Total Long-Term Assets	$3.442B	$3.399B	$3.738B
YoY Change	-7.55%	-9.05%	3.25%
TOTAL ASSETS
Total Short-Term Assets	$339.0M	$234.9M	$174.4M
Total Long-Term Assets	$3.442B	$3.399B	$3.738B
Total Assets	$3.781B	$3.634B	$3.912B
YoY Change	-3.29%	-7.1%	6.3%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$108.7M	$112.3M	$98.60M
YoY Change	18.41%	13.89%	-20.42%
Accrued Expenses
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	$169.8M	$171.3M	$163.3M
YoY Change	6.73%	4.9%	-11.87%
LONG-TERM LIABILITIES
Long-Term Debt	$1.931B	$1.874B	$2.121B
YoY Change	-7.08%	-11.66%	3.47%
Other Long-Term Liabilities	$62.80M	$65.50M	$34.50M
YoY Change	71.12%	89.86%	19.38%
Total Long-Term Liabilities	$1.993B	$1.939B	$2.156B
YoY Change	-5.73%	-10.04%	3.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$169.8M	$171.3M	$163.3M
Total Long-Term Liabilities	$1.993B	$1.939B	$2.156B
Total Liabilities	$2.163B	$2.111B	$2.319B
YoY Change	-4.85%	-8.99%	2.42%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$985.0K	$948.0K	$945.0K
YoY Change	4.23%	0.32%	7.75%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.523B	$1.433B	$1.510B
YoY Change
Total Liabilities & Shareholders Equity	$3.781B	$3.634B	$3.918B
YoY Change	-3.29%	-7.25%	6.47%

Cashflow Statement

Concept	2016 Q4	2016 Q3	2015 Q3
OPERATING ACTIVITIES
Net Income	$24.73M	$27.30M	$89.80M
YoY Change	-58.34%	-69.6%	295.25%
Depreciation, Depletion And Amortization	$33.50M	$32.50M	$39.00M
YoY Change	-8.97%	-16.67%	26.62%
Cash From Operating Activities	$62.50M	$45.60M	$24.90M
YoY Change	11.01%	83.13%	-39.56%
INVESTING ACTIVITIES
Capital Expenditures	-$52.70M	-$63.20M	-$134.7M
YoY Change	-35.57%	-53.08%	136.32%
Acquisitions
YoY Change
Other Investing Activities	$46.30M	$245.3M	$24.50M
YoY Change	-68.16%	901.22%	-59.17%
Cash From Investing Activities	-$6.500M	$182.1M	-$110.3M
YoY Change	-110.19%	-265.1%	-3776.67%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	106.2M	-193.4M	52.10M
YoY Change	-267.24%	-471.21%	-164.72%
NET CHANGE
Cash From Operating Activities	62.50M	45.60M	24.90M
Cash From Investing Activities	-6.500M	182.1M	-110.3M
Cash From Financing Activities	106.2M	-193.4M	52.10M
Net Change In Cash	162.2M	34.30M	-33.30M
YoY Change	186.57%	-203.0%	-8.26%
FREE CASH FLOW
Cash From Operating Activities	$62.50M	$45.60M	$24.90M
Capital Expenditures	-$52.70M	-$63.20M	-$134.7M
Free Cash Flow	$115.2M	$108.8M	$159.6M
YoY Change	-16.58%	-31.83%	62.53%

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	2016
	dei	Document Period End Date DocumentPeriodEndDate	2016-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000860546
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	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	CORPORATE OFFICE PROPERTIES TRUST
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	ofc	Adjustmentto Equityto Arriveat Fair Valueof Redeemable Noncontrolling Interest AdjustmenttoEquitytoArriveatFairValueofRedeemableNoncontrollingInterest	-516000	USD
CY2015Q4	ofc	Advance Rent And Security Deposit Liability AdvanceRentAndSecurityDepositLiability	37148000	USD
CY2016Q3	ofc	Advance Rent And Security Deposit Liability AdvanceRentAndSecurityDepositLiability	28740000	USD
CY2015Q4	ofc	Allowancefor Doubtful Accounts Deferred Rent AllowanceforDoubtfulAccountsDeferredRent	1962000	USD
CY2016Q3	ofc	Allowancefor Doubtful Accounts Deferred Rent AllowanceforDoubtfulAccountsDeferredRent	330000	USD
CY2015Q3	ofc	Amount Of Dilutive Effect Of Common Units On Diluted Earnings Per Share From Continuing Operations AmountOfDilutiveEffectOfCommonUnitsOnDilutedEarningsPerShareFromContinuingOperations	0	USD
	ofc	Amount Of Dilutive Effect Of Common Units On Diluted Earnings Per Share From Continuing Operations AmountOfDilutiveEffectOfCommonUnitsOnDilutedEarningsPerShareFromContinuingOperations	4225000	USD
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	ofc	Amount Of Dilutive Effect Of Common Units On Diluted Earnings Per Share From Continuing Operations AmountOfDilutiveEffectOfCommonUnitsOnDilutedEarningsPerShareFromContinuingOperations	0	USD
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	ofc	Decreasein Redeemable Noncontrolling Interestsin Connectionwith Distribution Payableto Redeemable Noncontrolling Interest DecreaseinRedeemableNoncontrollingInterestsinConnectionwithDistributionPayabletoRedeemableNoncontrollingInterest	6683000	USD
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.20
	us-gaap	Contribution Of Property ContributionOfProperty	0	USD
	ofc	Disposal Group Including Discontinued Operation Property Operating Expense DisposalGroupIncludingDiscontinuedOperationPropertyOperatingExpense	6000	USD
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	ofc	Business Development Expenses And Land Carry Costs BusinessDevelopmentExpensesAndLandCarryCosts	6497000	USD
	ofc	Comprehensive Income Loss Net Of Tax After Redeemable Noncontrolling Interest Adjustments ComprehensiveIncomeLossNetOfTaxAfterRedeemableNoncontrollingInterestAdjustments	120044000	USD
	ofc	Comprehensive Income Loss Net Of Tax After Redeemable Noncontrolling Interest Adjustments ComprehensiveIncomeLossNetOfTaxAfterRedeemableNoncontrollingInterestAdjustments	-26629000	USD
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	ofc	Construction Contract And Other Service Expenses ConstructionContractAndOtherServiceExpenses	94923000	USD
CY2016Q3	ofc	Construction Contract And Other Service Expenses ConstructionContractAndOtherServiceExpenses	10341000	USD
	ofc	Construction Contract And Other Service Expenses ConstructionContractAndOtherServiceExpenses	32513000	USD
	ofc	Construction Contract And Other Service Expenses Paid ConstructionContractAndOtherServiceExpensesPaid	112614000	USD
	ofc	Construction Contract And Other Service Expenses Paid ConstructionContractAndOtherServiceExpensesPaid	33169000	USD
	ofc	Construction Contract And Other Service Revenues Received ConstructionContractAndOtherServiceRevenuesReceived	104817000	USD
	ofc	Construction Contract And Other Service Revenues Received ConstructionContractAndOtherServiceRevenuesReceived	54399000	USD
	ofc	Decrease In Debt In Connection With Surrender Of Property In Settlement Of Debt DecreaseInDebtInConnectionWithSurrenderOfPropertyInSettlementOfDebt	150000000	USD
	ofc	Decrease In Debt In Connection With Surrender Of Property In Settlement Of Debt DecreaseInDebtInConnectionWithSurrenderOfPropertyInSettlementOfDebt	0	USD
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	ofc	Decreasein Debtin Connection With Partial Saleof Properties DecreaseinDebtinConnectionWithPartialSaleofProperties	59534000	USD
	ofc	Decreasein Propertyin Connectionwith Surrender Property Debt Settlement DecreaseinPropertyinConnectionwithSurrenderPropertyDebtSettlement	-82738000	USD
