Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified
|
3 Months Ended |
Mar. 31, 2015
|
Mar. 31, 2014
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
$ (3,529)us-gaap_IncomeLossFromEquityMethodInvestments
|
$ (1,235)us-gaap_IncomeLossFromEquityMethodInvestments
|
Marbella RoseGarden, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
61us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_MarbellaRoseGardenLLCMember
|
(6)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_MarbellaRoseGardenLLCMember
|
RoseGarden Monaco Holdings, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(317)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RoseGardenMonacoHoldingsLLCMember
|
(277)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RoseGardenMonacoHoldingsLLCMember
|
Rosewood Lafayette Holdings, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(62)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RosewoodLafayetteHoldingsLLCMember
|
(216)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RosewoodLafayetteHoldingsLLCMember
|
Rosewood Morristown, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(94)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RosewoodMorristownLLCMember
|
(98)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RosewoodMorristownLLCMember
|
Overlook Ridge JV 2C/3B, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(220)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_OverlookRidgeJvTwoCAndThreeBLLCMember
|
62us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_OverlookRidgeJvTwoCAndThreeBLLCMember
|
PruRose Riverwalk G, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(254)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PruRoseRiverwalkGLLCMember
|
(538)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PruRoseRiverwalkGLLCMember
|
Elmajo Urban Renewal Associates, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
|
(112)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_ElmajoUrbanRenewalAssociatesLLCMember
|
Crystal House Apartments Investors LLC [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(10)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_CrystalHouseApartmentsInvestorsLLCMember
|
(327)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_CrystalHouseApartmentsInvestorsLLCMember
|
Portside Master Company, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(719)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PortsideMasterCompanyLLCMember
|
(213)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PortsideMasterCompanyLLCMember
|
PruRose Port Imperial South 13, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(225)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PruRosePortImperialSouthThirteenLLCMember
|
(206)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PruRosePortImperialSouthThirteenLLCMember
|
Roseland/Port Imperial Partners, L.P. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(184)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RoselandPortImperialPartnersLPMember
|
(164)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RoselandPortImperialPartnersLPMember
|
Estuary Urban Renewal Unit B, LLC [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
|
(15)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_EstuaryUrbanRenewalUnitBLLCMember
|
RiverPark At Harrison I, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(173)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RiverparkAtHarrisonILLCMember
|
|
Capitol Place Mezz LLC [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
75us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_CapitolPlaceMezzLlcMember
|
|
Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(19)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_GrandJerseyWaterfrontUrbanRenewalAssociatesLLCMember
|
(37)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_GrandJerseyWaterfrontUrbanRenewalAssociatesLLCMember
|
Red Bank Corporate Plaza, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
110us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RedBankCorporatePlazaLLCMember
|
99us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RedBankCorporatePlazaLLCMember
|
12 Vreeland Associates, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(14)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_TwelveVreelandAssociatesLLCMember
|
89us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_TwelveVreelandAssociatesLLCMember
|
BNES Associates III [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
68us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_BNESAssociatesIIIMember
|
36us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_BNESAssociatesIIIMember
|
Hillsborough 206 Holdings, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
|
(5)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_HillsboroughTwoHundredSixHoldingsLLCMember
|
KPG-P 100 IMW JV, LLC [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(384)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_KpgPOneHundredImwJvLlcMember
|
(653)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_KpgPOneHundredImwJvLlcMember
|
Keystone-TriState [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(1,348)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_KeystoneTristateMember
|
|
KPG-MCG Curtis JV, LLC [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
196us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_KpgMcgCurtisJvLLCMember
|
|
Plaza VIII & IX Associates, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
86us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PlazaEightAndNineAssociatesLLCMember
|
102us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_PlazaEightAndNineAssociatesLLCMember
|
Roseland/North Retail, L.L.C. [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(18)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RoselandNorthRetailLLCMember
|
(24)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_RoselandNorthRetailLLCMember
|
South Pier At Harborside [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
(84)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_SouthPierAtHarborsideMember
|
398us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_SouthPierAtHarborsideMember
|
Stamford SM LLC [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
|
916us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_StamfordSmLlcMember
|
Other [Member] |
|
|
Schedule of Equity Method Investments [Line Items] |
|
|
Company's equity in earnings (loss) of unconsolidated joint ventures |
|
$ (46)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cli_OtherJointVenturesMember
|