Veris Residential (VRE) 10-Q 24 Oct 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 21, 2013
Document And Entity Information [Abstract]
Entity Registrant Name	MACK CALI REALTY CORP
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	30-Sep-13
Entity Central Index Key	924901
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Entity Common Stock, Shares Outstanding		88,023,335

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Rental property
Land and leasehold interests	$755,643	$782,315
Buildings and improvements	3,908,139	4,104,472
Tenant improvements	445,623	489,608
Furniture, fixtures and equipment	4,535	3,041
Gross investment in rental property	5,113,940	5,379,436
Less - accumulated depreciation and amortization	-1,392,064	-1,478,214
Total investment in rental property	3,721,876	3,901,222
Rental property held for sale, net		60,863
Net investment in rental property	3,721,876	3,962,085
Cash and cash equivalents	308,043	58,245
Investments in unconsolidated joint ventures	131,859	132,339
Unbilled rents receivable, net	134,695	139,984
Deferred charges, goodwill and other assets	284,399	204,874
Restricted cash	19,213	19,339
Accounts receivable, net of allowance for doubtful accounts of $3,122 and $2,614	9,178	9,179
Total assets	4,609,263	4,526,045
LIABILITIES AND EQUITY
Senior unsecured notes	1,616,337	1,446,894
Mortgages, loans payable and other obligations	752,344	757,495
Dividends and distributions payable	30,003	44,855
Accounts payable, accrued expenses and other liabilities	130,588	124,822
Rents received in advance and security deposits	45,857	55,917
Accrued interest payable	23,472	27,555
Total liabilities	2,598,601	2,457,538
Commitments and contingencies
Mack-Cali Realty Corporation stockholders' equity:
Common stock, $0.01 par value, 190,000,000 shares authorized, 88,021,807 and 87,536,292 shares outstanding	880	875
Additional paid-in capital	2,536,837	2,530,621
Dividends in excess of net earnings	-817,387	-764,522
Total Mack-Cali Realty Corporation stockholders' equity	1,720,330	1,766,974
Noncontrolling interests in subsidiaries:
Operating Partnership	234,282	245,091
Consolidated joint ventures	56,050	56,442
Total noncontrolling interests in subsidiaries	290,332	301,533
Total equity	2,010,662	2,068,507
Total liabilities and equity	$4,609,263	$4,526,045

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts receivable	$3,122	$2,614
Common stock, par value per share	$0.01	$0.01
Common stock, shares authorized	190,000,000	190,000,000
Common stock, shares outstanding	88,021,807	87,536,292

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUES
Base rents	$134,882	$132,388	$403,943	$401,920
Escalations and recoveries from tenants	17,173	19,717	54,117	56,540
Construction services	678	1,169	15,650	9,235
Real estate services	7,003	1,247	20,088	3,519
Parking income	1,642	1,427	4,631	4,553
Other income	1,127	849	3,335	10,524
Total revenues	162,505	156,797	501,764	486,291
EXPENSES
Real estate taxes	20,572	20,472	62,055	64,587
Utilities	18,043	16,647	48,070	44,645
Operating services	25,852	24,261	76,487	71,859
Direct construction costs	609	979	14,945	8,594
Real estate services expenses	5,552	536	15,809	1,542
General and administrative	12,151	12,580	37,235	35,150
Depreciation and amortization	46,094	43,492	135,122	130,720
Impairments	48,700		48,700
Total expenses	177,573	118,967	438,423	357,097
Operating income	-15,068	37,830	63,341	129,194
OTHER (EXPENSE) INCOME
Interest expense	-30,936	-30,428	-92,075	-92,539
Interest and other investment income	187	7	1,287	27
Equity in earnings (loss) of unconsolidated joint ventures	-229	2,418	-2,059	4,751
Loss from early extinguishment of debt				-4,415
Total other (expense) income	-30,978	-28,003	-92,847	-92,176
Income (loss) from continuing operations	-46,046	9,827	-29,506	37,018
Discontinued operations:
Income from discontinued operations	2,164	6,337	11,842	17,446
Loss from early extinguishment of debt			-703
Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net	47,321	12	61,079	2,390
Total discontinued operations, net	49,485	6,349	72,218	19,836
Net income	3,439	16,176	42,712	56,854
Noncontrolling interest in consolidated joint ventures	1,838	85	1,962	256
Noncontrolling interest in Operating Partnership	5,314	-1,207	3,295	-4,543
Noncontrolling interest in discontinued operations	-5,948	-773	-8,699	-2,418
Net income available to common shareholders	$4,643	$14,281	$39,270	$50,149
Basic earnings per common share:
Income (loss) from continuing operations	($0.44)	$0.10	($0.28)	$0.37
Discontinued operations	$0.49	$0.06	$0.73	$0.20
Net income available to common shareholders	$0.05	$0.16	$0.45	$0.57
Diluted earnings per common share:
Income (loss) from continuing operations	($0.44)	$0.10	($0.28)	$0.37
Discontinued operations	$0.49	$0.06	$0.73	$0.20
Net income available to common shareholders	$0.05	$0.16	$0.45	$0.57
Basic weighted average shares outstanding	87,793	87,826	87,724	87,814
Diluted weighted average shares outstanding	99,787	100,075	99,778	100,071

Consolidated_Statement_Of_Chan

Consolidated Statement Of Changes In Equity (USD $)	Common Stock [Member]	Additional Paid-In Capital [Member]	Dividends In Excess Of Net Earnings [Member]	Noncontrolling Interests In Subsidiaries [Member]	Total
In Thousands
Balance, value at Dec. 31, 2012	$875	$2,530,621	($764,522)	$301,533	$2,068,507
Balance, shares at Dec. 31, 2012	87,536
Net income			39,270	3,442	42,712
Common stock dividends			-92,135		-92,135
Common unit distributions				-12,634	-12,634
Increase in noncontrolling interest				1,570	1,570
Redemption of common units for common stock, value	2	3,084		-3,086
Redemption of common units for common stock, shares	155
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value		191			191
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares	7
Stock compensation, value	3	2,448			2,451
Stock compensation, shares	324
Rebalancing of ownership percentage between parent and subsidiaries		493		-493
Balance, value at Sep. 30, 2013	$880	$2,536,837	($817,387)	$290,332	$2,010,662
Balance, shares at Sep. 30, 2013	88,022

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$42,712,000	$56,854,000
Adjustments to reconcile net income to net cash provided by Operating activities:
Depreciation and amortization, including related intangible assets	135,148,000	130,683,000
Depreciation and amortization on discontinued operations	8,196,000	13,363,000
Amortization of stock compensation	2,451,000	2,338,000
Amortization of deferred financing costs and debt discount	2,379,000	1,945,000
Write off of unamortized discount on senior unsecured notes	156,000	370,000
Equity in loss (earnings) of unconsolidated joint venture, net	2,059,000	-4,751,000
Distributions of cumulative earnings from unconsolidated joint ventures	6,468,000	2,680,000
Realized (gains) and unrealized losses on disposition of rental property and impairments, net	-61,079,000	-2,390,000
Impairments	48,700,000
Changes in operating assets and liabilities:
Increase in unbilled rents receivable, net	-8,504,000	-2,438,000
Increase in deferred charges, goodwill and other assets	-27,584,000	-22,521,000
Decrease (increase) in accounts receivable, net	1,000	-909,000
Increase in accounts payable, accrued expenses and other liabilities	5,967,000	8,056,000
Decrease in rents received in advance and security deposits	-10,059,000	-2,472,000
Decrease in accrued interest payable	-4,083,000	-7,733,000
Net cash provided by operating activities	142,928,000	173,075,000
CASH FLOWS FROM INVESTING ACTIVITIES
Rental property acquisitions and related intangibles	-149,200,000
Rental property additions and improvements	-67,172,000	-59,105,000
Development of rental property	-12,954,000	-16,301,000
Proceeds from the sale of rental property	332,540,000	4,023,000
Issuance of notes and mortgage receivable	-16,425,000
Repayment of notes receivable	208,000
Investment in unconsolidated joint ventures	-32,235,000	-32,477,000
Distributions in excess of cumulative earnings from unconsolidated joint ventures	20,671,000	1,028,000
Payment of contingent consideration	-2,755,000
Decrease in restricted cash	126,000	906,000
Net cash provided by (used in) investing activities	72,804,000	-101,926,000
CASH FLOW FROM FINANCING ACTIVITIES
Borrowings from revolving credit facility	289,000,000	420,026,000
Repayment of revolving credit facility	-289,000,000	-408,526,000
Proceeds from senior unsecured notes	268,928,000	299,403,000
Repayment of senior unsecured notes	-100,000,000	-221,019,000
Proceeds from mortgages and loans payable	2,343,000
Repayment of mortgages, loans payable and other obligations	-12,185,000	-22,424,000
Payment of financing costs	-5,459,000	-2,635,000
Payment of dividends and distributions	-119,561,000	-134,927,000
Net cash provided by (used in) financing activities	34,066,000	-70,102,000
Net increase in cash and cash equivalents	249,798,000	1,047,000
Cash and cash equivalents, beginning of period	58,245,000	20,496,000
Cash and cash equivalents, end of period	$308,043,000	$21,543,000

Organization_And_Basis_Of_Pres

Organization And Basis Of Presentation	9 Months Ended
	Sep. 30, 2013
Organization And Basis Of Presentation [Abstract]
Organization And Basis Of Presentation	1.    ORGANIZATION AND BASIS OF PRESENTATION
	Organization
	Mack-Cali Realty Corporation, a Maryland corporation, together with its subsidiaries (collectively, the “Company”), is a fully-integrated, self-administered, self-managed real estate investment trust (“REIT”) providing leasing, management, acquisition, development, construction and tenant-related services for its properties and third parties.  As of September 30, 2013, the Company owned or had interests in 275 properties plus developable land (collectively, the “Properties”).  The Properties aggregate approximately 30.7 million square feet, which are comprised of 251 buildings, primarily office and office/flex buildings totaling approximately 30.2 million square feet (which include 21 buildings, primarily office buildings aggregating approximately 2.6 million square feet owned by unconsolidated joint ventures in which the Company has investment interests), six industrial/warehouse buildings totaling approximately 387,400 square feet, nine multi-family properties totaling 3,319 apartments (which include seven properties aggregating 2,597 apartments owned by unconsolidated joint ventures in which the Company has investment interests), five parking/retail properties totaling approximately 115,600 square feet (which include two buildings aggregating 81,500 square feet  owned by unconsolidated joint ventures in which the Company has investment interests), one hotel (which is owned by an unconsolidated joint venture in which the Company has an investment interest) and three parcels of land leased to others.  The Properties are located in seven states, primarily in the Northeast, plus the District of Columbia.
	BASIS OF PRESENTATION
	The accompanying consolidated financial statements include all accounts of the Company, its majority-owned and/or controlled subsidiaries, which consist principally of Mack-Cali Realty, L.P. (the “Operating Partnership”), and variable interest entities for which the Company has determined itself to be the primary beneficiary, if any.  See Note 2: Significant Accounting Policies – Investments in Unconsolidated Joint Ventures, for the Company’s treatment of unconsolidated joint venture interests.  Intercompany accounts and transactions have been eliminated.
	Accounting Standards Codification (“ASC”) 810, Consolidation, provides guidance on the identification of entities for which control is achieved through means other than voting rights (“variable interest entities” or “VIEs”) and the determination of which business enterprise, if any, should consolidate the VIEs. Generally, the consideration of whether an entity is a VIE applies when either: (1) the equity investors (if any) lack one or more of the essential characteristics of a controlling financial interest; (2) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support; or (3) the equity investors have voting rights that are not proportionate to their economic interests and the activities of the entity involve or are conducted on behalf of an investor with a disproportionately small voting interest.  The Company consolidates VIEs in which it is considered to be the primary beneficiary.  The primary beneficiary is defined by the entity having both of the following characteristics: (1) the power to direct the activities that, when taken together, most significantly impact the variable interest entity’s performance: and (2) the obligation to absorb losses and right to receive the returns from the VIE that would be significant to the VIE.
	The preparation of financial statements in conformity with generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.  Certain reclassifications have been made to prior period amounts in order to conform with current period presentation.