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	ofc	Decreasein Redeemable Noncontrolling Interestsin Connectionwith Distribution Payableto Redeemable Noncontrolling Interest DecreaseinRedeemableNoncontrollingInterestsinConnectionwithDistributionPayabletoRedeemableNoncontrollingInterest	0	USD
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	ofc	Depreciation And Amortization For Real Estate Operations DepreciationAndAmortizationForRealEstateOperations	103788000	USD
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	ofc	Depreciation And Amortization For Real Estate Operations DepreciationAndAmortizationForRealEstateOperations	99790000	USD
	ofc	Dilutive Securities Effectof Common Units DilutiveSecuritiesEffectofCommonUnits	4231000	USD
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	ofc	Dilutive Securities Effectof Common Units DilutiveSecuritiesEffectofCommonUnits	0	USD
CY2015Q3	ofc	Disposal Group Including Discontinued Operation Operating Income Loss Excluding Depreciation And Amortization DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLossExcludingDepreciationAndAmortization	0	USD
	ofc	Disposal Group Including Discontinued Operation Operating Income Loss Excluding Depreciation And Amortization DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLossExcludingDepreciationAndAmortization	-10000	USD
CY2016Q3	ofc	Disposal Group Including Discontinued Operation Operating Income Loss Excluding Depreciation And Amortization DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLossExcludingDepreciationAndAmortization	0	USD
	ofc	Disposal Group Including Discontinued Operation Operating Income Loss Excluding Depreciation And Amortization DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLossExcludingDepreciationAndAmortization	0	USD
CY2015Q3	ofc	Disposal Group Including Discontinued Operation Property Operating Expense DisposalGroupIncludingDiscontinuedOperationPropertyOperatingExpense	0	USD
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	ofc	Disposal Group Including Discontinued Operation Property Operating Expense DisposalGroupIncludingDiscontinuedOperationPropertyOperatingExpense	0	USD
	ofc	Equity Change Adjustments To Additional Paid In Capital Reallocation Of Minority Interest EquityChangeAdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest	591000	USD
	ofc	Equity Change Adjustments To Additional Paid In Capital Reallocation Of Minority Interest EquityChangeAdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest	42000	USD
	ofc	Equity Change Stock Issued During Period Value Conversion Of Units EquityChangeStockIssuedDuringPeriodValueConversionOfUnits	2151000	USD
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	ofc	Equityin Other Comprehensive Income Lossofan Equity Method Investee EquityinOtherComprehensiveIncomeLossofanEquityMethodInvestee	-264000	USD
	ofc	Equityin Other Comprehensive Income Lossofan Equity Method Investee EquityinOtherComprehensiveIncomeLossofanEquityMethodInvestee	-184000	USD
	ofc	Extinguishmentof Debt Noncash Gain Loss ExtinguishmentofDebtNoncashGainLoss	-86075000	USD
	ofc	Extinguishmentof Debt Noncash Gain Loss ExtinguishmentofDebtNoncashGainLoss	34000	USD
	ofc	Generaland Administrative Leasing Business Developmentand Land Carry Paid GeneralandAdministrativeLeasingBusinessDevelopmentandLandCarryPaid	29620000	USD
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CY2015Q3	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	0	USD
	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	0	USD
CY2016Q3	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	415000	USD
	ofc	Income Lossfrom Equity Method Investments Allocableto Depreciation Amortizationand Interest Expense IncomeLossfromEquityMethodInvestmentsAllocabletoDepreciationAmortizationandInterestExpense	415000	USD
CY2015Q3	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	18000	USD
	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	52000	USD
CY2016Q3	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	1000	USD
	ofc	Income Lossin Non Real Estate Equity Method Investments IncomeLossinNonRealEstateEquityMethodInvestments	21000	USD
	ofc	Increase Decrease In Accrued Capital Improvements Leasing And Other Investing Activity Costs IncreaseDecreaseInAccruedCapitalImprovementsLeasingAndOtherInvestingActivityCosts	-11722000	USD
	ofc	Increase Decrease In Accrued Capital Improvements Leasing And Other Investing Activity Costs IncreaseDecreaseInAccruedCapitalImprovementsLeasingAndOtherInvestingActivityCosts	9963000	USD
	ofc	Increase Decrease In Advance Rent And Security Deposit Liability IncreaseDecreaseInAdvanceRentAndSecurityDepositLiability	3763000	USD
	ofc	Increase Decrease In Advance Rent And Security Deposit Liability IncreaseDecreaseInAdvanceRentAndSecurityDepositLiability	-8408000	USD
	ofc	Increase Decrease In Fair Value Of Derivatives Applied To Aocl And Noncontrolling Interests IncreaseDecreaseInFairValueOfDerivativesAppliedToAoclAndNoncontrollingInterests	-4263000	USD
	ofc	Increase Decrease In Fair Value Of Derivatives Applied To Aocl And Noncontrolling Interests IncreaseDecreaseInFairValueOfDerivativesAppliedToAoclAndNoncontrollingInterests	-13817000	USD
	ofc	Increase Decrease In Marketable Securities And Restricted Cash IncreaseDecreaseInMarketableSecuritiesAndRestrictedCash	1102000	USD
	ofc	Increase Decrease In Marketable Securities And Restricted Cash IncreaseDecreaseInMarketableSecuritiesAndRestrictedCash	-18000	USD
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	ofc	Incremental Common Shares Attributable To Conversion Of Common Units IncrementalCommonSharesAttributableToConversionOfCommonUnits	3697000	shares
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	ofc	Interest And Other Income Received InterestAndOtherIncomeReceived	4130000	USD
	ofc	Interest And Other Income Received InterestAndOtherIncomeReceived	472000	USD
CY2016Q3	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	47000	USD
	ofc	Minority Interest Decrease From Distributions Including Joint Ventures MinorityInterestDecreaseFromDistributionsIncludingJointVentures	12000	USD
	ofc	Minority Interest Decrease From Distributions To Operating Partnership Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToOperatingPartnershipNoncontrollingInterestHolders	3530000	USD
	ofc	Minority Interest Decrease From Distributions To Operating Partnership Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToOperatingPartnershipNoncontrollingInterestHolders	3498000	USD
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	ofc	Minority Interest In Net Income Loss Other Including Joint Ventures Minority Interests MinorityInterestInNetIncomeLossOtherIncludingJointVenturesMinorityInterests	2599000	USD
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	ofc	Net Income Loss Attributableto Common Stockholders Basic NetIncomeLossAttributabletoCommonStockholdersBasic	107804000	USD
