3.7.0.1 html 627 504 1 true 217 0 false 10 false false R1.htm 00090 - Document - Document And Entity Information Sheet http://www.mack-cali.com/role/DocumentDocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 00100 - Statement - Consolidated Balance Sheets Sheet http://www.mack-cali.com/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 00105 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.mack-cali.com/role/StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - Consolidated Statements Of Operations Sheet http://www.mack-cali.com/role/StatementConsolidatedStatementsOfOperations Consolidated Statements Of Operations Statements 4 false false R5.htm 00300 - Statement - Consolidated Statements Of Comprehensive Income Sheet http://www.mack-cali.com/role/StatementConsolidatedStatementsOfComprehensiveIncome Consolidated Statements Of Comprehensive Income Statements 5 false false R6.htm 00400 - Statement - Consolidated Statement Of Changes In Equity Sheet http://www.mack-cali.com/role/StatementConsolidatedStatementOfChangesInEquity Consolidated Statement Of Changes In Equity Statements 6 false false R7.htm 00500 - Statement - Consolidated Statements Of Cash Flows Sheet http://www.mack-cali.com/role/StatementConsolidatedStatementsOfCashFlows Consolidated Statements Of Cash Flows Statements 7 false false R8.htm 10101 - Disclosure - Organization And Basis Of Presentation Sheet http://www.mack-cali.com/role/DisclosureOrganizationAndBasisOfPresentation Organization And Basis Of Presentation Notes 8 false false R9.htm 10201 - Disclosure - Significant Accounting Policies Sheet http://www.mack-cali.com/role/DisclosureSignificantAccountingPolicies Significant Accounting Policies Notes 9 false false R10.htm 10301 - Disclosure - Recent Transactions Sheet http://www.mack-cali.com/role/DisclosureRecentTransactions Recent Transactions Notes 10 false false R11.htm 10401 - Disclosure - Investments In Unconsolidated Joint Ventures Sheet http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVentures Investments In Unconsolidated Joint Ventures Notes 11 false false R12.htm 10501 - Disclosure - Deferred Charges, Goodwill And Other Assets, Net Sheet http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNet Deferred Charges, Goodwill And Other Assets, Net Notes 12 false false R13.htm 10601 - Disclosure - Restricted Cash Sheet http://www.mack-cali.com/role/DisclosureRestrictedCash Restricted Cash Notes 13 false false R14.htm 10701 - Disclosure - Senior Unsecured Notes Notes http://www.mack-cali.com/role/DisclosureSeniorUnsecuredNotes Senior Unsecured Notes Notes 14 false false R15.htm 10801 - Disclosure - Unsecured Revolving Credit Facility And Term Loans Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoans Unsecured Revolving Credit Facility And Term Loans Notes 15 false false R16.htm 10901 - Disclosure - Mortgages, Loans Payable And Other Obligations Sheet http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligations Mortgages, Loans Payable And Other Obligations Notes 16 false false R17.htm 11001 - Disclosure - Employee Benefit 401(k) Plans Sheet http://www.mack-cali.com/role/DisclosureEmployeeBenefit401KPlans Employee Benefit 401(k) Plans Notes 17 false false R18.htm 11101 - Disclosure - Disclosure Of Fair Value Of Assets And Liabilities Sheet http://www.mack-cali.com/role/DisclosureDisclosureOfFairValueOfAssetsAndLiabilities Disclosure Of Fair Value Of Assets And Liabilities Notes 18 false false R19.htm 11201 - Disclosure - Commitments And Contingencies Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingencies Commitments And Contingencies Notes 19 false false R20.htm 11301 - Disclosure - Tenant Leases Sheet http://www.mack-cali.com/role/DisclosureTenantLeases Tenant Leases Notes 20 false false R21.htm 11401 - Disclosure - Redeemable Noncontrolling Interests Sheet http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterests Redeemable Noncontrolling Interests Notes 21 false false R22.htm 11501 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapital Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital Notes 22 false false R23.htm 11601 - Disclosure - Noncontrolling Interests In Subsidiaries Sheet http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiaries Noncontrolling Interests In Subsidiaries Notes 23 false false R24.htm 11701 - Disclosure - Segment Reporting Sheet http://www.mack-cali.com/role/DisclosureSegmentReporting Segment Reporting Notes 24 false false R25.htm 20202 - Disclosure - Significant Accounting Policies (Policy) Sheet http://www.mack-cali.com/role/DisclosureSignificantAccountingPoliciesPolicy Significant Accounting Policies (Policy) Policies http://www.mack-cali.com/role/DisclosureSignificantAccountingPolicies 25 false false R26.htm 30203 - Disclosure - Significant Accounting Policies (Tables) Sheet http://www.mack-cali.com/role/DisclosureSignificantAccountingPoliciesTables Significant Accounting Policies (Tables) Tables http://www.mack-cali.com/role/DisclosureSignificantAccountingPolicies 26 false false R27.htm 30303 - Disclosure - Recent Transactions (Tables) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsTables Recent Transactions (Tables) Tables http://www.mack-cali.com/role/DisclosureRecentTransactions 27 false false R28.htm 30403 - Disclosure - Investments In Unconsolidated Joint Ventures (Tables) Sheet http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesTables Investments In Unconsolidated Joint Ventures (Tables) Tables http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVentures 28 false false R29.htm 30502 - Disclosure - Deferred Charges, Goodwill And Other Assets, Net (Tables) Sheet http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetTables Deferred Charges, Goodwill And Other Assets, Net (Tables) Tables http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNet 29 false false R30.htm 30603 - Disclosure - Restricted Cash (Tables) Sheet http://www.mack-cali.com/role/DisclosureRestrictedCashTables Restricted Cash (Tables) Tables http://www.mack-cali.com/role/DisclosureRestrictedCash 30 false false R31.htm 30703 - Disclosure - Senior Unsecured Notes (Tables) Notes http://www.mack-cali.com/role/DisclosureSeniorUnsecuredNotesTables Senior Unsecured Notes (Tables) Tables http://www.mack-cali.com/role/DisclosureSeniorUnsecuredNotes 31 false false R32.htm 30803 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Tables) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables Unsecured Revolving Credit Facility And Term Loans (Tables) Tables http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoans 32 false false R33.htm 30903 - Disclosure - Mortgages, Loans Payable And Other Obligations (Tables) Sheet http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligationsTables Mortgages, Loans Payable And Other Obligations (Tables) Tables http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligations 33 false false R34.htm 31203 - Disclosure - Commitments And Contingencies (Tables) Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTables Commitments And Contingencies (Tables) Tables http://www.mack-cali.com/role/DisclosureCommitmentsAndContingencies 34 false false R35.htm 31303 - Disclosure - Tenant Leases (Tables) Sheet http://www.mack-cali.com/role/DisclosureTenantLeasesTables Tenant Leases (Tables) Tables http://www.mack-cali.com/role/DisclosureTenantLeases 35 false false R36.htm 31403 - Disclosure - Redeemable Noncontrolling Interests (Tables) Sheet http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterestsTables Redeemable Noncontrolling Interests (Tables) Tables http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterests 36 false false R37.htm 31503 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Tables) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Tables) Tables http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapital 37 false false R38.htm 31603 - Disclosure - Noncontrolling Interests In Subsidiaries (Tables) Sheet http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesTables Noncontrolling Interests In Subsidiaries (Tables) Tables http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiaries 38 false false R39.htm 31703 - Disclosure - Segment Reporting (Tables) Sheet http://www.mack-cali.com/role/DisclosureSegmentReportingTables Segment Reporting (Tables) Tables http://www.mack-cali.com/role/DisclosureSegmentReporting 39 false false R40.htm 40101 - Disclosure - Organization And Basis Of Presentation (Details) Sheet http://www.mack-cali.com/role/DisclosureOrganizationAndBasisOfPresentationDetails Organization And Basis Of Presentation (Details) Details http://www.mack-cali.com/role/DisclosureOrganizationAndBasisOfPresentation 40 false false R41.htm 40201 - Disclosure - Significant Accounting Policies (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureSignificantAccountingPoliciesNarrativeDetails Significant Accounting Policies (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureSignificantAccountingPoliciesTables 41 false false R42.htm 40202 - Disclosure - Significant Accounting Policies (Estimated Useful Lives Of Assets) (Details) Sheet http://www.mack-cali.com/role/DisclosureSignificantAccountingPoliciesEstimatedUsefulLivesOfAssetsDetails Significant Accounting Policies (Estimated Useful Lives Of Assets) (Details) Details http://www.mack-cali.com/role/DisclosureSignificantAccountingPoliciesTables 42 false false R43.htm 40303 - Disclosure - Recent Transactions (Consolidation) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsConsolidationNarrativeDetails Recent Transactions (Consolidation) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 43 false false R44.htm 40304 - Disclosure - Recent Transactions (Rental Property Held for Sale, Net) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsRentalPropertyHeldForSaleNetNarrativeDetails Recent Transactions (Rental Property Held for Sale, Net) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 44 false false R45.htm 40305 - Disclosure - Recent Transactions (Rockpoint Transaction) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsRockpointTransactionNarrativeDetails Recent Transactions (Rockpoint Transaction) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 45 false false R46.htm 40307 - Disclosure - Recent Transactions (Unconsolidated Joint Venture Activity) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsUnconsolidatedJointVentureActivityNarrativeDetails Recent Transactions (Unconsolidated Joint Venture Activity) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 46 false false R47.htm 40308 - Disclosure - Recent Transactions (Schedule Of Properties Acquired) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsScheduleOfPropertiesAcquiredDetails Recent Transactions (Schedule Of Properties Acquired) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 47 false false R48.htm 40309 - Disclosure - Recent Transactions (Schedule Of Purchase Price Allocation) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsScheduleOfPurchasePriceAllocationDetails Recent Transactions (Schedule Of Purchase Price Allocation) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 48 false false R49.htm 40311 - Disclosure - Recent Transactions (Schedule Of Net Assets Recorded Upon Consolidation) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsScheduleOfNetAssetsRecordedUponConsolidationDetails Recent Transactions (Schedule Of Net Assets Recorded Upon Consolidation) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 49 false false R50.htm 40312 - Disclosure - Recent Transactions (Schedule Of Dispositions/Rental Property Held For Sale) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsScheduleOfDispositionsRentalPropertyHeldForSaleDetails Recent Transactions (Schedule Of Dispositions/Rental Property Held For Sale) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 50 false false R51.htm 40313 - Disclosure - Recent Transactions (Summary Of Income From Property Held For Sale, Net) (Details) Sheet http://www.mack-cali.com/role/DisclosureRecentTransactionsSummaryOfIncomeFromPropertyHeldForSaleNetDetails Recent Transactions (Summary Of Income From Property Held For Sale, Net) (Details) Details http://www.mack-cali.com/role/DisclosureRecentTransactionsTables 51 false false R52.htm 40401 - Disclosure - Investments In Unconsolidated Joint Ventures (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesNarrativeDetails Investments In Unconsolidated Joint Ventures (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesTables 52 false false R53.htm 40403 - Disclosure - Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details) Sheet http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesSummaryOfUnconsolidatedJointVenturesDetails Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details) Details http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesTables 53 false false R54.htm 40404 - Disclosure - Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) Sheet http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesSummaryOfCompanySEquityInEarningsLossOfUnconsolidatedJointVenturesDetails Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) Details http://www.mack-cali.com/role/DisclosureInvestmentsInUnconsolidatedJointVenturesTables 54 false false R55.htm 40501 - Disclosure - Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetNarrativeDetails Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetTables 55 false false R56.htm 40502 - Disclosure - Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) Sheet http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetScheduleOfDeferredChargesGoodwillAndOtherAssetsDetails Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) Details http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetTables 56 false false R57.htm 40504 - Disclosure - Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Fair Value Of The Derivative Financial Instruments) (Details) Sheet http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetScheduleOfFairValueOfDerivativeFinancialInstrumentsDetails Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Fair Value Of The Derivative Financial Instruments) (Details) Details http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetTables 57 false false R58.htm 40505 - Disclosure - Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement) (Details) Sheet http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetScheduleOfCashFlowHedgingDerivativeFinancialInstrumentsOnIncomeStatementDetails Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement) (Details) Details http://www.mack-cali.com/role/DisclosureDeferredChargesGoodwillAndOtherAssetsNetTables 58 false false R59.htm 40601 - Disclosure - Restricted Cash (Details) Sheet http://www.mack-cali.com/role/DisclosureRestrictedCashDetails Restricted Cash (Details) Details http://www.mack-cali.com/role/DisclosureRestrictedCashTables 59 false false R60.htm 40702 - Disclosure - Senior Unsecured Notes (Summary Of Senior Unsecured Notes) (Details) Notes http://www.mack-cali.com/role/DisclosureSeniorUnsecuredNotesSummaryOfSeniorUnsecuredNotesDetails Senior Unsecured Notes (Summary Of Senior Unsecured Notes) (Details) Details http://www.mack-cali.com/role/DisclosureSeniorUnsecuredNotesTables 60 false false R61.htm 40801 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansNarrativeDetails Unsecured Revolving Credit Facility And Term Loans (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables 61 false false R62.htm 40802 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Schedule Of Interest Rates On Outstanding Borrowings, Alternate Base Rate Loans, And Facility Fee) (Details) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansScheduleOfInterestRatesOnOutstandingBorrowingsAlternateBaseRateLoansAndFacilityFeeDetails Unsecured Revolving Credit Facility And Term Loans (Schedule Of Interest Rates On Outstanding Borrowings, Alternate Base Rate Loans, And Facility Fee) (Details) Details http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables 62 false false R63.htm 40803 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio, Including Interest Rate, Alternate Base Rate Loans, And Facility Fee) (Details) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansScheduleOfDefinedLeverageRatioIncludingInterestRateAlternateBaseRateLoansAndFacilityFeeDetails Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio, Including Interest Rate, Alternate Base Rate Loans, And Facility Fee) (Details) Details http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables 63 false false R64.htm 40804 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Schedule Of Unsecured Credit Rating And Facility Fee) (Details) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansScheduleOfUnsecuredCreditRatingAndFacilityFeeDetails Unsecured Revolving Credit Facility And Term Loans (Schedule Of Unsecured Credit Rating And Facility Fee) (Details) Details http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables 64 false false R65.htm 40805 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Schedule Of Interest Rate On Outstanding Borrowings Payable) (Details) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansScheduleOfInterestRateOnOutstandingBorrowingsPayableDetails Unsecured Revolving Credit Facility And Term Loans (Schedule Of Interest Rate On Outstanding Borrowings Payable) (Details) Details http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables 65 false false R66.htm 40806 - Disclosure - Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio) (Details) Sheet http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansScheduleOfDefinedLeverageRatioDetails Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio) (Details) Details http://www.mack-cali.com/role/DisclosureUnsecuredRevolvingCreditFacilityAndTermLoansTables 66 false false R67.htm 40901 - Disclosure - Mortgages, Loans Payable And Other Obligations (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligationsNarrativeDetails Mortgages, Loans Payable And Other Obligations (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligationsTables 67 false false R68.htm 40902 - Disclosure - Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details) Sheet http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligationsSummaryOfMortgagesLoansPayableAndOtherObligationsDetails Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details) Details http://www.mack-cali.com/role/DisclosureMortgagesLoansPayableAndOtherObligationsTables 68 false false R69.htm 41001 - Disclosure - Employee Benefit 401(k) Plans (Details) Sheet http://www.mack-cali.com/role/DisclosureEmployeeBenefit401KPlansDetails Employee Benefit 401(k) Plans (Details) Details http://www.mack-cali.com/role/DisclosureEmployeeBenefit401KPlans 69 false false R70.htm 41101 - Disclosure - Disclosure Of Fair Value Of Assets And Liabilities (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureDisclosureOfFairValueOfAssetsAndLiabilitiesNarrativeDetails Disclosure Of Fair Value Of Assets And Liabilities (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureDisclosureOfFairValueOfAssetsAndLiabilities 70 false false R71.htm 41201 - Disclosure - Commitments And Contingencies (Tax Abatement Agreements) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTaxAbatementAgreementsNarrativeDetails Commitments And Contingencies (Tax Abatement Agreements) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTables 71 false false R72.htm 41202 - Disclosure - Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesGroundLeaseAgreementsNarrativeDetails Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTables 72 false false R73.htm 41206 - Disclosure - Commitments And Contingencies (Construction Projects) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesConstructionProjectsNarrativeDetails Commitments And Contingencies (Construction Projects) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTables 73 false false R74.htm 41207 - Disclosure - Commitments And Contingencies (Other) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesOtherNarrativeDetails Commitments And Contingencies (Other) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTables 74 false false R75.htm 41208 - Disclosure - Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) Sheet http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesFutureMinimumRentalPaymentsOfGroundLeasesDetails Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) Details http://www.mack-cali.com/role/DisclosureCommitmentsAndContingenciesTables 75 false false R76.htm 41301 - Disclosure - Tenant Leases (Details) Sheet http://www.mack-cali.com/role/DisclosureTenantLeasesDetails Tenant Leases (Details) Details http://www.mack-cali.com/role/DisclosureTenantLeasesTables 76 false false R77.htm 41401 - Disclosure - Redeemable Noncontrolling Interests (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterestsNarrativeDetails Redeemable Noncontrolling Interests (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterestsTables 77 false false R78.htm 41402 - Disclosure - Redeemable Noncontrolling Interests (Schedule Of Changes In The Value Of The Redeemable Noncontrolling Interests) (Details) Sheet http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterestsScheduleOfChangesInValueOfRedeemableNoncontrollingInterestsDetails Redeemable Noncontrolling Interests (Schedule Of Changes In The Value Of The Redeemable Noncontrolling Interests) (Details) Details http://www.mack-cali.com/role/DisclosureRedeemableNoncontrollingInterestsTables 78 false false R79.htm 41501 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Share/Unit Repurchase Program And Dividend Reinvestment And Stock Purchase Plan) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalShareUnitRepurchaseProgramAndDividendReinvestmentAndStockPurchasePlanNarrativeDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Share/Unit Repurchase Program And Dividend Reinvestment And Stock Purchase Plan) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 79 false false R80.htm 41502 