Significant_Accounting_Policie

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Significant Accounting Policies [Abstract]
Significant Accounting Policies	2.    SIGNIFICANT ACCOUNTING POLICIES
	Rental
	PropertyRental properties are stated at cost less accumulated depreciation and amortization.  Costs directly related to the acquisition, development and construction of rental properties are capitalized.  Acquisition-related costs are expensed as incurred.  Capitalized development and construction costs include pre-construction costs essential to the development of the property, development and construction costs, interest, property taxes, insurance, salaries and other project costs incurred during the period of development.  Capitalized development and construction salaries and related costs approximated $1.9 million and $0.8 million for the three months ended September 30, 2013 and 2012, respectively, and $3.7 million and $2.2 million for the nine months ended September 30, 2013 and 2012, respectively.  Included in total rental property is construction, tenant improvement and development in-progress of $44.9 million and $107.6 million (which included costs related to two properties placed in service during the nine months ended September 30, 2013) as of September 30, 2013 and December 31, 2012, respectively.  Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.  Fully-depreciated assets are removed from the accounts.
	The Company considers a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year from cessation of major construction activity (as distinguished from activities such as routine maintenance and cleanup).  If portions of a rental project are substantially completed and occupied by tenants, or held available for occupancy, and other portions have not yet reached that stage, the substantially completed portions are accounted for as a separate project.  The Company allocates costs incurred between the portions under construction and the portions substantially completed and held available for occupancy, primarily based on a percentage of the relative square footage of each portion, and capitalizes only those costs associated with the portion under construction.
	Properties are depreciated using the straight-line method over the estimated useful lives of the assets.  The estimated useful lives are as follows:
	Leasehold interests	Remaining lease term
	Buildings and improvements	5 to 40 years
	Tenant improvements	The shorter of the term of the
		related lease or useful life
	Furniture, fixtures and equipment	5 to 10 years
	Upon acquisition of rental property, the Company estimates the fair value of acquired tangible assets, consisting of land, building and improvements, and identified intangible assets and liabilities assumed, generally consisting of the fair value of (i) above and below market leases, (ii) in-place leases and (iii) tenant relationships.  The Company allocates the purchase price to the assets acquired and liabilities assumed based on their fair values.  The Company records goodwill or a gain on bargain purchase (if any) if the net assets acquired/liabilities assumed exceed the purchase consideration of a transaction.  In estimating the fair value of the tangible and intangible assets acquired, the Company considers information obtained about each property as a result of its due diligence and marketing and leasing activities, and utilizes various valuation methods, such as estimated cash flow projections utilizing appropriate discount and capitalization rates, estimates of replacement costs net of depreciation, and available market information.  The fair value of the tangible assets of an acquired property considers the value of the property as if it were vacant.
	Above-market and below-market lease values for acquired properties are initially recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of fair market lease rates for each corresponding in-place lease, measured over a period equal to the remaining term of the lease for above-market leases and the remaining initial term plus the term of any below-market fixed rate renewal options for below-market leases.  The capitalized above-market lease values are amortized as a reduction of base rental revenue over the remaining terms of the respective leases, and the capitalized below-market lease values are amortized as an increase to base rental revenue over the remaining initial terms plus the terms of any below-market fixed rate renewal options of the respective leases.
	Other intangible assets acquired include amounts for in-place lease values and tenant relationship values, which are based on management’s evaluation of the specific characteristics of each tenant’s lease and the Company’s overall relationship with the respective tenant.  Factors to be considered by management in its analysis of in-place lease values include an estimate of carrying costs during hypothetical expected lease-up periods considering current market conditions, and costs to execute similar leases.  In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease-up periods, depending on local market conditions.  In estimating costs to execute similar leases, management considers leasing commissions, legal and other related expenses.  Characteristics considered by management in valuing tenant relationships include the nature and extent of the Company’s existing business relationships with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals.  The value of in-place leases are amortized to expense over the remaining initial terms of the respective leases.  The value of tenant relationship intangibles are amortized to expense over the anticipated life of the relationships.
	On a periodic basis, management assesses whether there are any indicators that the value of the Company’s rental properties held for use may be impaired.  In addition to identifying any specific circumstances which may affect a property or properties, management considers other criteria for determining which properties may require assessment for potential impairment.  The criteria considered by management include reviewing low leased percentages, significant near-term lease expirations, recently acquired properties, current and historical operating and/or cash flow losses, near-term mortgage debt maturities or other factors that might impact the Company’s intent and ability to hold the property.  A property’s value is impaired only if management’s estimate of the aggregate future cash flows (undiscounted and without interest charges) to be generated by the property is less than the carrying value of the property.  To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the property over the fair value of the property.  The Company’s estimates of aggregate future cash flows expected to be generated by each property are based on a number of assumptions.  These assumptions are generally based on management’s experience in its local real estate markets and the effects of current market conditions.  The assumptions are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and costs to operate each property.  As these factors are difficult to predict and are subject to future events that may alter management’s assumptions, the future cash flows estimated by management in its impairment analyses may not be achieved, and actual losses or impairments may be realized in the future.
	As of September 30, 2013 and December 31, 2012, the Company’s consolidated real estate joint ventures in which the Company is deemed to be the primary beneficiary have total real estate assets of $210.6 million and $198.3 million, respectively, mortgages of $79.4 million and $77.1 million, respectively, and other liabilities of $16.6 million and $16.5 million, respectively.
	Rental Property
	Held for Sale and
	Discontinued
	OperationsWhen assets are identified by management as held for sale, the Company discontinues depreciating the assets and estimates the sales price, net of selling costs, of such assets.  If, in management’s opinion, the estimated net sales price of the assets which have been identified as held for sale is less than the net book value of the assets, a valuation allowance is established.  Properties identified as held for sale and/or disposed of are presented in discontinued operations for all periods presented.  See Note 7: Discontinued Operations.
	If circumstances arise that previously were considered unlikely and, as a result, the Company decides not to sell a property previously classified as held for sale, the property is reclassified as held and used.  A property that is reclassified is measured and recorded individually at the lower of (a) its carrying amount before the property was classified as held for sale, adjusted for any depreciation (amortization) expense that would have been recognized had the property been continuously classified as held and used, or (b) the fair value at the date of the subsequent decision not to sell.
	Investments in
	Unconsolidated
	Joint VenturesThe Company accounts for its investments in unconsolidated joint ventures under the equity method of accounting.  The Company applies the equity method by initially recording these investments at cost, as Investments in Unconsolidated Joint Ventures, subsequently adjusted for equity in earnings and cash contributions and distributions.  The outside basis portion of the Company’s joint ventures is amortized over the anticipated useful lives of the underlying ventures’ tangible and intangible assets acquired and liabilities assumed.  Generally, the Company would discontinue applying the equity method when the investment (and any advances) is reduced to zero and would not provide for additional losses unless the Company has guaranteed obligations of the venture or is otherwise committed to providing further financial support for the investee.    If the venture subsequently generates income, the Company only recognizes its share of such income to the extend it exceeds its share of previously unrecognized losses.
	On a periodic basis, management assesses whether there are any indicators that the value of the Company’s investments in unconsolidated joint ventures may be impaired.  An investment is impaired only if management’s estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other than temporary.  To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the investment over the value of the investment.  The Company’s estimates of value for each investment (particularly in commercial real estate joint ventures) are based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and operating costs.  As these factors are difficult to predict and are subject to future events that may alter management’s assumptions, the values estimated by management in its impairment analyses may not be realized, and actual losses or impairment may be realized in the future.  See Note 4: Investments in Unconsolidated Joint Ventures.
	Cash and Cash
	EquivalentsAll highly liquid investments with a maturity of three months or less when purchased are considered to be cash equivalents.
	Deferred
	Financing CostsCosts incurred in obtaining financing are capitalized and amortized over the term of the related indebtedness. Amortization of such costs is included in interest expense and was $954,000 and $673,000 for the three months ended September 30, 2013 and 2012, respectively, and $2,379,000 and $1,945,000 for the nine months ended September 30, 2013 and 2012, respectively.  If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (loss) on early extinguishment of debt. Such unamortized costs which were written off amounted to $156,000 and zero for the three months ended September 30, 2013 and 2012, respectively, and $156,000 and $370,000 for the nine months ended September 30, 2013 and 2012, respectively.
	Deferred
	Leasing CostsCosts incurred in connection with leases are capitalized and amortized on a straight-line basis over the terms of the related leases and included in depreciation and amortization.  Unamortized deferred leasing costs are charged to amortization expense upon early termination of the lease.  Certain employees of the Company are compensated for providing leasing services to the Properties.  The portion of such compensation, which is capitalized and amortized, approximated $962,000 and $1,156,000 for the three months ended September 30, 2013 and 2012, respectively, and $3,168,000 and $3,312,000 for the nine months ended September 30, 2013 and 2012, respectively.
	GoodwillGoodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination.  Management performs an annual impairment test for goodwill during the fourth quarter.  Additionally, management evaluates the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amounts of goodwill may not be fully recoverable.
	Derivative
	InstrumentsThe Company measures derivative instruments, including certain derivative instruments embedded in other contracts, at fair value and records them as an asset or liability, depending on the Company’s rights or obligations under the applicable derivative contract.  For derivatives designated and qualifying as fair value hedges, the changes in the fair value of both the derivative instrument and the hedged item are recorded in earnings.  For derivatives designated as cash flow hedges, the effective portions of the derivative are reported in other comprehensive income (“OCI”) and are subsequently reclassified into earnings when the hedged item affects earnings. Changes in fair value of derivative instruments not designated as hedging and ineffective portions of hedges are recognized in earnings in the affected period.
	Revenue
	RecognitionBase rental revenue is recognized on a straight-line basis over the terms of the respective leases.  Unbilled rents receivable represents the cumulative amount by which straight-line rental revenue exceeds rents currently billed in accordance with the lease agreements.  Above-market and below-market lease values for acquired properties are initially recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of fair market lease rates for each corresponding in-place lease, measured over a period equal to the remaining term of the lease for above-market leases and the remaining initial term plus the term of any below-market fixed-rate renewal options for below-market leases.  The capitalized above-market lease values for acquired properties are amortized as a reduction of base rental revenue over the remaining terms of the respective leases, and the capitalized below-market lease values are amortized as an increase to base rental revenue over the remaining initial terms plus the terms of any below-market fixed-rate renewal options of the respective leases.  Escalations and recoveries from tenants are received from tenants for certain costs as provided in the lease agreements.  These costs generally include real estate taxes, utilities, insurance, common area maintenance and other recoverable costs.  See Note 14: Tenant Leases.  Construction services revenue includes fees earned and reimbursements received by the Company for providing construction management and general contractor services to clients.  Construction services revenue is recognized on the percentage of completion method.  Using this method, profits are recorded on the basis of our estimates of the overall profit and percentage of completion of individual contracts.  A portion of the estimated profits is accrued based upon estimates of the percentage of completion of the construction contract.  This revenue recognition method involves inherent risks relating to profit and cost estimates.  Real estate services revenue includes property management, development and leasing commission fees and other services, and payroll and related costs reimbursed from clients.  Fee income derived from the Company’s unconsolidated joint ventures (which are capitalized by such ventures) are recognized to the extent attributable to the unaffiliated ownership interests.  Other income includes income from tenants for additional services arranged for by the Company and income from tenants for early lease terminations.
	Allowance for
	Doubtful AccountsManagement periodically performs a detailed review of amounts due from tenants to determine if accounts receivable balances are impaired based on factors affecting the collectability of those balances.  Management’s estimate of the allowance for doubtful accounts requires management to exercise significant judgment about the timing, frequency and severity of collection losses, which affects the allowance and net income.
	Income and
	Other TaxesThe Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”).  As a REIT, the Company generally will not be subject to corporate federal income tax (including alternative minimum tax) on net income that it currently distributes to its shareholders, provided that the Company satisfies certain organizational and operational requirements including the requirement to distribute at least 90 percent of its REIT taxable income to its shareholders.  The Company has elected to treat certain of its corporate subsidiaries as taxable REIT subsidiaries (each a “TRS”).  In general, a TRS of the Company may perform additional services for tenants of the Company and generally may engage in any real estate or non-real estate related business (except for the operation or management of health care facilities or lodging facilities or the providing to any person, under a franchise, license or otherwise, rights to any brand name under which any lodging facility or health care facility is operated).  A TRS is subject to corporate federal income tax.  If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.  The Company is subject to certain state and local taxes.
	Pursuant to the amended provisions related to uncertain tax provisions of ASC 740, Income Taxes, the Company recognized no material adjustments regarding its tax accounting treatment.  The Company expects to recognize interest and penalties related to uncertain tax positions, if any, as income tax expense, which is included in general and administrative expense.
	In the normal course of business, the Company or one of its subsidiaries is subject to examination by federal, state and local jurisdictions in which it operates, where applicable.  As of September 30, 2013, the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2008 forward.
	Earnings
	Per ShareThe Company presents both basic and diluted earnings per share (“EPS”).  Basic EPS excludes dilution and is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding for the period.  Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount.  Shares whose issuance is contingent upon the satisfaction of certain conditions shall be considered outstanding and included in the computation of diluted EPS as follows (i) if all necessary conditions have been satisfied by the end of the period (the events have occurred), those shares shall be included as of the beginning of the period in which the conditions were satisfied (or as of the date of the grant, if later) or (ii)  if all necessary conditions have not been satisfied by the end of the period, the number of contingently issuable shares included in diluted EPS shall be based on the number of shares, if any, that would be issuable if the end of the reporting period were the end of the contingency period (for example, the number of shares that would be issuable based on current period earnings or period-end market price) and if the result would be dilutive. Those contingently issuable shares shall be included in the denominator of diluted EPS as of the beginning of the period (or as of the date of the grant, if later).
	Dividends and
	Distributions
	PayableThe dividends and distributions payable at September 30, 2013 represents dividends payable to common shareholders (87,766,758 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (11,987,175 common units) for all such holders of record as of October 3, 2013 with respect to the third quarter 2013.  The third quarter 2013 common stock dividends and common unit distributions of $0.30 per common share and unit were approved by the Board of Directors on September 12, 2013.  The common stock dividends and common unit distributions payable were paid on October 11, 2013.
	The dividends and distributions payable at December 31, 2012 represents dividends payable to common shareholders (87,537,250 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (12,141,836 common units) for all such holders of record as of January 4, 2013 with respect to the fourth quarter 2012.  The fourth quarter 2012 common stock dividends and common unit distributions of $0.45 per common share and unit were approved by the Board of Directors on December 3, 2012.  The common stock dividends and common unit distributions payable were paid on January 11, 2013.
	Costs Incurred
	For Stock
	IssuancesCosts incurred in connection with the Company’s stock issuances are reflected as a reduction of additional paid-in capital.
	Stock
	CompensationThe Company accounts for stock compensation in accordance with the provisions of ASC 718, Compensation-Stock Compensation.  These provisions require that the estimated fair value of restricted stock (“Restricted Stock Awards”), TSR-based Performance Shares and stock options (if any) at the grant date be amortized ratably into expense over the appropriate vesting period.  The Company recorded stock compensation expense of $755,000 and $579,000 for the three months ended September 30, 2013 and 2012, respectively, and $2,402,000 and $1,971,000 for the nine months ended September 30, 2013 and 2012, respectively.
	Other
	Comprehensive
	IncomeOther comprehensive income (loss) includes items that are recorded in equity, such as unrealized holding gains or losses on marketable securities available for sale.  There was no difference in other comprehensive income to net income for the three and nine months ended September 30, 2013 and 2012,  and no accumulated other comprehensive income as of September 30, 2013 and 2012.