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	ofc	Net Income Loss Attributableto Common Stockholders Basic NetIncomeLossAttributabletoCommonStockholdersBasic	-24270000	USD
CY2015Q3	ofc	Net Income Loss From Continuing Operations Available To Common Stockholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonStockholdersBasic	85879000	USD
	ofc	Net Income Loss From Continuing Operations Available To Common Stockholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonStockholdersBasic	107651000	USD
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	ofc	Net Income Loss From Continuing Operations Available To Common Stockholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonStockholdersBasic	-24270000	USD
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	ofc	Net Income Lossfrom Continuing Operations Availableto Common Stockholders Diluted NetIncomeLossfromContinuingOperationsAvailabletoCommonStockholdersDiluted	111876000	USD
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	ofc	Net Income Lossfrom Continuing Operations Availableto Common Stockholders Diluted NetIncomeLossfromContinuingOperationsAvailabletoCommonStockholdersDiluted	-24270000	USD
CY2015Q3	ofc	Net Operating Income Loss From Service Operations NetOperatingIncomeLossFromServiceOperations	926000	USD
	ofc	Net Operating Income Loss From Service Operations NetOperatingIncomeLossFromServiceOperations	2631000	USD
CY2016Q3	ofc	Net Operating Income Loss From Service Operations NetOperatingIncomeLossFromServiceOperations	808000	USD
	ofc	Net Operating Income Loss From Service Operations NetOperatingIncomeLossFromServiceOperations	1859000	USD
	ofc	Noncashor Part Noncash Disposition Decreasein Propertyin Connection With Partial Saleof Properties Net NoncashorPartNoncashDispositionDecreaseinPropertyinConnectionWithPartialSaleofPropertiesNet	0	USD
	ofc	Noncashor Part Noncash Disposition Decreasein Propertyin Connection With Partial Saleof Properties Net NoncashorPartNoncashDispositionDecreaseinPropertyinConnectionWithPartialSaleofPropertiesNet	-114597000	USD
	ofc	Noncashor Part Noncash Disposition Other Net Decreasesin Assetsand Liabilitiesin Connection With Partial Saleof Properties NoncashorPartNoncashDispositionOtherNetDecreasesinAssetsandLiabilitiesinConnectionWithPartialSaleofProperties	0	USD
	ofc	Noncashor Part Noncash Disposition Other Net Decreasesin Assetsand Liabilitiesin Connection With Partial Saleof Properties NoncashorPartNoncashDispositionOtherNetDecreasesinAssetsandLiabilitiesinConnectionWithPartialSaleofProperties	3619000	USD
	ofc	Noncontrolling Interest Increasefrom Contributions NoncontrollingInterestIncreasefromContributions	0	USD
	ofc	Noncontrolling Interest Increasefrom Contributions NoncontrollingInterestIncreasefromContributions	22779000	USD
	ofc	Numberof Joint Ventures With Redeemable Noncontrolling Interests NumberofJointVenturesWithRedeemableNoncontrollingInterests	2	joint_venture
	ofc	Paymentsof Distributions Redeemable Noncontrolling Interest PaymentsofDistributionsRedeemableNoncontrollingInterest	0	USD
	ofc	Paymentsof Distributions Redeemable Noncontrolling Interest PaymentsofDistributionsRedeemableNoncontrollingInterest	14329000	USD
	ofc	Property Operating Expenses Paid PropertyOperatingExpensesPaid	146274000	USD
	ofc	Property Operating Expenses Paid PropertyOperatingExpensesPaid	154203000	USD
CY2016Q3	ofc	Property Subjectto Environmental Indemnity Numberof Properties PropertySubjecttoEnvironmentalIndemnityNumberofProperties	3	Property
	ofc	Redeemable Noncontrolling Interest Equity Net Income Loss Attributableto Noncontrolling Interest RedeemableNoncontrollingInterestEquityNetIncomeLossAttributabletoNoncontrollingInterest	1690000	USD
	ofc	Redeemable Noncontrolling Interest Equity Net Income Loss Attributableto Noncontrolling Interest RedeemableNoncontrollingInterestEquityNetIncomeLossAttributabletoNoncontrollingInterest	1679000	USD
CY2015Q4	ofc	Restricted Cash And Marketable Securities RestrictedCashAndMarketableSecurities	7716000	USD
CY2016Q3	ofc	Restricted Cash And Marketable Securities RestrictedCashAndMarketableSecurities	7583000	USD
	ofc	Revenues From Real Estate Operations Received RevenuesFromRealEstateOperationsReceived	373607000	USD
	ofc	Revenues From Real Estate Operations Received RevenuesFromRealEstateOperationsReceived	391511000	USD
	ofc	Scheduled Principal Amortization Repayments Of Long Term Debt ScheduledPrincipalAmortizationRepaymentsOfLongTermDebt	5011000	USD
	ofc	Scheduled Principal Amortization Repayments Of Long Term Debt ScheduledPrincipalAmortizationRepaymentsOfLongTermDebt	4454000	USD
CY2015Q3	ofc	Segment Reporting Direct Costs Of Leased And Rented Property Or Equipment SegmentReportingDirectCostsOfLeasedAndRentedPropertyOrEquipment	48897000	USD
	ofc	Segment Reporting Direct Costs Of Leased And Rented Property Or Equipment SegmentReportingDirectCostsOfLeasedAndRentedPropertyOrEquipment	145990000	USD
CY2016Q3	ofc	Segment Reporting Direct Costs Of Leased And Rented Property Or Equipment SegmentReportingDirectCostsOfLeasedAndRentedPropertyOrEquipment	49952000	USD
	ofc	Segment Reporting Direct Costs Of Leased And Rented Property Or Equipment SegmentReportingDirectCostsOfLeasedAndRentedPropertyOrEquipment	149968000	USD
CY2015Q3	ofc	Segment Reporting Operating Income SegmentReportingOperatingIncome	84789000	USD
	ofc	Segment Reporting Operating Income SegmentReportingOperatingIncome	238601000	USD
CY2016Q3	ofc	Segment Reporting Operating Income SegmentReportingOperatingIncome	82010000	USD
	ofc	Segment Reporting Operating Income SegmentReportingOperatingIncome	249005000	USD
CY2015Q3	ofc	Segment Reporting Transfers From Non Operating Properties SegmentReportingTransfersFromNonOperatingProperties	142210000	USD
	ofc	Segment Reporting Transfers From Non Operating Properties SegmentReportingTransfersFromNonOperatingProperties	304106000	USD
CY2016Q3	ofc	Segment Reporting Transfers From Non Operating Properties SegmentReportingTransfersFromNonOperatingProperties	34291000	USD
	ofc	Segment Reporting Transfers From Non Operating Properties SegmentReportingTransfersFromNonOperatingProperties	154732000	USD
	ofc	Stock Issued During Period Value New Issuesfor Other Program StockIssuedDuringPeriodValueNewIssuesforOtherProgram	26535000	USD
CY2015Q3	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	0	USD
	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	0	USD
CY2016Q3	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	1008000	USD
	ofc	Unconsolidated Joint Venture Net Operating Income Allocableto Parent UnconsolidatedJointVentureNetOperatingIncomeAllocabletoParent	1008000	USD
CY2015Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	91755000	USD