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Stock Options Plans) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalStockOptionsPlansNarrativeDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Stock Options Plans) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 80 false false R81.htm 41503 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Restricted Stock Awards And Performance Share Units) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalRestrictedStockAwardsAndPerformanceShareUnitsNarrativeDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Restricted Stock Awards And Performance Share Units) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 81 false false R82.htm 41504 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Long-Term Incentive Plan Awards) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalLongTermIncentivePlanAwardsNarrativeDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Long-Term Incentive Plan Awards) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 82 false false R83.htm 41505 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Deferred Stock Compensation Plan For Directors) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalDeferredStockCompensationPlanForDirectorsNarrativeDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Deferred Stock Compensation Plan For Directors) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 83 false false R84.htm 41506 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share/Unit) (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalEarningsPerShareUnitNarrativeDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share/Unit) (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 84 false false R85.htm 41507 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Stock Option Plans) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalScheduleOfStockOptionPlansDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Stock Option Plans) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 85 false false R86.htm 41509 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalScheduleOfRestrictedStockAwardsDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 86 false false R87.htm 41510 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Basic Computation Of EPS) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalEarningsPerShareTablesBasicComputationOfEpsDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Basic Computation Of EPS) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 87 false false R88.htm 41511 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalEarningsPerShareTablesDilutedComputationOfEpsDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 88 false false R89.htm 41512 - Disclosure - Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation) (Details) Sheet http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalScheduleOfReconciliationOfSharesUsedInBasicEpsCalculationToSharesUsedInDilutedEpsCalculationDetails Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation) (Details) Details http://www.mack-cali.com/role/DisclosureMackCaliRealtyCorporationStockholdersEquityAndMackCaliRealtyLpSPartnersCapitalTables 89 false false R90.htm 41601 - Disclosure - Noncontrolling Interests In Subsidiaries (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesNarrativeDetails Noncontrolling Interests In Subsidiaries (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesTables 90 false false R91.htm 41602 - Disclosure - Noncontrolling Interests In Subsidiaries (Schedule Of Activity Of Noncontrolling Interests) (Details) Sheet http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesScheduleOfActivityOfNoncontrollingInterestsDetails Noncontrolling Interests In Subsidiaries (Schedule Of Activity Of Noncontrolling Interests) (Details) Details http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesTables 91 false false R92.htm 41603 - Disclosure - Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details) Sheet http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesChangesInNoncontrollingInterestsOfSubsidiariesDetails Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details) Details http://www.mack-cali.com/role/DisclosureNoncontrollingInterestsInSubsidiariesTables 92 false false R93.htm 41701 - Disclosure - Segment Reporting (Narrative) (Details) Sheet http://www.mack-cali.com/role/DisclosureSegmentReportingNarrativeDetails Segment Reporting (Narrative) (Details) Details http://www.mack-cali.com/role/DisclosureSegmentReportingTables 93 false false R94.htm 41702 - Disclosure - Segment Reporting (Schedule Of Selected Results Of Operations And Asset Information) (Details) Sheet http://www.mack-cali.com/role/DisclosureSegmentReportingScheduleOfSelectedResultsOfOperationsAndAssetInformationDetails Segment Reporting (Schedule Of Selected Results Of Operations And Asset Information) (Details) Details http://www.mack-cali.com/role/DisclosureSegmentReportingTables 94 false false R95.htm 41703 - Disclosure - Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) Sheet http://www.mack-cali.com/role/DisclosureSegmentReportingScheduleOfReconciliationOfNetOperatingIncomeToNetIncomeAvailableToCommonShareholdersDetails Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) Details http://www.mack-cali.com/role/DisclosureSegmentReportingTables 95 false false All Reports Book All Reports cli-20170630.xml cli-20170630.xsd cli-20170630_cal.xml cli-20170630_def.xml cli-20170630_lab.xml cli-20170630_pre.xml true true