Real_Estate_Transactions

Real Estate Transactions	9 Months Ended
	Sep. 30, 2013
Real Estate Transactions [Abstract]
Real Estate Transactions	3.    REAL ESTATE TRANSACTIONS
	Acquisitions
	On January 18, 2013, the Company acquired Alterra at Overlook Ridge 1A (“Alterra 1A”), a 310-unit multi-family rental property located in Revere, Massachusetts, for approximately $61.3 million in cash, which was funded primarily through borrowings  under the Company’s unsecured revolving credit facility.
	On April 4, 2013, the Company acquired Alterra at Overlook Ridge IB (“Alterra 1B”), a 412-unit multi-family rental property located in Revere, Massachusetts, for approximately $88 million in cash, which was funded primarily through borrowings under the Company’s unsecured revolving credit facility.
	The purchase prices were allocated to the net assets acquired during the nine months ended September 30, 2013 as follows (in thousands):
											Total
			Alterra 1A				Alterra 1B				Acquisitions
	Land	$	9,042			$	12,055			$	21,097
	Buildings and improvements		50,671				71,409				122,080
	Furniture, fixtures and equipment		801				1,474				2,275
	In-place lease values		931	-1			3,148	-1			4,079
			61,445				88,086				149,531
	Less: Below market lease values		195	-1			136	-1			331
			195				136				331
	Net cash paid at acquisition	$	61,250			$	87,950			$	149,200
	(1) In-place lease values and below market lease values will be amortized over one year or less.
	For the nine months ended September 30, 2013, included in general and administrative expense was an aggregate of approximately $214,000 in transaction costs related to the property acquisitions.
	Consolidation
	On October 23, 2012, as part of the Roseland transaction, the Company had acquired a 26.25 percent interest in a to-be-built, 108-unit multi-family rental property located in Eastchester, New York (the “Eastchester Project”) for approximately $4.9 million.  The remaining interests in the development project-owning entity, 150 Main Street, L.L.C. (“Eastchester”) was owned 26.25 percent by JMP Eastchester, L.L.C. and 47.5 percent by Hudson Valley Land Holdings, L.L.C. (“HVLH”). The Eastchester Project is expected to start in the near term.  Estimated total development costs of $46 million are expected to be funded with a $27.5 million construction loan and the balance of $18.5 million to be funded with member capital.
	On August 22, 2013, the operating agreement of Eastchester was modified which increased the Company’s effective ownership to 76.25 percent, with the remaining 23.75 percent owned by HVLH.  The agreement also provided the Company with control of all major decisions.    Accordingly,  effective from this date, the Company is consolidating Eastchester under the provisions of ASC 810, Consolidation.  As the carrying value approximated the fair value of the net assets acquired, there was no holding period gain or loss recognized on this transaction.  The following table summarizes the net assets recorded upon consolidation (in thousands):
	Land		$	5,585
	Construction in progress			3,387
				8,972
	Cash and cash equivalents			79
	Other assets			47
	Accounts payable			-325
				-199
	Noncontrolling interest recorded upon consolidation			-1,252
	Net assets recorded upon consolidation		$	7,521
	Properties Commencing Initial Operations
	The following properties commenced initial operations during the nine months ended September 30, 2013 (dollars in thousands, except per square foot):
							Garage			Development			Development
					# of	Rentable	Parking			Costs Incurred			Costs Per
	Date	Property/Address	Location	Type	Bldgs.	Square Feet	Spaces			by Company			Square Foot
	6/5/13	14 Sylvan Way	Parsippany, New Jersey	Office	1	203,506	-		$	51,484	(a)	$	253
	8/1/13	Port Imperial South 4/5	Weehawken, New Jersey	Parking/Retail	1	16,736	850			71,107	(b)		N/A
	Totals				2	220,242	850		$	122,591
	(a)Development costs included approximately $13.0 million in land costs and $4.3 million in leasing costs.  Amounts are as of September 30, 2013.
	(b)Development costs included approximately $13.1 million in land costs.  Amounts are as of September 30, 2013.
	Property Sales
	On August 27, 2013, the Company completed the sale of its 1.66 million square foot Pennsylvania office portfolio and three developable land parcels for approximately $233 million: $201 million in cash, a $10 million mortgage on one of the properties ($8 million of which was funded at closing) and subordinated equity interests in each of the properties being sold with capital accounts aggregating $22 million.   Net sale proceeds from the sale aggregated $207 million which was comprised of the $233 million gross sales price less the subordinated equity interests of $22 million and $4 million in closing costs. As of September 30, 2013, approximately $55.3 million of the cash received from the sale was being held by a qualified intermediary pending reinvestment, which is a noncash item included in deferred charges, goodwill and other assets.  The purchasers of the Pennsylvania office portfolio are joint ventures formed between the Company and affiliates of the Keystone Property Group (the “Keystone Affiliates”). The mortgage loan has a term of two years with a one year extension option and bears interest at LIBOR plus six percent.  The Company's equity interests in the joint ventures will be subordinated to Keystone Affiliates receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a ten percent IRR on its subordinated equity and then all profit will be split equally.    In connection with these partial sale transactions, because the buyer receives a preferential return, the Company only recognized profit to the extent that they received net proceeds in excess of their entire carrying value of the properties, effectively reflecting their retained subordinate equity interest at zero.
	As part of the transaction, the Company has rights to own, after zoning-approval-subdivision, land at the 150 Monument Road property located in Bala Cynwyd, Pennsylvania, for a contemplated multi-family residential development.
	The Company sold the following office properties during the nine months ended September 30, 2013 (dollars in thousands):  See Note 7: Discontinued Operations.
					Rentable			Net			Net
	Sale			# of	Square			Sales			Book		Realized
	Date	Property/Address	Location	Bldgs.	Feet			Proceeds			Value		Gain (loss)
	4/10/13	19 Skyline Drive (a)	Hawthorne, New York	1	248,400		$	16,131		$	16,005	$	126
	4/26/13	55 Corporate Drive	Bridgewater, New Jersey	1	204,057			70,967			51,308		19,659
	5/2/13	200 Riser Road	Little Ferry, New Jersey	1	286,628			31,775			14,852		16,923
	5/13/13	777 Passaic Avenue	Clifton, New Jersey	1	75,000			5,640			3,713		1,927
	5/30/13	16 and 18 Sentry Parkway West (b)	Blue Bell, Pennsylvania	2	188,103			19,041			19,721		-680
	5/31/13	51 Imclone Drive (c)	Branchburg, New Jersey	1	63,213			6,101			5,278		823
	6/28/13	40 Richards Avenue	Norwalk, Connecticut	1	145,487			15,858			17,027		-1,169
	7/10/13	106 Allen Road	Bernards Township, New Jersey	1	132,010			17,677			13,522		4,155
	8/27/13	Pennsylvania office portfolio (d) (e)	Suburban Philadelphia, Pennsylvania	15	1,663,511			207,425			164,259		43,166
	Totals:			24	3,006,409		$	390,615		$	305,685	$	84,930
	(a)	The Company recognized a valuation allowance of $7.1 million on this property at December 31, 2012.  In connection with the sale, the Company provided an interest-free note receivable to the buyer of $5 million (with a net present value of $3.6 million at September 30, 2013) which matures in ten years and requires monthly payments of principal.  See Note 5: Deferred charges, goodwill and other assets.
	(b)	The Company recorded an $8.4 million impairment charge on these properties at December 31, 2012.  The Company has retained a subordinated interest in these properties.
	(c)	The property was encumbered by a mortgage loan which was satisfied by the Company at the time of the sale.  The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations:  loss from early extinguishment of debt for the nine months ended September 30, 2013.
	(d)	In order to reduce the carrying value of five of the properties to their estimated fair market values, the Company recorded impairment charges of $23.9 million at June 30, 2013.  The fair value used in the impairment charges was based on the purchase and sale agreement for the properties ultimately sold.
	(e)	The portfolio sale also included three developable land parcels.
	Impairments
	Nine of the Company’s office properties located in Roseland, Parsippany, Warren and Lyndhurst, New Jersey, aggregating approximately 1.3 million square feet, are collateral for mortgage loans scheduled to mature on August 11, 2014 and May 11, 2016, with principal balances totaling $159.2 million as of September 30, 2013. As of September 30, 2013, the Company estimated that the carrying value of the properties may not be recoverable over their anticipated holding periods.  In order to reduce the carrying value of the properties to their estimated fair market values, the Company recorded impairment charges of $48.5 million at September 30, 2013, which resulted from the current decline in leasing activity and market rents of the properties identified.  The Company’s estimated fair values were derived utilizing a discounted cash flow (“DCF”) model including all estimated cash inflows and outflows over a specified holding period.  These cash flows were comprised of inputs which included contractual revenues and forecasted revenues and expenses based upon market conditions and expectations for growth.  The capitalization rate of 8.5 percent and discount rates ranging from 10 percent to 15 percent utilized in DCF were based upon the risk profile of the properties’ cash flows and observable rates that the Company believes to be within a reasonable range of current market rates for each respective property.  Based on these inputs the Company determined that its valuation of these investments was classified within Level 3 of the fair value hierarchy, as provided by ASC 820, Fair Value Measurements and Disclosures.