CY2016Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	112306000	USD
CY2015Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	29167000	USD
CY2016Q3	us-gaap	Accounts Receivable Net AccountsReceivableNet	25790000	USD
CY2015Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	657172000	USD
CY2016Q3	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	759262000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2838000	USD
CY2016Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-16314000	USD
CY2015Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2004507000	USD
CY2016Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2008787000	USD
	us-gaap	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet	-319000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5600000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6177000	USD
	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	5000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1525000	USD
CY2016Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	612000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	4144000	USD
	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	4456000	USD
CY2015Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	2307000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	3545000	USD
CY2016Q3	us-gaap	Asset Impairment Charges AssetImpairmentCharges	27699000	USD
	us-gaap	Asset Impairment Charges AssetImpairmentCharges	99837000	USD
CY2015Q3	us-gaap	Assets Assets	3912092000	USD
CY2015Q4	us-gaap	Assets Assets	3909312000	USD
CY2016Q3	us-gaap	Assets Assets	3634194000	USD
CY2015Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	96782000	USD
CY2016Q3	us-gaap	Assets Of Disposal Group Including Discontinued Operation AssetsOfDisposalGroupIncludingDiscontinuedOperation	161454000	USD
CY2015Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.94
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.20
CY2015Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.94
CY2015Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	88836000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	112941000	USD
CY2015Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	152736000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	498657000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6077000	USD
CY2015Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3840000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	60310000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47574000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-2237000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-12736000	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2015Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.275
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.825
CY2016Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2750
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.825
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000	shares
CY2016Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000	shares
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	94531512	shares
CY2016Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	94764786	shares
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93255284	shares
CY2015Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	94533670	shares
	us-gaap	Contracts Revenue ContractsRevenue	34372000	USD
CY2015Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	38403000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	103788000	USD
CY2016Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	32015000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	99790000	USD
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	94531512	shares
CY2016Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	94764786	shares
CY2015Q4	us-gaap	Common Stock Value CommonStockValue	945000	USD
CY2016Q3	us-gaap	Common Stock Value CommonStockValue	948000	USD
CY2015Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	87118000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	114410000	USD
CY2016Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	28697000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-26770000	USD
CY2015Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4453000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	7324000	USD
CY2016Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	2025000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	1820000	USD
CY2015Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	91571000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	121734000	USD
CY2016Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	30722000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-24950000	USD
CY2015Q3	us-gaap	Contracts Revenue ContractsRevenue	17058000	USD
	us-gaap	Contracts Revenue ContractsRevenue	97554000	USD
CY2016Q3	us-gaap	Contracts Revenue ContractsRevenue	11149000	USD
	us-gaap	Contribution Of Property ContributionOfProperty	22600000	USD
CY2015Q3	us-gaap	Cost Of Services CostOfServices	16132000	USD
	us-gaap	Cost Of Services CostOfServices	94923000	USD
CY2016Q3	us-gaap	Cost Of Services CostOfServices	10341000	USD
	us-gaap	Cost Of Services CostOfServices	32513000	USD
CY2015Q3	us-gaap	Costs And Expenses CostsAndExpenses	118751000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	382102000	USD
CY2016Q3	us-gaap	Costs And Expenses CostsAndExpenses	130578000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	417369000	USD
CY2015Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	3261000	USD
CY2016Q3	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	6367000	USD
	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	6000000	USD
CY2015Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	66364000	USD
CY2016Q3	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	62767000	USD
CY2015Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	53868000	USD
CY2016Q3	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	41470000	USD
CY2015Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	5867000	USD
CY2016Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	3812000	USD
CY2015Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	105484000	USD
CY2016Q3	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	87526000	USD
CY2015Q4	us-gaap	Deferred Revenue Leases Net DeferredRevenueLeasesNet	19758000	USD
CY2016Q3	us-gaap	Deferred Revenue Leases Net DeferredRevenueLeasesNet	9898000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3467000	USD
CY2016Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3282000	USD
	us-gaap	Dividends Dividends	88658000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-347000	USD
