Discontinued Operations (Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)) (Details) (USD $)
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3 Months Ended |
12 Months Ended |
3 Months Ended |
0 Months Ended |
Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2012
sqft
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Apr. 10, 2013
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Apr. 26, 2013
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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Total revenues |
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$ 33,601,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
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$ 66,882,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
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Operating and other expenses |
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(13,454,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
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(26,484,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
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Depreciation and amortization |
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(8,218,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization
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(17,765,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization
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Interest expense |
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(118,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
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(755,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
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Income from discontinued operations |
(9,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
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2,157,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
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4,530,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
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5,133,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
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11,811,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
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21,878,000us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
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Loss from early extinguishment of debt |
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(703,000)cli_DiscontinuedOperationGainsLossesOnExtinguishmentOfDebt
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(703,000)cli_DiscontinuedOperationGainsLossesOnExtinguishmentOfDebt
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Impairments |
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(23,851,000)cli_DiscontinuedOperationsAssetImpairmentCharges
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[1] |
(8,400,000)cli_DiscontinuedOperationsAssetImpairmentCharges
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[1] |
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Unrealized losses on disposition of rental property |
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(9,213,000)cli_UnrealizedGainLossOnDispositionOfRentalProperty
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[2] |
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Realized gains on disposition of rental property |
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83,371,000cli_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssets
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4,438,000cli_DisposalGroupIncludingDiscontinuedOperationGainLossOnDispositionOfAssets
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Realized gains (losses) on disposition of rental property and impairments, net |
(1,559,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
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[3] |
47,321,000us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
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13,758,000us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
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59,520,000us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
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(13,175,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
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Total discontinued operations, net |
(1,568,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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49,478,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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17,585,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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5,133,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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70,628,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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8,703,000us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
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Valuation allowance |
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14,400,000us-gaap_DeferredTaxAssetsValuationAllowance
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Sales proceeds |
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319,239,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment
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390,615,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment
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[4] |
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Gain (loss) on sale of property |
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54,848,000us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations
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83,371,000us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations
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[5] |
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Rental property held for sale, net |
307,244,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
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264,391,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
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307,244,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
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Accumulated depreciation |
1,400,988,000us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
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1,414,305,000us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
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1,400,988,000us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
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95 Chestnut Ridge Road [Member] |
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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Area of property (in square feet) |
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47,700us-gaap_AreaOfRealEstateProperty / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NinetyFiveChestnutRidgeRoadMember
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Valuation allowance |
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500,000us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NinetyFiveChestnutRidgeRoadMember
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Sales proceeds |
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4,000,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NinetyFiveChestnutRidgeRoadMember
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Moorestown, New Jersey [Member] |
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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Area of property (in square feet) |
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222,258us-gaap_AreaOfRealEstateProperty / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_MoorestownNewJerseyMember
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Valuation allowance |
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1,600,000us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_MoorestownNewJerseyMember
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Sales proceeds |
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19,400,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_MoorestownNewJerseyMember
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Gain (loss) on sale of property |
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(100,000)us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_MoorestownNewJerseyMember
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Number of properties held for sale |
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3cli_NumberOfRealEstatePropertiesHeldForSale / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_MoorestownNewJerseyMember
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19 Skyline Drive [Member] |
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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Area of property (in square feet) |
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248,400us-gaap_AreaOfRealEstateProperty / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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Valuation allowance |
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7,100,000us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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Sales proceeds |
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16,131,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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[6] |
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16,100,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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Gain (loss) on sale of property |
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126,000us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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[6] |
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100,000us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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Rental property held for sale, net |
16,005,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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[6] |
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16,005,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_NineteenSkylineDriveMember
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[6] |
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55 Corporate Drive [Member] |
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
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Area of property (in square feet) |
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204,057us-gaap_AreaOfRealEstateProperty / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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Valuation allowance |
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7,100,000us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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Sales proceeds |
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70,967,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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71,000,000us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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Gain (loss) on sale of property |
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19,659,000us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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19,700,000us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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Number of properties held for sale |
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2cli_NumberOfRealEstatePropertiesHeldForSale / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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Rental property held for sale, net |
51,308,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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51,308,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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60,900,000us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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Accumulated depreciation |
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$ 16,800,000us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = cli_FiftyFiveCorporateDriveMember
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