Investments_In_Unconsolidated_

Investments In Unconsolidated Joint Ventures	9 Months Ended
	Sep. 30, 2013
Investments In Unconsolidated Joint Ventures [Abstract]
Investments In Unconsolidated Joint Ventures	4.    INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES
	As of September 30, 2013, the Company had an aggregate investment of approximately $131.9 million in its equity method joint ventures.  The Company formed these ventures with unaffiliated third parties, or acquired interests in them, to develop or manage primarily office and multi-family rental properties, or to acquire land in anticipation of possible development of office and multi-family rental properties.  As of September 30, 2013, the unconsolidated joint ventures owned: 20 office and two retail properties aggregating approximately 2.3 million square feet, seven multi-family properties totaling 2,597 apartments, a 350-room hotel, a senior mezzanine loan position in the capital stack of a 1.7 million square foot commercial property; development projects for up to approximately 2,631 apartments; and interests and/or rights to developable land parcels able to accommodate up to 3,708 apartments, and 1.2 million square feet of office space.  The Company’s unconsolidated interests range from 7.5 percent to 80 percent subject to specified priority allocations in certain of the joint ventures.
	The amounts reflected in the following tables (except for the Company’s share of equity in earnings) are based on the historical financial information of the individual joint ventures.  The Company does not record losses of the joint ventures in excess of its investment balances unless the Company is liable for the obligations of the joint venture or is otherwise committed to provide financial support to the joint venture.  The outside basis portion of the Company’s joint ventures is amortized over the anticipated useful lives of the underlying ventures’ tangible and intangible assets acquired and liabilities assumed.  Unless otherwise noted below, the debt of the Company’s unconsolidated joint ventures generally is non-recourse to the Company, except for customary exceptions pertaining to such matters as intentional misuse of funds, environmental conditions, and material misrepresentations.  The Company had $856,000 and $370,000 in accounts receivable due from its unconsolidated joint ventures as of September 30, 2013 and December 31, 2012, respectively.
	Included in the Company’s investments in unconsolidated joint ventures as of September 30, 2013 are five unconsolidated development joint ventures, which are VIEs for which the Company is not the primary beneficiary. These joint ventures are primarily established to develop real estate property for long-term investment and were deemed VIEs primarily based on the fact that the equity investment at risk was not sufficient to permit the entities to finance their activities without additional financial support.  The initial equity contributed to these entities was not sufficient to fully finance the real estate construction as development costs are funded by the partners throughout the construction period.  The Company determined that it was not the primary beneficiary of these VIEs based on the fact that the Company has shared control of these entities along with the entity’s partners and therefore does not have controlling financial interests in these VIEs.  The Company’s aggregate investment in these VIEs was approximately $10.7 million as of September 30, 2013.  The Company’s maximum exposure to loss as a result of its involvement with these VIEs is estimated to be approximately $13.7 million, which includes the Company’s current investment and estimated future funding commitments of approximately $3.1 million.  The Company has not provided financial support to these VIEs that it was not previously contractually required to provide. In general, future costs of development not financed through third party will be funded with capital contributions from the Company and its outside partners in accordance with their respective ownership percentages.
	The following is a summary of the financial position of the unconsolidated joint ventures in which the Company had investment interests as of September 30, 2013 and December 31, 2012: (dollars in thousands)
				September 30,			December 31,
				2013			2012
	Assets:
	Rental property, net		$	736,487		$	180,254
	Loan receivable			44,459			42,276
	Other assets			434,714			311,847
	Total assets		$	1,215,660		$	534,377
	Liabilities and partners'/
	members' capital:
	Mortgages and loans payable		$	600,473		$	168,908
	Other liabilities			71,552			12,141
	Partners'/members' capital			543,635			353,328
	Total liabilities and
	partners'/members' capital		$	1,215,660		$	534,377
	The following is a summary of the Company's investments in unconsolidated joint ventures as of September 30, 2013 and December 31, 2012: (dollars in thousands)
			September 30,			December 31,
	Entity		2013			2012
	Plaza VIII & IX Associates, L.L.C.	$	4,065		$	4,321
	South Pier at Harborside		-2,095			-1,225
	Red Bank Corporate Plaza, L.L.C.		3,972			3,876
	12 Vreeland Associates, L.L.C.		5,439			12,840
	Boston Downtown Crossing		-			13,012
	Gale Jefferson, L.L.C.		-			1,029
	Stamford SM LLC		35,667			34,006
	Marbella RoseGarden, L.L.C.		15,976			16,918
	RoseGarden Monaco Holdings, L.L.C.		3,524			4,761
	Rosewood Lafayette Holdings, L.L.C.		1,119			1,988
	PruRose Port Imperial South 15, LLC		-			606
	Rosewood Morristown, L.L.C.		6,603			7,091
	Overlook Ridge JV, L.L.C.		178			31
	Overlook Ridge, L.L.C.		-			-
	Overlook Ridge JV 2C/3B, L.L.C.		-			179
	Roseland/North Retail, L.L.C.		1,967			2,161
	BNES Associates III		1,708			1,955
	Portside Master Company, L.L.C.		3,449			3,651
	PruRose Port Imperial South 13, LLC		2,451			2,920
	Roseland/Port Imperial Partners, L.P.		2,755			2,582
	RoseGarden Marbella South, L.L.C.		7,160			6,182
	PruRose Riverwalk G, L.L.C.		3,515			4,136
	Elmajo Urban Renewal Associates, LLC		232			629
	Estuary Urban Renewal Unit B, LLC		74			220
	RiverPark at Harrison I, L.L.C.		3,404			2,606
	150 Main Street, L.L.C.		-			2,395
	RoseGarden Monaco, L.L.C.		1,208			1,165
	Hillsborough 206 Holdings, L.L.C.		1,989			1,967
	Grand Jersey Waterfront Urban Renewal Associates, L.L.C.		397			337
	Crystal House Apartments Investors LLC		26,928			-
	Other		174			-
	Company's investment in unconsolidated joint ventures	$	131,859		$	132,339
	The following is a summary of the results from operations of the unconsolidated joint ventures for the period in which the Company had investment interests during the three and nine months ended September 30, 2013 and 2012: (dollars in thousands)
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2013			2012			2013		2012
	Total revenues	$	99,117		$	17,311		$	202,810	$	44,369
	Operating and other expenses		-48,621			-9,169			-137,889		-25,428
	Depreciation and amortization		-11,556			-2,497			-24,730		-7,285
	Interest expense		-3,934			-1,675			-9,256		-5,017
	Net income	$	35,006		$	3,970		$	30,935	$	6,639
	The following is a summary of the Company’s equity in earnings (loss) of unconsolidated joint ventures for the three and nine months ended September 30, 2013 and 2012: (dollars in thousands)
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
Entity		2013			2012			2013		2012
Plaza VIII & IX Associates, L.L.C.	$	24		$	21		$	52	$	43
South Pier at Harborside		835			1,080			1,380		1,884
Red Bank Corporate Plaza, L.L.C.		99			94			306		298
12 Vreeland Associates, L.L.C.		-25			279			-1		603
Boston Downtown Crossing		-			-6			646		-333
Gale Jefferson, L.L.C.		-			23			68		63
Stamford SM LLC		1,023			927			2,805		2,193
Marbella RoseGarden, L.L.C.		-170			-			-446		-
RoseGarden Monaco Holdings, L.L.C.		-416			-			-1,238		-
Rosewood Lafayette Holdings, L.L.C.		-295			-			-869		-
PruRose Port Imperial South 15, LLC		-			-			-606		-
Rosewood Morristown, L.L.C.		-152			-			-393		-
Overlook Ridge JV, L.L.C.		-			-			-		-
Overlook Ridge, L.L.C.		-			-			-		-
Overlook Ridge JV 2C/3B, L.L.C.		53			-			204		-
Roseland/North Retail, L.L.C.		-62			-			-194		-
BNES Associates III		-37			-			-108		-
Portside Master Company, L.L.C.		-109			-			-222		-
PruRose Port Imperial South 13, LLC		-181			-			-459		-
Roseland/Port Imperial Partners, L.P.		-			-			-		-
RoseGarden Marbella South, L.L.C.		-20			-			-57		-
PruRose Riverwalk G, L.L.C.		-198			-			-576		-
Elmajo Urban Renewal Associates, LLC		-87			-			-255		-
Estuary Urban Renewal Unit B, LLC		-44			-			-107		-
RiverPark at Harrison I, L.L.C.		-			-			-		-
150 Main Street, L.L.C.		-			-			-		-
RoseGarden Monaco, L.L.C.		-			-			-		-
Hillsborough 206 Holdings, L.L.C.		-			-			-		-
Grand Jersey Waterfront Urban Renewal Associates, L.L.C.		-			-			-		-
Crystal House Apartments Investors LLC		-1,149			-			-2,671		-
Other		682						682
Company's equity in earnings of unconsolidated joint ventures	$	-229		$	2,418		$	-2,059	$	4,751
Plaza VIII and IX Associates, L.L.C.
The Company has a joint venture with Columbia Development Company, L.L.C. (“Columbia”), which owns land for future development currently used as a parking facility and located on the Hudson River waterfront in Jersey City, New Jersey, adjacent to the Company’s Harborside complex.  The Company holds a 50 percent interest in the venture.
South Pier at Harborside – Hotel
The Company has a joint venture with Hyatt Corporation (“Hyatt”) which owns a 350-room hotel on the South Pier at Harborside, Jersey City, New Jersey.  The Company holds a 50 percent interest in the venture.
The venture has a non-recourse mortgage loan with a balance as of September 30, 2013 of $63.1 million collateralized by the hotel property.  The loan carries an interest rate of 6.15 percent and matures in November 2016.  The venture also has a loan with a balance as of September 30, 2013 of $4.6 million with the City of Jersey City, provided by the U.S. Department of Housing and Urban Development.  The loan currently bears interest at fixed rates ranging from 6.09 percent to 6.62 percent and matures in August 2020.  The Company has posted a $4.6 million letter of credit in support of this loan, half of which is indemnified by Hyatt.
Red Bank Corporate Plaza, L.L.C.
The Company has a joint venture with The PRC Group, which owns Red Bank Corporate Plaza, a 92,878 square foot office building located in Red Bank, New Jersey.  The property is fully leased to Hovnanian Enterprises, Inc. through September 30, 2017.  The Company holds a 50 percent interest in the venture.
The venture has a $16.8 million mortgage loan collateralized by the office property, which bears interest at a rate of the London Interbank Offered Rate (“LIBOR”) plus 300 basis points and matures in May 2016.  LIBOR was 0.18 percent at September 30, 2013.  The loan includes contingent guarantees for a portion of the principal by the Company based on certain conditions.  On September 22, 2011, the interest rate on 75 percent of the loan was fixed at 3.99375 percent effective from October 17, 2011 through maturity.
The Company performed management, leasing, and other services for the property owned by the joint venture and recognized $26,000 and $25,000 in fees for such services in the three months ended September 30, 2013 and 2012, respectively, and $80,000 and $75,000 for the nine months ended September 30, 2013 and 2012, respectively.
12 Vreeland Associates, L.L.C.
The Company entered into a joint venture to form M-C Vreeland, LLC (“M‑C Vreeland”), which acquired a 50 percent interest in 12 Vreeland Associates, L.L.C., which owns a 139,750 square foot office property located at 12 Vreeland Road, Florham Park, New Jersey.
On June 18, 2013, 12 Vreeland Associates, L.L.C. obtained a mortgage loan which is collateralized by its office property.  The amortizable loan with a balance of $15.8 million as of September 30, 2013 bears interest at 2.87 percent and matures on July 2023.  The venture subsequently distributed $14.8 million of the loan proceeds, of which the Company’s share was $7.4 million.
The operating agreement of M-C Vreeland provides, among other things, for the Participation Rights (see Note 16: Noncontrolling Interests in Subsidiaries – Participation Rights).
Boston Downtown Crossing
The Company had a joint venture with affiliates of Vornado Realty LP (“Vornado”) and JP Morgan Chase Bank (“JPM”), which was created to acquire and redevelop the Filenes property located in the Downtown Crossing district of Boston, Massachusetts (the “Filenes Property”).  The venture was organized in contemplation of developing and converting the Filenes Property into a condominium consisting of a retail unit, an office unit, a parking unit, a hotel unit and a residential unit, aggregating 1.2 million square feet.  The Company, through subsidiaries, separately holds approximately a 15 percent indirect ownership interest in each of the units.  The project is subject to governmental approvals.
On April 23, 2013, the Company and JPM sold their interests in the venture for $45 million, of which the Company’s share was $13.5 million.  The Company realized its share of the gain on the sale of $754,000 which is included in equity in earnings.
Gale Jefferson, L.L.C.
The Company had a joint venture with a Gale Affiliate to form M-C Jefferson, L.L.C. (“M-C Jefferson”) which owned an 8.33 percent indirect interest in One Jefferson Road LLC (“One Jefferson”), which developed and managed a 100,010 square foot office property at One Jefferson Road, Parsippany, New Jersey (the “Jefferson Property”).  The property is fully leased to a single tenant through August 2025.
One Jefferson had a loan in the amount of $20.2 million, which bore interest at a rate of LIBOR plus 160 basis points and was scheduled to mature in October 2013.  On January 4, 2013, Gale Jefferson, L.L.C. sold its membership interest to JPM for $3.2 million, of which the Company’s share was $1.1 million.  The Company realized its share of the gain on the sale of $69,000 which is included in equity in earnings.
The Company performed management, leasing, and other services for the Jefferson Property and recognized zero and $48,000 in income for such services in the three months ended September 30, 2013 and 2012, respectively, and zero and $144,000 for the nine months ended September 30, 2013 and 2012, respectively.
Stamford SM LLC
On February 17, 2012, the Company entered into a joint venture to form Stamford SM LLC (“Stamford SM”) which acquired a senior mezzanine loan (the “Mezz Loan”) position in the capital stack of a 1.7 million square foot class A portfolio in Stamford, Connecticut for $40 million.  The Mezz Loan has a face value of $50 million and is secured by the equity interests in a seven-building portfolio containing 1.67 million square feet of class A office space and 106 residential rental units totaling 70,500 square feet, all located in the Stamford Central Business District.  The interest-only Mezz Loan has a carrying value of $44.3 million as of September 30, 2013.  The Mezz Loan is subject to an agreement, which provides subject to certain conditions, that principal proceeds above $47 million are paid to another party.  The Mezz Loan bears interest at LIBOR plus 325 basis points and matures in August 2014.
The operating agreement of Stamford SM provides, among other things, for distributions of net available cash in accordance with its members’ respective ownership percentages.  The Company holds an 80 percent interest in the venture.  The Company and the 20 percent member share equally in decision-making on all major decisions involving the operations of the venture.
Marbella RoseGarden, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 24.27 percent indirect residual interest in an entity that owns a 412-unit, 40-story multi-family rental property which aggregates 369,607 square feet and is located in Jersey City, New Jersey (the “Marbella Property”).
The Company owns 48.5325 percent of Marbella RoseGarden, L.L.C. (“RoseGarden”) with the remaining interest owned by MG Marbella Partners, L.L.C.
RoseGarden owns a 50 percent interest in the property-owning entity, PruRose/Marbella I, L.L.C. (“PruRose/Marbella”), with the remaining interest owned by Prudential-Marbella Partnership (“Prudential-Marbella”).
In general, the operating agreement of PruRose/Marbella provides that operating cash flows are distributed to members first to Prudential-Marbella and then to RoseGarden based on a 9.5 percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential-Marbella had a capital balance of $7.6 million and RoseGarden had a capital balance of $0.1 million.  There was no accumulated unpaid operating return as of September 30, 2013.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
In general, the operating agreement of RoseGarden provides for the distribution of available cash flow to the members in accordance with their ownership percentages.
PruRose/Marbella has a mortgage loan, with a balance of $95 million as of September 30, 2013, which bears interest at 4.99 percent and matures in May 2018.  The interest-only loan is collateralized by the Marbella Property.
The Company performed management, leasing, and other services for PruRose/Marbella and recognized $83,000 and $262,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
RoseGarden Monaco Holdings, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 15 percent indirect residual interest in an entity that owns two 50-story multi-family rental properties with 523 units (the “Monaco Property”). The Monaco Property aggregates 477,254 square feet and is located in Jersey City, New Jersey.
The Company owns 50 percent of RoseGarden Monaco Holdings L.L.C. (“RoseGarden Monaco”) with the remaining interest owned by MG Monaco, L.L.C.  RoseGarden Monaco holds a 60 percent interest in Monaco Holdings, L.L.C. (“Monaco Holdings”) with the remaining interest owned by Hudson Hotel Monaco L.L.C.
Monaco Holdings owns a 50 percent interest in the property-owning entity, PruRose Monaco Holdings, L.L.C. (“PruRose Monaco”) with the remaining interest owned by The Prudential Insurance Company of America (“Prudential”).
In general, the operating agreement of PruRose Monaco provides that operating cash flows are distributed to members first to Prudential and then to Monaco Holdings based on a nine percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential had a capital balance of $76 million and an accumulated unpaid operating return of $3.4 million.  It is not anticipated that Monaco Holdings will be required to fund any capital.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
The operating agreement of Monaco Holdings provides, among other things, for the distributions of net cash flows to the members, first, in respect of unrecovered capital on a pro rata basis, with any remaining cash flow in accordance with their ownership percentages.
The operating agreement of RoseGarden Monaco provides, among other things, for the distribution of available cash flow to the members in accordance with their ownership percentages.
PruRose Monaco has an interest-only mortgage loan, collateralized by the property with a balance of $165 million as of September 30, 2013.  The mortgage loan bears interest at 4.19 percent and matures in February 2021.
The Company performed management, leasing, and other services for PruRose Monaco and recognized $115,000 and $350,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
Rosewood Lafayette Holdings, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 25 percent indirect residual interest in an entity that owns a 217-unit multi-family rental property which aggregates 185,733 square feet and is located in Morristown, New Jersey (the “Highlands Property”).
The Company owns 50 percent of Rosewood Lafayette Holdings, L.L.C. (“Rosewood”) with the remaining interest owned by Woodmont Transit Village, L.L.C.
Rosewood owns a 50 percent interest in the property-owning entity, Rosewood Lafayette Commons, L.L.C. (“Rosewood Lafayette”) with the remaining interest owned by Prudential.