	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	4000000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	105397000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	101429000	USD
	us-gaap	Dividends Dividends	88796000	USD
CY2015Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	30182000	USD
CY2015Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	30178000	USD
CY2016Q3	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	30225000	USD
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.91
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
	us-gaap	Gain Loss On Sale Of Properties GainLossOnSaleOfProperties	34101000	USD
CY2015Q3	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	15000	USD
CY2015Q4	us-gaap	Development In Process DevelopmentInProcess	429219000	USD
CY2016Q3	us-gaap	Development In Process DevelopmentInProcess	396269000	USD
CY2015Q3	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	372000	USD
	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
CY2016Q3	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
CY2015Q3	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	48897000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	145996000	USD
CY2016Q3	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	49952000	USD
	us-gaap	Direct Costs Of Leased And Rented Property Or Equipment DirectCostsOfLeasedAndRentedPropertyOrEquipment	149968000	USD
CY2015Q3	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	4000	USD
CY2016Q3	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	0	USD
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.26
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.91
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.15
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.26
CY2016Q3	us-gaap	Equity Method Investment Difference Between Carrying Amount And Underlying Equity EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity	18500000	USD
CY2016Q3	us-gaap	Equity Method Investments EquityMethodInvestments	25700000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	USD
	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	4000000	USD
CY2016Q3	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	34101000	USD
	us-gaap	Gain Loss On Sale Of Properties Net Of Applicable Income Taxes GainLossOnSaleOfPropertiesNetOfApplicableIncomeTaxes	34101000	USD
CY2015Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	85745000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	85677000	USD
CY2016Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-59000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-37000	USD
CY2016Q3	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	1300000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	3779000	USD
	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	99797000	USD
CY2015Q4	us-gaap	Incentive To Lessee IncentiveToLessee	11133000	USD
CY2016Q3	us-gaap	Incentive To Lessee IncentiveToLessee	19106000	USD
CY2015Q3	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	94279000	USD
	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	122261000	USD
CY2016Q3	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	-4829000	USD
	us-gaap	Income Loss Before Gain Or Loss On Sale Of Properties Extraordinary Items And Cumulative Effects Of Accounting Changes IncomeLossBeforeGainOrLossOnSaleOfPropertiesExtraordinaryItemsAndCumulativeEffectsOfAccountingChanges	-45049000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	89800000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.91
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.15
CY2016Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.25
	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.26
CY2015Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.91
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.15
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	153000	USD
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	118783000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	27299000	USD
	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-13294000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	4494000	USD
	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	7322000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	1973000	USD
	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	2346000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	94309000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	122206000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-5444000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-45691000	USD
CY2015Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	94279000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	122105000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-4829000	USD
	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-45049000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.25
	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.26
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	156000	USD
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	USD
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	3000	USD
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	USD
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2015Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2016Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
CY2015Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	18000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	52000	USD
CY2016Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	594000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	614000	USD
CY2015Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	48000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	153000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-21000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-28000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6526000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-3658000	USD
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-655000	USD
	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	31523000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5228000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	19778000	USD
CY2015Q3	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	434000	shares
	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2016Q3	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2015Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	21000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	82000	shares
CY2016Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	81000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2015Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	98338000	USD
CY2016Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	84081000	USD
CY2015Q3	us-gaap	Interest And Debt Expense InterestAndDebtExpense	24121000	USD
	us-gaap	Interest And Debt Expense InterestAndDebtExpense	66727000	USD
CY2016Q3	us-gaap	Interest And Debt Expense InterestAndDebtExpense	18301000	USD
	us-gaap	Interest And Debt Expense InterestAndDebtExpense	64499000	USD
CY2015Q3	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1500000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	5600000	USD
CY2016Q3	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1200000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4300000	USD
	us-gaap	Interest Paid Net InterestPaidNet	46278000	USD
	us-gaap	Interest Paid Net InterestPaidNet	61662000	USD
CY2015Q4	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	3160000	USD
CY2016Q3	us-gaap	Interest Rate Derivative Liabilities At Fair Value InterestRateDerivativeLiabilitiesAtFairValue	17272000	USD
CY2015Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2016Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	25721000	USD
CY2015Q4	us-gaap	Liabilities Liabilities	2273530000	USD
CY2016Q3	us-gaap	Liabilities Liabilities	2110559000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3909312000	USD
CY2016Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3634194000	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	2077752000	USD
CY2016Q3	us-gaap	Long Term Debt LongTermDebt	1873836000	USD
CY2015Q4	us-gaap	Minority Interest MinorityInterest	72039000	USD
CY2016Q3	us-gaap	Minority Interest MinorityInterest	67545000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	599000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	516000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	1098000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	21344000	USD
CY2015Q4	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	52359000	USD
CY2016Q3	us-gaap	Minority Interest In Operating Partnerships MinorityInterestInOperatingPartnerships	46757000	USD
CY2015Q4	us-gaap	Minority Interest In Preferred Unit Holders MinorityInterestInPreferredUnitHolders	8800000	USD
CY2016Q3	us-gaap	Minority Interest In Preferred Unit Holders MinorityInterestInPreferredUnitHolders	8800000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	221310000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-260626000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-371289000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	77917000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	147742000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	169973000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	89800000	USD
	us-gaap	Net Income Loss NetIncomeLoss	118936000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	27299000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-13294000	USD
CY2015Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86248000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	108279000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	23747000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-23951000	USD
CY2015Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	86251000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	112035000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	23642000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-24270000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	55490000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Debt Assumed1 NoncashOrPartNoncashAcquisitionDebtAssumed1	0	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	5265000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	0	USD
CY2015Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	3357000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	4231000	USD
CY2016Q3	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	901000	USD
	us-gaap	Noncontrolling Interest In Net Income Loss Operating Partnerships Nonredeemable NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable	-948000	USD
CY2015Q3	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
CY2016Q3	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
CY2015Q4	us-gaap	Notes Receivable Net NotesReceivableNet	47875000	USD
CY2016Q3	us-gaap	Notes Receivable Net NotesReceivableNet	51119000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	31993000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	100039000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	11525000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	14968000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	91556000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1089000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1082000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1113000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1159000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	86806000	USD
CY2016Q3	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	307000	USD
CY2015Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	109080000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	312826000	USD
CY2016Q3	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	103956000	USD
	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	316862000	USD
CY2015Q4	us-gaap	Other Assets OtherAssets	7283000	USD
CY2016Q3	us-gaap	Other Assets OtherAssets	6727000	USD
CY2015Q3	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	-264000	USD
CY2016Q3	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	-184000	USD
CY2015Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2723000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4527000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1450000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-14002000	USD
CY2015Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-915000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2457000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1043000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2763000	USD
CY2015Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-3638000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-6720000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	407000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-16581000	USD
CY2015Q4	us-gaap	Other Liabilities OtherLiabilities	13779000	USD
CY2016Q3	us-gaap	Other Liabilities OtherLiabilities	38282000	USD
CY2015Q4	us-gaap	Other Minority Interests OtherMinorityInterests	10880000	USD
CY2016Q3	us-gaap	Other Minority Interests OtherMinorityInterests	11988000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1922000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2761000	USD
CY2015Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	692000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3217000	USD