In general, the operating agreement of Rosewood Lafayette provides that operating cash flows are distributed to members first to Prudential and then to Rosewood based on an eight percent operating return to December 23, 2012 and nine percent thereafter on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential had a capital balance of $29.5 million and an accumulated unpaid operating return of $2.1 million.  It is not anticipated that Rosewood will be required to fund any capital.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
In general, the operating agreement of Rosewood provides for the distribution of available cash flow to the members in accordance with their ownership percentages.
Rosewood Lafayette has a mortgage loan, with a balance of $39.5 million as of September 30, 2013, which bears interest at 4.0 percent and matures in July 2015.  The loan requires principal and interest payments based on a 30-year amortization schedule and is collateralized by the Highlands Property.
The Company performed management, leasing, and other services for Rosewood Lafayette and recognized $48,000 and $142,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
PruRose Port Imperial South 15, LLC
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 50 percent residual interest in PruRose Port Imperial South 15, LLC (“Port Imperial 15”), an entity that owns a 236-unit multi-family rental property which aggregates 214,402 square feet and is located in Weehawken, New Jersey (the “RiversEdge Property”).
Port Imperial 15 is owned 50 percent by the Company and 50 percent by PRII Port Imperial South 15, LLC (“Prudential-Port”).
In general, the operating agreement of Port Imperial 15 provides that operating cash flows are distributed to members first to Prudential-Port and then to the Company based on a nine percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential-Port had a capital balance of $33.8 million and an accumulated unpaid operating return of $5.1 million.  It is not anticipated that the Company will be required to fund any capital.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
Subject to a letter agreement, 20 percent of distributions received by the Company, in excess of an eight percent IRR shall be paid to a third party based on certain conditions.
Port Imperial 15 had a mortgage loan, with a balance of $57 million which bore interest at LIBOR plus 235 basis points and was scheduled to mature in August 2013.  On August 29, 2013, Port Imperial 15 refinanced such mortgage loan.  The new loan has a balance of $57.5 million as of September 30, 2013, bears interest at 4.32 percent and matures in September 2020.   The interest-only loan is collateralized by the RiversEdge Property.
The Company performed management, leasing, and other services for Port Imperial 15 and recognized $62,000 and $185,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
Rosewood Morristown, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 50 percent interest in Rosewood Morristown, L.L.C. (“Rosewood”) with the remaining interest owned by Woodmont Epsteins, L.L.C.
Rosewood owns a 50 percent interest in Morristown Epsteins, L.L.C. (“Morristown”) with the remaining 50 percent owned by a third party. Morristown owns an interest in a 76-unit-for-sale luxury condominium community (the “40 Park Condominiums Property”), three of which were unsold at acquisition, all of which have been sold as of September 30, 2013.  Morristown also owns land where it intends to build a 91-unit, seven-story, multi-family rental property (the “Lofts at 40 Park Property”).  Morristown also owns a 50 percent residual interest in the entity that owns a 130-unit multi-family rental and 10,730 square feet retail building (the “Metropolitan Property”) and a 50,973 square feet retail building (the “Shops at 40 Park Property”), Epsteins B Rentals, L.L.C. (“Epsteins”), with the remaining interest owned by Prudential.  All of the properties are located in Morristown, New Jersey.
The operating agreement of Morristown provides, among other things, for the distribution of net available cash to the members, as follows:
·	to pay accrued and unpaid interest at a rate of eight percent on the balance note, as defined;
·	to Rosewood in an amount equal to its current year’s annual preferred return rate of eight percent on its adjusted capital, as defined;
·	to pay the outstanding balance remaining on the balance note, which was $975,000 as of September 30, 2013;
·	to Rosewood in an amount equal to its adjusted capital balance, which was $3.2 million as of September 30, 2013; and
·	to the members in accordance with their ownership percentages.
The operating agreement of Rosewood provides, among other things, for the distribution of net cash flow to the members in accordance with their ownership percentages.
PR II/Morristown Prudential, LLC, an affiliate of Prudential, has a 15 percent participating interest in the net sales proceeds from the sale of the 40 Park Condominiums Property units, as defined, pursuant to an August 2011 Participation Agreement, related to a previously satisfied mezzanine loan.
In general, the operating agreement of Epsteins provides that operating cash flows are distributed to members first to Prudential and then to Rosewood based on a nine percent return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages. As of September 30, 2013, Prudential had a capital balance of $19.1 million and an accumulated unpaid operating return of $203,000, and Rosewood had a capital balance of $0.7 million and no accumulated unpaid operating returns as of September 30, 2013.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return balance and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
Epsteins had a mortgage loan with a balance of $48.5 million bearing interest at LIBOR plus 275 basis points which was refinanced on August 14, 2013 with loan proceeds and Prudential Capital.  The new loan, collateralized by the Metropolitan Property, with a balance of $38.6 million bearing interest at 3.25 percent matures in September 2020 and is interest-only through September 2015.  The new loan, collateralized by the Shops at 40 Park Property, with a balance of $6.5 million bearing interest at 3.63 percent matures in August 2018 and is interest-only through July 2015.  The loan provides for additional proceeds of $1 million based on certain operating thresholds being achieved.
Morristown has a mortgage loan, with a balance of $1.1 million as of September 30, 2013, which bears interest at LIBOR plus 250 basis points and matures in September 2014.  The loan is collateralized by the Lofts at 40 Park Property and is fully guaranteed by the Company.
The Company performed management, leasing, and other services for Epsteins and recognized $47,000 and $134,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
Overlook Ridge JV, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 25 percent indirect interest in an entity that owns a 251-unit multi-family rental property (“Quarrystone I Property”) and a 50 percent indirect interest in an entity that owns a land parcel located in Malden, Massachusetts (“Overlook Phase III”).  The Quarrystone I Property aggregates 278,721 square feet and is located in Malden, Massachusetts.
The Company owns 50 percent of Overlook Ridge JV, L.L.C. (“Overlook Ridge JV”) with the remaining interest owned by Rowe Contracting Company (“Rowe”).
Overlook Ridge JV owns a 50 percent interest in the property-owning entity, LR JV-C Associates, L.L.C. (“LR Overlook”) with the remaining interest owned by Lennar Massachusetts Properties Inc. (“Lennar”) and a 100 percent interest in the property-owning entity LR Overlook Phase III, L.L.C. (“LR Overlook Phase III”).
In general, the operating agreement of LR Overlook provides, among other things, for distributions of cash flow to the members in accordance with their ownership percentages, subject to the repayment of priority partnership loans.  As of September 30, 2013, Lennar has a priority partnership loan of $18.8 million, which has an accrued interest balance of $14.4 million.
The operating agreement of Overlook Ridge JV provides, among other things, for the distribution of distributable cash, as defined, to the members, as follows:
·	First, to the members in proportion to their respective unrecovered capital percentages, as defined in the agreement, until each member’s unrecovered capital has been reduced to zero; and
·	Second, to the members in accordance with their ownership percentages.
LR Overlook has mortgage loans, with a balance of $69.9 million as of September 30, 2013, which mature in March 2016.  The senior loan, with a balance of $52.9 million, which bears interest at LIBOR plus 200 basis points is collateralized by the Quarrystone I property.  The junior loan, with a balance of $17 million, which bears interest at LIBOR plus 90 basis points is collateralized by a $17 million letter of credit provided by an affiliate of Lennar.
LR Overlook Phase III has a mortgage loan, with a balance of $5.6 million as of September 30, 2013, which bears interest at a rate of LIBOR plus 250 basis points and matures in April 2015.  The loan provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.  The interest-only loan is collateralized by the Overlook Phase III Land.  The Company has guaranteed repayment of up to $1.5 million and all interest under the loan.
The Company performed management, leasing, and other services for LR Overlook and recognized $46,000 and $137,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
Overlook Ridge, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 50 percent interest in land parcels at Overlook Ridge, L.L.C. (“Overlook Ridge”), referred to as Sites IIIA, IIIC, and IIID (“Overlook Land”), which are located in Malden and Revere, Massachusetts.  The remaining interest in the property-owning entity, Overlook Ridge, is owned by Rowe.
The operating agreement of Overlook Ridge provides, among other things, for the distribution of net cash flow to the members, as follows:
·	First, to the members in proportion to their unrecovered capital percentages, as defined, until the cumulative amounts distributed  equal such member’s return of six percent on the unrecovered capital; and
·	Second, to the members in accordance with their ownership percentages.
In addition, the operating agreement provides that both Rowe and the Company receive a notional land capital account based on the development of each Overlook Land, as defined.  Based on the anticipated development of each remaining Overlook Land, the total notional land capital account is approximately $20 million, and is allocated 97 percent to Rowe and three percent to the Company.
Overlook Ridge has a mortgage loan collateralized by Overlook Land, not to exceed $17.4 million, with a balance of $16.5 million as of September 30, 2013.  The loan bears interest at a rate of LIBOR plus 350 basis points and matures in March 2014.  The loan provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.  The Company has guaranteed repayment of the outstanding principal balance of the loan.
Overlook Ridge JV 2C/3B, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 25 percent indirect residual interest in a to-be-built, 371-unit multi-family rental development spanning four buildings (the “Overlook 2C/3B Project”) which is located in Malden, Massachusetts.  Construction began in January 2013 with anticipated initial deliveries in the first quarter 2014.
The Company owns a 50 percent interest in Overlook Ridge JV 2C/3B, L.L.C. (“Overlook 2C/3B”) with the remaining interest owned by Rowe.  Overlook 2C/3B owns a 50 percent interest in the development project-owning entity, Overlook Ridge Apartments Investors LLC (“Overlook Apartments Investors”) with the remaining interests owned by Overlook Ridge Apartments Member LLC (“Overlook Apartments Member”).  Pursuant to the operating agreement Overlook Apartments Member is required to fund $23.9 million of the total development costs of $79.4 million, with the balance to be funded by a $55.5 million construction loan.
In general, the operating agreement of Overlook Apartments Investors provides that operating cash flows are distributed to members first to Overlook Apartments Member and then to Overlook 2C/3B based on a 6.5 percent preferred return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Overlook Apartments Member had a capital balance of $23.9 million with an accumulated unpaid preferred return of $1.1 million.  It is anticipated that Overlook 2C/3B will not be required to fund any capital.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid preferred return, then to repay each members’ capital balance in the same priority as operating cash flows, then 100 percent to Overlook Apartments Member until it receives a nine percent IRR, and then 70 percent to Overlook Apartments Member and 30 percent to Overlook 2C/3B, pari passu, until Overlook Apartments Member receives an 11 percent IRR, as defined, with any excess distributed to the members in accordance with their ownership percentages.
Overlook 2C/3B and its affiliates are restricted from commencing any new residential real property development at Overlook Ridge until January 2015, without the prior written consent of Overlook Apartments Member.  Thereafter, Overlook Apartments Member has a right of first offer to participate in future Overlook Ridge Projects, all as more fully set forth in the operating agreement of Overlook Ridge Apartments Investors.
Overlook Apartments Investors has a construction loan not to exceed $55.5 million with a balance of $5.2 million as of September 30, 2013, which bears interest at LIBOR plus 250 basis points and matures in December 2015.  The loan provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points each.  The Company has guaranteed lien-free completion of the project to the lender and Overlook Apartments Member.  The Company has also guaranteed repayment of $8.3 million of the loan.  Upon the project achieving a debt service coverage ratio of 1.25, as defined, the repayment guaranty ends.  Additionally, the Company has guaranteed payment of all interest due under the loan.  On January 18, 2013, the interest rate on an amount not expected to exceed 95 percent of the outstanding loan balance was fixed at 3.0875 percent from September 3, 2013 to November 2, 2015.
The operating agreement of Overlook 2C/3B provides, among other things, for the distribution of net operating cash flow to the members, as follows:
·	First, to each member in proportion to and to the extent of such member’s unrecovered return of nine percent on unrecovered capital; and
·	Second, to the members in accordance with their ownership percentages.
Rowe has an unrecovered notional capital account balance of $7.2 million and the Company has an unrecovered capital account with $0.2 million associated with its land capital as of September 30, 2013.
The Company performed development, management, and other services for Overlook Apartments Investors and recognized $209,000 and $387,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
Roseland/North Retail, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 20 percent residual interest in Port Imperial North Retail, L.L.C. (“PI North Retail”), an entity that owns commercial condominium units (the “Riverwalk Property”), with the remaining interest owned by PR II Port Imperial Retail, LLC (“Prudential-PI”).  The Riverwalk Property aggregates 30,745 square feet of retail space and is located in West New York, New Jersey.
In general, the operating agreement of PI North Retail provides that operating cash flows are distributed first to Prudential-PI and then to the Company based on a nine percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with ownership percentages.  As of September 30, 2013, Prudential-PI had a capital balance of $4.3 million and an accumulated unpaid operating return of $1.6 million and the Company had no capital balance.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
The Company performed management, leasing, and other services for PI North Retail and recognized $8,000 and $23,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
BNES Associates III
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 31.25 percent indirect interest in an entity that owns a 106,345 square foot fully-leased office property located in West Orange, New Jersey.
The Company owns 50 percent of BNES Associates III (“BNES”) with the remaining interest owned by L.A.H. Partners Crystal Lake, L.L.C.  BNES owns a 62.50 percent interest in the property-owning entity, The Offices at Crystal Lake, L.L.C. (“Crystal Lake”).
The operating agreement of Crystal Lake provides, among other things, for the distribution of net cash flow to the members in accordance with their percentage interests.
Crystal Lake has a mortgage loan, with a balance of $7.5 million as of September 30, 2013 collateralized by the office property, which bears interest at 4.76 percent and matures in November 2023.
Portside Master Company, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 38.25 percent indirect residual interest in a to-be-built, 176-unit multi-family rental property (“Portside at Pier One Building Seven Project”).  The Portside at Pier One Building Seven Project is located in East Boston, Massachusetts and began construction in December 2012 with anticipated initial deliveries in the third quarter 2014.  The project is subject to a ground lease with the Massachusetts Port Authority.  The ground lease provides for fixed and percentage rent.
The Company owns 85 percent of Portside Master Company, L.L.C. (“Portside Master”) with the remaining interest owned by Portside Boston, L.L.C.  Portside Master holds a 45 percent interest in the development project-owning entity, Portside Apartment Holdings, L.L.C. (“Portside Apartment Holdings”) with the remaining interest owned by PR II Portside Investors L.L.C. (“Prudential Portside”).  Pursuant to the operating agreement, Prudential Portside is required to fund $23.8 million of the estimated total development costs of $66.3 million, with the balance to be funded by a $42.5 million construction loan.
In general, the operating agreement of Portside Apartment Holdings provides that operating cash flows are distributed to members first to Prudential Portside and then to Portside Master based on a nine percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential Portside had a capital balance of $16.8 million and an unpaid operating return of $0.6 million.  It is anticipated that Portside Master will not be required to fund any capital.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return, then to repay each members’ capital balance in the same priority as operating cash flows, and then 65 percent to Prudential Portside and 35 percent to Portside Master, pari passu, until Prudential Portside receives a 12 percent IRR, as defined, with any excess distributed to the members in accordance with their ownership percentages.
The operating agreement of Portside Master provides, among other things, for the distribution of net cash flow to the members in accordance with their ownership percentages.
Portside Apartment Holdings has a construction loan in an amount not to exceed $42.5 million with no balance at September 30, 2013, which bears interest at LIBOR plus 250 basis points and matures in December 2015.  The loan provides, subject to certain conditions, two one-year extension options with a fee of 12.5 basis points for year one and 25 basis points for year two.  The Company has guaranteed lien-free completion of the project to the lender, Prudential Portside and Massachusetts Port Authority.  The Company has also guaranteed repayment of 50 percent of the loan until project completion, when the repayment guaranty is reduced to 25 percent.  The Company’s repayment guaranty is further reduced to 10 percent upon achieving a debt service coverage ratio of 1.25, as defined.  Additionally, the Company has guaranteed payment of all interest due under the loan.
The Company performed development, management, and other services for Portside Apartment Holdings and recognized $149,000 and $360,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
PruRose Port Imperial South 13, LLC
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 20 percent residual interest in a to-be-built, 280-unit multi-family rental property (“Port Imperial 13”) located in Weehawken, New Jersey.  Port Imperial 13 began construction in January 2013 with anticipated initial deliveries in the fourth quarter 2014.
The remaining interest in the PruRose Port Imperial South 13, LLC (“PruRose 13”) is owned by PR II Port Imperial South 13 Investor LLC (“Prudential 13”).  Pursuant to the operating agreement, Prudential 13 is required to fund $23.1 million of the estimated total development costs of $96.4 million, not including contributed land capital of $21 million, which is allocated $19.2 million to Prudential 13 and $1.8 million to the Company, with the balance to be funded by a $73.4 million construction loan.
In general, the operating agreement of PruRose 13 provides that operating cash flows are distributed to members first to Prudential 13 and then to the Company based on a nine percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential 13 had a capital balance of $40.5 million and an accumulated unpaid operating return of $2.7 million and the Company had a capital balance of $1.8 million and an accumulated unpaid operating return of $0.1 million.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
Subject to an agreement, 20 percent of distributions received by the Company, in excess of an eight percent IRR, shall be paid to another party.
PruRose 13 has a construction loan in an amount not to exceed $73.4 million with no balance at September 30, 2013.  The loan bears interest at a rate of LIBOR plus 215 basis points and matures in June 2016.  The loan provides, subject to certain conditions, a one-year extension option followed by a six-month extension option with a fee of 25 basis points each.  The Company has guaranteed lien-free completion of the project to the lender and Prudential.  The Company has also guaranteed repayment of up to $11 million of the loan.   The Company’s guaranty of repayment is reduced to $7.4 million upon achieving a debt service coverage ratio of 1.25, and to zero upon achieving a debt service coverage ratio of 1.40, as defined.  Additionally, the Company has guaranteed payment of all interest due under the loan.  On December 28, 2012, the interest rate on an amount not expected to exceed 95 percent of the outstanding loan balance was fixed at 2.79 percent from July 1, 2013 to January 1, 2016.
The Company performed development, management, and other services for PruRose 13 and recognized $212,000 and $537,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
Roseland/Port Imperial Partners, L.P.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 20 percent residual interest in a to-be-built, 363-unit multi-family rental property (the “Parcel C Project”), undeveloped land parcels, parcels 6, I and J (“Port Imperial North Land”), and a parcel of land with a ground lease to a retail tenant all located in West New York, New Jersey.
The remaining interests in the development project-owning entity, Roseland/Port Imperial Partners, L.P. (“Roseland/PI”) are owned 79 percent by Prudential and one percent by Prudential-Port Imperial LLC (“Prudential LLC”).
The operating agreement of Roseland/PI provides, among other things, for the distribution of net cash flow to the members, as follows:
·	to Prudential and Prudential LLC, in proportion to the excess of their operating return of ten percent on Prudential’s Parcel C contribution, as defined, accrued to the date of such distribution over the aggregate amounts previously distributed to such partner for such return;
·	to the partners, to the extent of any excess of such partner’s operating return of ten percent on its additional capital contributions over the aggregate amounts previously distributed for such return; and
·	to the partners in accordance with their percentage interests.
As of September 30, 2013, Prudential and Prudential LLC had a Parcel C capital balance of $18.2 million and an accumulated unpaid operating return of $3.8 million and the Company had a capital balance of $26,000.  Construction of the Parcel C Project is expected to start in 2015.
In addition, the operating agreement provides each member a land capital account associated with the Port Imperial North Land.  As of September 30, 2013, Prudential and Prudential LLC had a land capital account balance of $57.7 million and the Company had a land capital account of $5.0 million. The land capital account balances do not earn a return and will be contributed to a development entity upon construction start for each development parcel, as defined.  Also, as of September 30, 2013, Prudential and Prudential LLC had a capital balance of $584,000 and an accumulated unpaid operating return of $23,000 and the Company had a capital balance of $146,000 and an accumulated unpaid operating return of $6,000 related to the Port Imperial North land.
RoseGarden Marbella South, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 24.27 percent indirect residual interest in a to-be-built, 311-unit high-rise multi-family rental property (the “Marbella II Project”) which is located in Jersey City, New Jersey.  The Marbella II Project began construction in the third quarter 2013.
The Company owns 48.5325 percent of RoseGarden Marbella South, L.L.C. (“RoseGarden South”) with the remaining interest owned by MG Marbella Partners II, L.L.C.
RoseGarden South holds a 50 percent interest in the development project-owning entity, PruRose Marbella II, L.L.C. (“PruRose/Marbella II”), with the remaining interest owned by PRISA III Investments LLC (“Prudential-Marbella II”).  Total estimated development costs of $132.1 million are anticipated to be funded with $54.7 million of member capital, $41.4 million from Prudential-Marbella II and $13.3 million from the Company, with the balance to be funded by a $77.4 million construction loan.
In general, the operating agreement of PruRose/Marbella II provides that operating cash flows are distributed to members pro-rata based on a nine percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Prudential-Marbella II had a capital balance of $3.4 million and an accumulated unpaid operating return of $0.3 million and RoseGarden South had a capital balance of $1.7 million with an unpaid operating return of $39,000.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return and then to repay each members’ capital balance in the same priority as operating cash flows, with any excess distributed to the members in accordance with their ownership percentages.
Net cash flow for RoseGarden South is distributed to the members in accordance with their ownership percentages.
On October 1, 2013, PruRose/Marbella II closed on a construction loan in an amount not to exceed $77.4 million.  The loan bears interest at a rate of LIBOR plus 225 basis points and matures April 1, 2017 and provides subject to certain conditions, two one year extension options with a fee of 25 basis points for each year.  The Company has guaranteed lien-free completion of the project to the lender and Prudential-Marbella II.  Additionally, the Company has guaranteed payments of all interest, operating deficits and deferred equity due under the loan.
The Company performed development, management and other services for PruRose Marbella II and recognized $195,000 and $213,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
PruRose Riverwalk G, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 25 percent indirect residual interest in a to-be-built, 12-story, 316-unit multi-family rental property (the “RiverTrace Project”).  The RiverTrace Project is located in West New York, New Jersey. The RiverTrace Project began construction in November 2011 with anticipated initial deliveries in the fourth quarter 2013.
The Company owns 50 percent of PruRose Riverwalk G, L.L.C. (“PruRose Riverwalk”) with the remaining interest owned by Prudential.
PruRose Riverwalk owns a 50 percent interest in the project-owning entity, Riverwalk G Urban Renewal, L.L.C. (“Riverwalk G”), with the remaining interest owned by West New York Parcel G Apartments Investors, LLC (“Investor”).  Pursuant to the operating agreement, Investor is required to fund $35 million of the estimated total development costs of $118.1 million, with the balance to be funded by an $83.1 million construction loan.
In general, the operating agreement of Riverwalk G provides that operating cash flows are distributed to members first to Investor and then to PruRose Riverwalk based on a 7.75 percent operating return on each members’ capital balance in priorities as detailed in the operating agreement.  Excess operating cash flows are distributed to the members in accordance with their ownership percentages.  As of September 30, 2013, Investor had a capital balance of $35 million and an unpaid operating return of $6.0 million.  It is not anticipated that PruRose Riverwalk will be required to fund any capital.
Net cash flows from a capital event are distributed first to the extent of any accumulated unpaid operating return, then to repay each members’ capital balance in the same priority as operating cash flows, and then 100 percent to Investor until Investor receives a 7.75 percent IRR, as defined, with any excess distributed to the members in accordance with their ownership percentages.
The operating agreement of PruRose Riverwalk provides, among other things, for the distribution of net cash flow to the members in accordance with their ownership percentages.  In addition, the operating agreement requires that the initial $1.3 million in distributions to the Company be redirected to Prudential.
Riverwalk G has a construction loan in an amount not to exceed $83.1 million, with a balance of $54.6 million as of September 30, 2013, which bears interest at six percent and matures in July 2021.  The interest-only loan is collateralized by the RiverTrace Project.  The Company has guaranteed a lien-free completion of the project to the lender and Investor.  The Company guarantees $15.0 million of the loan principal until six months after completion of the project.
The Company performed development, management, and other services for Riverwalk G and recognized  $30,000 and $379,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
ELMAJO Urban Renewal Associates, LLC/Estuary Urban Renewal Unit B, LLC
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 7.5 percent residual interest in a to-be-built, three-building, 582 multi-family rental property located in Weehawken, New Jersey (the “Lincoln Harbor Project”), with the remaining interest owned by ELMAJO Management, Inc. (“EMI”).  The first phase, Building A, with 181 units, and Building C, with 174 units, began construction in 2012 and the second phase, Building B, with 227 units, began construction in January 2013 with anticipated initial deliveries in the first quarter 2014.  On March 13, 2013, Estuary Urban Renewal Unit B, LLC (“Estuary UR”) was formed to own and develop the second phase, Building B.  Estimated total development costs for the Lincoln Harbor Project is $218.3 million. EMI is required to fund any capital requirements in excess of construction financing.  The Company has no funding requirements to the venture.
The operating agreements of ELMAJO Urban Renewal Associates, LLC (“ELMAJO UR”), the entity which owns the Lincoln Harbor Project, Building A and C, and Estuary UR, the entity that owns the Lincoln Harbor Project Building B, provides, among other things, for the distribution of net distributable cash to the members, as follows:
·	First, to the members to the extent of and in proportion to their respective preferred return of 8.50 percent on the member’s unrecovered capital; and
·	Second, to the members in accordance with their ownership percentages.
As of September 30, 2013, EMI and Estuary UR have a combined capital balance of $73.9 million and an unpaid preferred return of $13.5 million.
ELMAJO UR has a construction loan for Building A and Building C in an amount not to exceed $95 million, with a balance of $40.2 million as of September 30, 2013, which bears interest at LIBOR plus 210 basis points and matures in June 2016.  The loan provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.
Estuary UR has a construction loan for Building B in an amount not to exceed $57 million, with a balance of $4.1 million as of September 30, 2013, which bears interest at LIBOR plus 210 basis points and matures in January 2017.  The loan provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.
The Company performed development and other services for ELMAJO UR and Estuary UR and recognized $255,000 and $735,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
RiverPark at Harrison I, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 36 percent interest in a multi-phase project located in Harrison, New Jersey (the “RiverPark Project”).  Construction of a 141-unit multi-family rental property of the RiverPark Project is projected to start in the near term.  Estimated total development costs of $28.2 million are expected to be funded with a $23.4 million construction loan, with the balance to be funded with member capital.  The Company is required to fund 40.5 percent of capital.
The remaining interests in the development project-owning entity, RiverPark at Harrison I Urban Renewal, L.L.C. (“RiverPark”) are owned 36 percent by Chall Enterprises, L.L.C. and 28 percent by an investor group.
In general, the operating agreement of RiverPark provides, among other things, for the distribution of net cash flow to the members in accordance with their ownership percentages.
On June 27, 2013, RiverPark obtained a construction loan in an amount not to exceed $23.4 million with a balance of $0.9 million as of September 30, 2013. The loan, which bears interest at LIBOR plus 235 basis points, matures in June 2016 and provides, subject to certain conditions, two one-year extension options with a fee of 20 basis points for each year.  The Company has guaranteed lien-free completion of the project to the lender and repayment of 25 percent of the principal amount at maturity.  The Company’s repayment guaranty is reduced to 10 percent upon project completion, achieving a debt service coverage ratio of 1.30 and satisfaction of the loan-to-value ratio of 65 percent, as defined.  Additionally, the Company has guaranteed payment of all interest due under the loan.
150 Main Street, L.L.C.
On October 23, 2012, as part of the Roseland transaction, the Company had acquired a 26.25 percent interest in a to-be-built, 108-unit multi-family rental property located in Eastchester, New York (the “Eastchester Project”) for approximately $4.9 million.  The remaining interests in the development project-owning entity, 150 Main Street, L.L.C. (“Eastchester”) was owned 26.25 percent by JMP Eastchester, L.L.C. and 47.5 percent by Hudson Valley Land Holdings, L.L.C. (“HVLH”).  The Eastchester Project is expected to start in the near term.  Estimated total development costs of $46 million are expected to be funded with a $27.5 million construction loan and the balance of $18.5 million to be funded with member capital.
The operating agreement of Eastchester provides, among other things, for the distribution of net operating cash flow to the members, as follows:
·	to HVLH to the extent of its accrued but unpaid preferred return of eight percent on the unrecovered allocated land value, as defined;
·	to the members, pro rata, to the extent of their respective accrued but unpaid return of eight percent on their unrecovered capital percentages; and
·	to the members in accordance with their ownership percentages.
Net cash flows from a capital event are distributed to the members, first, in respect of unrecovered return and then unrecovered capital on a pro rata basis, with any excess in accordance with their ownership percentages.
On August 22, 2013, the operating agreement of Eastchester was modified which increased the Company’s effective ownership to 76.25 percent, with the remaining 23.75 percent owned by HVLH.  The agreement also provided the Company with control of all major decisions.  Accordingly, effective from this date, the Company is consolidating Eastchester under the provisions of ASC 810, Consolidation.  As the carrying value approximated the fair value of the net assets acquired, there was no holding period gain or loss recognized on this transaction.
The Company performed development and other services for Eastchester and recognized $87,000 and $102,000 in income for such services in the three and nine months ended September 30, 2013, respectively.
RoseGarden Monaco, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 41.67 percent interest in the rights to acquire a land parcel (“San  Remo Land”) located in Jersey City, New Jersey, pursuant to an agreement which expires in 2017.
The remaining interest in the rights-owning entity, RoseGarden Monaco, L.L.C. is owned by MG Monaco Partners, L.L.C.  The operating agreement requires capital contributions and distributions in accordance with their ownership percentages.
Hillsborough 206 Holdings, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 50 percent interest in a site zoned for retail uses (excluding supermarkets) which is located in Hillsborough, New Jersey.
The remaining interest in the property-owning entity, Hillsborough 206 Holdings, L.L.C. (“Hillsborough 206”) is owned by BNE Investors VIII, L.L.C.
The operating agreement of Hillsborough 206 provides, among other things, for the distribution of distributable cash to the members, in accordance with their ownership percentages.
Grand Jersey Waterfront Urban Renewal Associates, L.L.C.
On October 23, 2012, as part of the Roseland Transaction, the Company acquired a 50 percent interest in an entity designated as redeveloper of a land parcel (“Liberty Landings”) located in Jersey City, New Jersey.  The remaining interest in the entity, Grand Jersey Waterfront Urban Renewal Associates, L.L.C., is owned by Waterfront Realty Company, L.L.C.
Capital requirements are funded in accordance with ownership percentages.
Crystal House Apartments Investors LLC
On March 20, 2013, the Company entered into a joint venture with a fund advised by UBS Global Asset Management (“UBS”) to form Crystal House Apartments Investors LLC (“CHAI”) which acquired the 828-unit multi-family property known as Crystal House located in Arlington, Virginia (“Crystal House Property”) for approximately $262.5 million.  The acquisition included vacant land to accommodate the development of approximately 295 additional units of which 252 are currently approved. The Company holds a 25 percent interest in the Crystal House property and a 50 percent interest in the vacant land.
In general, the operating agreement of CHAI provides that net operating cash flows are distributed to the members in accordance with ownership percentages.  Net cash flows from a capital event are distributed first to the members in accordance with ownership percentages until they receive a nine percent IRR, as defined, with any excess distributed 50 percent to the Company and 50 percent to UBS.
CHAI obtained a mortgage loan on the acquired property, which has a balance of $165 million as of September 30, 2013, bears interest at 3.17 percent and matures in March 2020.  The loan, which is interest-only during the initial 5-year term and amortizable over a 30-year period for the remaining term, is collateralized by the Crystal House Property.
The Company performed management, leasing and other services for CHAI and recognized $109,000 and $228,000 in income for such services in the three and nine months ended September 30, 2013.
Other
The Company acquires other ownership interests in various ventures from time to time, including residual interests in assets previously owned and interests in ventures whose business is related to its core operations.  These ventures are not expected to significantly impact the Company’s operations in the near term.