CY2016Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1391000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3877000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-26000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	504000	USD
CY2015Q3	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	24606000	USD
	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	71761000	USD
CY2016Q3	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	26998000	USD
	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	81103000	USD
CY2015Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	369000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	475000	USD
CY2016Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	105000	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	319000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	12610000	USD
	us-gaap	Payments For Capital Improvements PaymentsForCapitalImprovements	22063000	USD
	us-gaap	Payments For Leasing Costs PaymentsForLeasingCosts	8603000	USD
	us-gaap	Payments For Leasing Costs PaymentsForLeasingCosts	6024000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4827000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	991000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2330000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2179000	USD
	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	18129000	USD
	us-gaap	Payments For Tenant Improvements PaymentsForTenantImprovements	26055000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	77641000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	78072000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	3581000	USD
	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	3476000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	10657000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	10657000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	5377000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	825000	USD
	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	202866000	USD
	us-gaap	Payments To Acquire Commercial Real Estate PaymentsToAcquireCommercialRealEstate	0	USD
	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	174434000	USD
	us-gaap	Payments To Develop Real Estate Assets PaymentsToDevelopRealEstateAssets	121297000	USD
CY2015Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3552000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	10657000	USD
CY2016Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3552000	USD
	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	10657000	USD
CY2015Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	199083000	USD
CY2016Q3	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	199083000	USD
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2016Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000	shares
CY2015Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	7431667	shares
CY2016Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	7431667	shares
CY2015Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	7431667	shares
CY2016Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	7431667	shares
CY2015Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	60024000	USD
CY2016Q3	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	73538000	USD
CY2015Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	23009000	USD
CY2016Q3	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	28752000	USD
	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	5114000	USD
	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	USD
	us-gaap	Proceeds From Divestiture Of Real Estate Partnership ProceedsFromDivestitureOfRealEstatePartnership	0	USD
	us-gaap	Proceeds From Divestiture Of Real Estate Partnership ProceedsFromDivestitureOfRealEstatePartnership	43686000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	28567000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-46000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	50000000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	105000000	USD
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	296580000	USD
	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	422000000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	362500000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2559000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5032000	USD
	us-gaap	Proceeds From Sale Of Land Heldforinvestment ProceedsFromSaleOfLandHeldforinvestment	5700000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	45066000	USD
	us-gaap	Proceeds From Sale Of Real Estate Heldforinvestment ProceedsFromSaleOfRealEstateHeldforinvestment	210661000	USD
CY2015Q3	us-gaap	Profit Loss ProfitLoss	94294000	USD
	us-gaap	Profit Loss ProfitLoss	126261000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	29272000	USD
	us-gaap	Profit Loss ProfitLoss	-10948000	USD
CY2015Q3	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	141037000	USD
	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	307723000	USD
CY2016Q3	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	22232000	USD
	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	51655000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6004000	USD
CY2016Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5492000	USD
CY2015Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	700363000	USD
CY2016Q3	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	681476000	USD
CY2015Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	3349748000	USD
CY2016Q3	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	3028338000	USD
CY2015Q3	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	133686000	USD
	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	384591000	USD
CY2016Q3	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	130954000	USD
	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	397965000	USD
CY2015Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	19218000	USD
CY2016Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	22848000	USD
CY2014Q4	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	18417000	USD
CY2015Q3	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	19608000	USD
CY2015Q4	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	19218000	USD
CY2016Q3	us-gaap	Redeemable Noncontrolling Interest Equity Fair Value RedeemableNoncontrollingInterestEquityFairValue	22848000	USD
CY2015Q4	us-gaap	Rental Properties RentalProperties	2920529000	USD
CY2016Q3	us-gaap	Rental Properties RentalProperties	2632069000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	418000000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	406000000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	50681000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	203056000	USD