Deferred_Charges_Goodwill_And_

Deferred Charges, Goodwill And Other Assets	9 Months Ended
	Sep. 30, 2013
Deferred Charges, Goodwill And Other Assets [Abstract]
Deferred Charges, Goodwill And Other Assets	5.    DEFERRED CHARGES, GOODWILL AND OTHER ASSETS
			September 30,		December 31,
	(dollars in thousands)		2013		2012
	Deferred leasing costs	$	253,654	$	267,197
	Deferred financing costs		25,396		20,447
			279,050		287,644
	Accumulated amortization		-124,437		-131,613
	Deferred charges, net		154,613		156,031
	Notes receivable		22,047		-
	In-place lease values, related intangible and other assets, net		13,501		19,284
	Goodwill		2,945		2,945
	Prepaid expenses and other assets, net		91,293		26,614
	Total deferred charges, goodwill and other assets	$	284,399	$	204,874

Restricted_Cash

Restricted Cash	9 Months Ended
	Sep. 30, 2013
Restricted Cash [Abstract]
Restricted Cash	6.    RESTRICTED CASH
	Restricted cash includes tenant security deposits for certain of the Company’s properties, and escrow and reserve funds for debt service, real estate taxes, property insurance, capital improvements, tenant improvements, and leasing costs established pursuant to certain mortgage financing arrangements, and is comprised of the following:  (dollars in thousands)
			September 30,		December 31,
			2013		2012
	Security deposits	$	7,780	$	7,165
	Escrow and other reserve funds		11,433		12,174
	Total restricted cash	$	19,213	$	19,339

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2013
Discontinued Operations [Abstract]
Discontinued Operations	7.    DISCONTINUED OPERATIONS
	The Company sold 24 office properties aggregating 3 million square feet and three developable land parcels for total net sales proceeds of approximately $390.6 million during the nine months ended September 30, 2013 and has presented them as discontinued operations in its statement of operations for all periods presented.   (See Note 3: Real Estate Transactions – Property Sales).
	As the Company disposed of 2200 Renaissance Boulevard in King of Prussia, Pennsylvania; 95 Chestnut Ridge Road in Montvale, New Jersey; and three office buildings in Moorestown, New Jersey during the year ended December 31, 2012, the Company has presented the results from these assets as discontinued operations in its statements of operations for all periods presented.
	The following table summarizes income from discontinued operations and the related realized gains (losses) and unrealized losses on disposition of rental property and impairments, net, for the three and nine month periods ended September 30, 2013 and 2012:  (dollars in thousands)
		Three Months Ended				Nine  Months Ended
		September 30,				September 30,
			2013		2012		2013		2012
	Total revenues	$	6,405	$	17,376	$	33,610	$	51,790
	Operating and other expenses		-2,472		-6,606		-13,454		-20,308
	Depreciation and amortization		-1,769		-4,351		-8,196		-13,363
	Interest expense (net of interest income)		-		-82		-118		-673
	Income from discontinued operations		2,164		6,337		11,842		17,446
	Loss from early extinguishment of debt		-		-		-703		-
	Impairments		-		-		-23,851		-
	Unrealized losses on disposition of rental property		-		-		-		-2,134
	Realized gains on disposition of rental property		47,321		12		84,930		4,524
	Realized gains (losses) and unrealized losses on
	disposition of rental property and impairments, net		47,321		12		61,079		2,390
	Total discontinued operations, net	$	49,485	$	6,349	$	72,218	$	19,836

Senior_Unsecured_Notes

Senior Unsecured Notes	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Senior Unsecured Notes	8.    SENIOR UNSECURED NOTES
	On May 8, 2013, the Company completed the sale of $275 million face amount of 3.15 percent senior unsecured notes due May 15, 2023 with interest payable semi-annually in arrears.  The net proceeds from the issuance of approximately $266.5 million, after underwriting discount and offering expenses, were used primarily to repay outstanding borrowings under the Company’s unsecured revolving credit facility.
	A summary of the Company’s senior unsecured notes as of September 30, 2013 and December 31, 2012 is as follows:  (dollars in thousands)
			September 30,		December 31,	Effective
			2013		2012	Rate (1)
	4.600% Senior Unsecured Notes, due June 15, 2013 (2)		-	$	99,987	4.742	%
	5.125% Senior Unsecured Notes, due February 15, 2014	$	200,090		200,270	5.110	%
	5.125% Senior Unsecured Notes, due January 15, 2015		149,879		149,810	5.297	%
	5.800% Senior Unsecured Notes, due January 15, 2016		200,180		200,237	5.806	%
	2.500% Senior Unsecured Notes, due  December 15, 2017		248,781		248,560	2.803	%
	7.750% Senior Unsecured Notes, due August 15, 2019		248,746		248,585	8.017	%
	4.500% Senior Unsecured Notes, due April 18, 2022		299,490		299,445	4.612	%
	3.150% Senior Unsecured Notes, due May 15, 2023		269,171		-	3.517	%
	Total senior unsecured notes	$	1,616,337	$	1,446,894
	(1)Includes the cost of terminated treasury lock agreements (if any), offering and other transaction costs and the discount/premium on the notes, as applicable.
	(2)These notes were paid at maturity using available cash.
	The terms of the Company’s senior unsecured notes include certain restrictions and covenants which require compliance with financial ratios relating to the maximum amount of debt leverage, the maximum amount of secured indebtedness, the minimum amount of debt service coverage and the maximum amount of unsecured debt as a percent of unsecured assets.

Unsecured_Revolving_Credit_Fac

Unsecured Revolving Credit Facility	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Unsecured Revolving Credit Facility	9.    UNSECURED REVOLVING CREDIT FACILITY
	On July 16, 2013, the Company amended and restated its unsecured revolving credit facility with a group of 17 lenders.  The $600 million facility is expandable to $1 billion and matures in July 2017.  It has two six month extension options each requiring the payment of a 7.5 basis point fee.  The interest rate on outstanding borrowings (not electing the Company’s competitive bid feature) and the facility fee on the current borrowing capacity payable quarterly in arrears are based upon the Operating Partnership’s unsecured debt ratings, as follows:
	Operating Partnership's	Interest Rate -
	Unsecured Debt Ratings:	Applicable Basis Points	Facility Fee
	Higher of S&P or Moody's	Above LIBOR	Basis Points
	No ratings or less than BBB-/Baa3	170.0	35.0
	BBB- or Baa3	130.0	30.0
	BBB or Baa2(current)	110.0	20.0
	BBB+ or Baa1	100.0	15.0
	A- or A3 or higher	92.5	12.5
	The facility has a competitive bid feature, which allows the Company to solicit bids from lenders under the facility to borrow up to $300 million at interest rates less than those above.
	The terms of the unsecured facility include certain restrictions and covenants which limit, among other things the incurrence of additional indebtedness, the incurrence of liens and the disposition of real estate properties (to the extent that: (i) such property dispositions cause the Company to default on any of the financial ratios of the facility described below, or (ii) the property dispositions are completed while the Company is under an event of default under the facility, unless, under certain circumstances, such disposition is being carried out to cure such default), and which require compliance with financial ratios relating to the maximum leverage ratio, the maximum amount of secured indebtedness, the minimum amount of fixed charge coverage, the maximum amount of unsecured indebtedness, the minimum amount of unencumbered property interest coverage and certain investment limitations.    If an event of default has occurred and is continuing, the Company will not make any excess distributions except to enable the Company to continue to qualify as a REIT under the Code.
	The lending group for the credit facility consists of: JPMorgan Chase Bank, N.A., as administrative agent; Bank of America, N.A.,  as syndication agent; Deutsche Bank AG New York Branch; U.S. Bank National Association and Wells Fargo Bank, N.A., as documentation agents; Capital One, National Association; Citibank  N.A.; Comerica Bank; PNC Bank, National Association; SunTrust Bank; The Bank of Tokyo-Mitsubishi UFJ, LTD.; The Bank of New York Mellon; as managing agents; and Compass Bank; Branch Banking and Trust Company; TD Bank, N.A.; Citizens Bank of Pennsylvania; Mega International Commercial Bank Co., LTD.  New York Branch, as participants.
	As of September 30, 2013 and December 31, 2012, the Company had no outstanding borrowings under its unsecured revolving credit facility.
	Through July 15, 2013, the Company had a $600 million unsecured revolving credit facility, which had an interest rate on outstanding borrowings of LIBOR plus 125 basis points and a facility fee of 25 basis points.
	MONEY MARKET LOAN
	The Company has an agreement with JPMorgan Chase Bank to participate in a noncommitted money market loan program (“Money Market Loan”).  The Money Market Loan is an unsecured borrowing of up to $75 million arranged by JPMorgan Chase Bank with maturities of 30 days or less.  The rate of interest on the Money Market Loan borrowing is set at the time of each borrowing.  As of September 30, 2013 and December 31, 2012, the Company had no outstanding borrowings under the Money Market Loan.