CY2015Q3	us-gaap	Revenues Revenues	150744000	USD
	us-gaap	Revenues Revenues	482141000	USD
CY2016Q3	us-gaap	Revenues Revenues	142103000	USD
	us-gaap	Revenues Revenues	432337000	USD
CY2015Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	7439000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	22864000	USD
CY2016Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	8855000	USD
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	28764000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	4949000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	5637000	USD
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	160160	shares
	us-gaap	Stock Issued During Period Shares Conversion Of Units StockIssuedDuringPeriodSharesConversionOfUnits	87000	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	151511	shares
	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	146274	shares
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	76474	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 Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2008000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2330000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2179000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	1544525000	USD
CY2016Q3	us-gaap	Stockholders Equity StockholdersEquity	1433242000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1520884000	USD
CY2015Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1579907000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1616564000	USD
CY2016Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1500787000	USD
	us-gaap	Straight Line Rent StraightLineRent	11939000	USD
	us-gaap	Straight Line Rent StraightLineRent	930000	USD
CY2015Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94608000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97609000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94514000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	94312000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94153000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	93830000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94433000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94312000	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 United States Government agencies and their 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 complementary portfolio of traditional office properties located in select urban/urban-like submarkets within our regional footprint with durable Class-A office fundamentals and characteristics, as well as other properties supporting general commercial office tenants (“Regional Office”). As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">September 30, 2016</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%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">168</font><font style="font-family:inherit;font-size:10pt;"> operating office properties totaling </font><font style="font-family:inherit;font-size:10pt;">17.5 million</font><font style="font-family:inherit;font-size:10pt;"> square feet, including </font><font style="font-family:inherit;font-size:10pt;">12</font><font style="font-family:inherit;font-size:10pt;"> triple-net leased, single-tenant data center properties. We owned </font><font style="font-family:inherit;font-size:10pt;">six</font><font style="font-family:inherit;font-size:10pt;"> of these properties 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%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">10</font><font style="font-family:inherit;font-size:10pt;"> office properties under, or contractually committed for, construction or redevelopment that we estimate will total approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">1.2 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</font></div></td></tr></table><div style="line-height:120%;padding-left:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">included above and </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;"> properties completed but held for future lease to the United States Government;</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%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">1,358</font><font style="font-family:inherit;font-size:10pt;"> acres of land we control that we believe could be developed into approximately </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">16.2 million</font><font style="font-family:inherit;font-size:10pt;"> square feet; 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%;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><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 both 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;color:#000000;text-decoration:none;">September 30, 2016</font><font style="font-family:inherit;font-size:10pt;">, COPT owned </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">96.3%</font><font style="font-family:inherit;font-size:10pt;"> of the outstanding COPLP common units (“common units”) and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">95.5%</font><font style="font-family:inherit;font-size:10pt;"> of the outstanding COPLP preferred units (“preferred units”); the remaining common and preferred units in COPLP were owned by third parties. Common units in COPLP not owned by COPT carry certain redemption rights. The number of common units in COPLP owned by COPT is equivalent to the number of outstanding common shares of beneficial interest (“common shares”) of COPT, and the entitlement of all COPLP common units to quarterly distributions and payments in liquidation is substantially the same as those of COPT common shareholders. Similarly, in the case of each series of preferred units in COPLP 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, and although, as a partnership, 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>

Files In Submission

Name	View Source	Status
0000860546-16-000100-index-headers.html	Edgar Link	pending
0000860546-16-000100-index.html	Edgar Link	pending
0000860546-16-000100.txt	Edgar Link	pending
0000860546-16-000100-xbrl.zip	Edgar Link	pending
copt09302016ex102.htm	Edgar Link	pending
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copt10q09302016document.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
ofc-20160930.xml	Edgar Link	completed
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$CDP
COPT Defense Properties Stock $cdp

2016 Q4 Form 10-Q Financial Statement

#000086054616000100 Filed on November 04, 2016

Income Statement

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$CDP COPT Defense Properties Stock $cdp

2016 Q4 Form 10-Q Financial Statement

#000086054616000100 Filed on November 04, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CDP
COPT Defense Properties Stock $cdp