Mortgages_Loans_Payable_And_Ot

Mortgages, Loans Payable And Other Obligations	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Mortgages, Loans Payable And Other Obligations	10.   MORTGAGES, LOANS PAYABLE AND OTHER OBLIGATIONS
	The Company has mortgages, loans payable and other obligations which primarily consist of various loans collateralized by certain of the Company’s rental properties.  As of September 30, 2013,  30 of the Company’s properties, with a total book value of approximately $989 million, are encumbered by the Company’s mortgages and loans payable.  Payments on mortgages, loans payable and other obligations are generally due in monthly installments of principal and interest, or interest only.
	A summary of the Company’s mortgages, loans payable and other obligations as of September 30, 2013 and December 31, 2012 is as follows: (dollars in thousands)
				Effective			September 30,		December 31,
	Property Name	Lender		Rate (a)			2013		2012	Maturity
	51 Imclone (b)	Wells Fargo CMBS		8.390	%		-	$	3,878	-
	9200 Edmonston Road (c)	Principal Commercial Funding L.L.C.		5.534	%	$	4,158		4,305	5/1/13
	6305 Ivy Lane (d)	RGA Reinsurance Company		5.525	%		5,811		5,984	10/1/13
	Port Imperial South 4/5	Wells Fargo Bank N.A.	LIBOR+3.50		%		36,355		34,889	12/31/13
	395 West Passaic	State Farm Life Insurance Co.		6.004	%		9,858		10,231	5/1/14
	6301 Ivy Lane	RGA Reinsurance Company		5.520	%		5,514		5,667	7/1/14
	35 Waterview Boulevard	Wells Fargo CMBS		6.348	%		18,502		18,746	8/11/14
	6 Becker, 85 Livingston,	Wells Fargo CMBS		10.220	%		63,945		63,126	8/11/14
	75 Livingston &
	20 Waterview (e)
	4 Sylvan	Wells Fargo CMBS		10.190	%		14,524		14,485	8/11/14
	10 Independence	Wells Fargo CMBS		12.440	%		16,536		16,251	8/11/14
	Port Imperial South	Wells Fargo Bank N.A.	LIBOR+1.75		%		43,045		42,168	9/19/15
	4 Becker	Wells Fargo CMBS		9.550	%		38,681		38,274	5/11/16
	5 Becker (f)	Wells Fargo CMBS		12.830	%		12,912		12,507	5/11/16
	210 Clay	Wells Fargo CMBS		13.420	%		12,638		12,275	5/11/16
	Various (g)	Prudential Insurance		6.332	%		147,939		149,281	1/15/17
	23 Main Street	JPMorgan CMBS		5.587	%		29,997		30,395	9/1/18
	Harborside Plaza 5	The Northwestern Mutual Life		6.842	%		225,996		228,481	11/1/18
		Insurance Co. & New York Life
		Insurance Co.
	233 Canoe Brook Road	The Provident Bank		4.375	%		3,895		3,945	2/1/19
	100 Walnut Avenue	Guardian Life Insurance Co.		7.311	%		18,852		19,025	2/1/19
	One River Center (h)	Guardian Life Insurance Co.		7.311	%		43,186		43,582	2/1/19
	Total mortgages, loans payable and other obligations					$	752,344	$	757,495
	(a)	Reflects effective rate of debt, including deferred financing costs, comprised of the cost of terminated treasury lock agreements (if any), debt initiation costs, mark-to-market adjustment of acquired debt and other transaction costs, as applicable.
	(b)	With the sale of the property on May 31, 2013, the mortgage was satisfied by the Company.  The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations:  loss from early extinguishment of debt for the nine months ended September 30, 2013.
	(c)	The lease with the tenant occupying 100 percent of the building expired on May 1, 2013 and the tenant continues to occupy the building on a month-to-month basis.  The mortgage loan matured on May 1, 2013 and was not repaid.  The Company received a notice of default from the lender on July 17, 2013.  The Company has requested a modification of the loan terms and is also in discussions regarding a deed-in-lieu of foreclosure with the lender.
	(d)	On October 1, 2013, the Company repaid the mortgage loan at par, using available cash.  The original maturity date was January 1, 2014.
	(e)	Mortgage is cross collateralized by the four properties.
	(f)	The cash flow from this property is insufficient to cover operating costs and debt service.  Consequently, the Company notified the lender and suspended debt service payments in August 2013.  The Company has begun discussions with the lender regarding a modification of loan terms.  The Company recorded an impairment charge on this asset along with eight other office properties as of September 30, 2013.  See Note 3: Real Estate Transactions – Impairments.
	(g)	Mortgage is collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.
	(h)	Mortgage is collateralized by the three properties comprising One River Center.
	CASH PAID FOR INTEREST AND INTEREST CAPITALIZED
	Cash paid for interest for the nine months ended September 30, 2013 and 2012 was $97,284,000 and $98,191,000, respectively.  Interest capitalized by the Company for the nine months ended September 30, 2013 and 2012 was $10,262,000 and $1,427,000, respectively.
	SUMMARY OF INDEBTEDNESS
	As of September 30, 2013, the Company’s total indebtedness of $2,368,681,000 (weighted average interest rate of 5.62 percent) was comprised of $79,400,000 of variable rate mortgage debt (weighted average rate of 2.74 percent) and fixed rate debt and other obligations of $2,289,281,000 (weighted average rate of 5.72 percent).
	As of December 31, 2012, the Company’s total indebtedness of $2,204,389,000 (weighted average interest rate of 5.86 percent) was comprised of $77,057,000 of variable rate mortgage debt (weighted average rate of 3.32 percent) and fixed rate debt and other obligations of $2,127,332,000 (weighted average rate of 5.95 percent).

Employee_Benefit_401k_Plans_An

Employee Benefit 401(k) Plans And Deferred Retirement Compensation Agreements	9 Months Ended
	Sep. 30, 2013
Employee Benefit 401(k) Plans And Deferred Retirement Compensation Agreements [Abstract]
Employee Benefit 401(k) Plans And Deferred Retirement Compensation Agreements	11.   EMPLOYEE BENEFIT 401(k) PLANS AND DEFERRED RETIREMENT
	COMPENSATION AGREEMENTS
	Employees of the Company, who meet certain minimum age and service requirements, are eligible to participate in the Mack-Cali Realty Corporation 401(k) Savings/Retirement Plan (the “401(k) Plan”).  Eligible employees may elect to defer from one percent up to 60 percent of their annual compensation on a pre-tax basis to the 401(k) Plan, subject to certain limitations imposed by federal law.  The amounts contributed by employees are immediately vested and non-forfeitable.  The Company may make discretionary matching or profit sharing contributions to the 401(k) Plan on behalf of eligible participants in any plan year.  Participants are always 100 percent vested in their pre-tax contributions and will begin vesting in any matching or profit sharing contributions made on their behalf after two years of service with the Company at a rate of 20 percent per year, becoming 100 percent vested after a total of six years of service with the Company.  All contributions are allocated as a percentage of compensation of the eligible participants for the Plan year.  The assets of the 401(k) Plan are held in trust and a separate account is established for each participant.  A participant may receive a distribution of his or her vested account balance in the 401(k) Plan in a single sum or in installment payments upon his or her termination of service with the Company.  The 401(k) Plan was recently amended to provide for employees of the Roseland business to receive matching contributions.  Total expense recognized by the Company for the 401(k) Plan for the three months ended September 30, 2013 and 2012 was $24,000 and zero, respectively, and $91,000 and zero for the nine months ended September 30, 2013 and 2012, respectively.
	On September 12, 2012, the Board of Directors of the Company approved multi-year deferred retirement compensation agreements for those executive officers in place on such date (the “Deferred Retirement Compensation Agreements”).  Pursuant to the Deferred Retirement Compensation Agreements, the Company will make annual contributions of stock units (“Stock Units”) representing shares of the Company’s common stock on January 1 of each year from 2013 through 2017 into a deferred compensation account maintained on behalf of each Messrs. Hersh, Lefkowitz and Thomas.  The annual contribution for Messrs. Hersh, Lefkowitz and Thomas shall be in an amount of Stock Units equal to $500,000, $160,000 and $100,000, respectively.  The Company granted 25,333 Stock Units in the nine months ended September 30, 2013.  Vesting of each annual contribution of Stock Units will occur on December 31 of each year, subject to continued employment. Upon the payment of dividends on the Company’s common stock, Messrs. Hersh, Lefkowitz and Thomas shall be entitled to dividend equivalent payments in respect of both vested and unvested Stock Units payable in the form of additional Stock Units.  The Stock Units shall become payable within 30 days after the earliest of any of the following triggering events: (a) the executive’s death or disability; (b) the date of the executive’s separation from service to the Company; and (c) the effective date of a change in control, in each case as such terms are defined in the employment agreements of Messrs. Hersh, Lefkowitz and Thomas.  Upon the occurrence of a triggering event, the Stock Units shall be paid in cash based on the closing price of the Company’s common stock on the date of such triggering event.

Disclosure_Of_Fair_Value_Of_Fi

Disclosure Of Fair Value Of Financial Instruments	9 Months Ended
	Sep. 30, 2013
Disclosure Of Fair Value Of Financial Instruments [Abstract]
Disclosure Of Fair Value Of Financial Instruments	12.   DISCLOSURE OF FAIR VALUE OF FINANCIAL INSTRUMENTS
	The following disclosure of estimated fair value was determined by management using available market information and appropriate valuation methodologies.  However, considerable judgment is necessary to interpret market data and develop estimated fair value.  Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize on disposition of the financial instruments at September 30, 2013 and December 31, 2012.  The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.
	Cash equivalents, receivables, accounts payable, and accrued expenses and other liabilities are carried at amounts which reasonably approximate their fair values as of September 30, 2013 and December 31, 2012.
	The fair value of the Company’s long-term debt, consisting of senior unsecured notes, an unsecured revolving credit facility and mortgages, loans payable and other obligations aggregated approximately $2.5 billion and $2.4 billion as compared to the book value of approximately $2.4 billion and $2.2 billion as of September 30, 2013 and December 31, 2012, respectively.  The fair value of the Company’s long-term debt is categorized as a level 3 basis (as provided by ASC 820, Fair Value Measurements and Disclosures).  The fair value is estimated using a discounted cash flow analysis valuation based on the borrowing rates currently available to the Company for loans with similar terms and maturities.  The fair value of the mortgage debt and the unsecured notes was determined by discounting the future contractual interest and principal payments by a market rate.
	Disclosure about fair value of financial instruments is based on pertinent information available to management as of September 30, 2013 and December 31, 2012.  Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since September 30, 2013 and current estimates of fair value may differ significantly from the amounts presented herein.

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies [Abstract]
Commitments And Contingencies	13.   COMMITMENTS AND CONTINGENCIES
	TAX ABATEMENT AGREEMENTS
	Pursuant to agreements with certain municipalities, the Company is required to make payments in lieu of property taxes (“PILOT”) on certain of its properties located in Jersey City and has a tax abatement agreement with Weehawken, New Jersey, as follows:
	The Harborside Plaza 4-A agreement with the City of Jersey City, as amended, which commenced in 2002, is for a term of 20 years.  The PILOT is equal to two percent of Total Project Costs, as defined.  Total Project Costs are $49.5 million.  The PILOT totaled $247,000 and $247,000 for the three months ended September 30, 2013 and 2012, respectively, and $742,000 and $742,000 for the nine months ended September 30, 2013 and 2012, respectively.
	The Harborside Plaza 5 agreement, also with the City of Jersey City, as amended, which commenced in 2002, is for a term of 20 years.  The PILOT is equal to two percent of Total Project Costs, as defined.  Total Project Costs are $170.9 million.  The PILOT totaled $854,000 and $854,000 for the three months ended September 30, 2013 and 2012, respectively, and $2.6 million and $2.6 million for the nine months ended September 30, 2013 and 2012, respectively.
	The Company also has an agreement with the City of Weehawken for its Port Imperial 4/5 garage development project (acquired in the Roseland Transaction).  The agreement was executed in March 2011 and has a term of five years beginning when the first certificate of occupancy is issued for any portion of the project, which was issued in the third quarter 2013.  The agreement provides that real estate taxes be paid initially on the land value of the project only and allows for a phase in of real estate taxes on the value of the improvements over a five year period.
	At the conclusion of the above-referenced PILOT agreements, it is expected that the properties will be assessed by the municipality and be subject to real estate taxes at the then prevailing rates.
	LITIGATION
	The Company is a defendant in litigation arising in the normal course of its business activities.  Management does not believe that the ultimate resolution of these matters will have a materially adverse effect upon the Company’s financial condition taken as whole.
	GROUND LEASE AGREEMENTS
	Future minimum rental payments under the terms of all non-cancelable ground leases under which the Company is the lessee, as of September 30, 2013, are as follows: (dollars in thousands)
	Year		Amount
	October 1 through December 31, 2013	$	88
	2014		367
	2015		371
	2016		371
	2017		267
	2018 through 2084		16,051
	Total	$	17,515
	Ground lease expense incurred by the Company during the three months ended September 30, 2013 and 2012 amounted to $102,000 and $102,000, respectively, and $305,000 and $305,000 for the nine months ended September 30, 2013 and 2012, respectively.
	ROSELAND CONTINGENT CONSIDERATION
	On October 23, 2012, the Company acquired the real estate development and management businesses (the “Roseland Business”) of Roseland Partners, L.L.C. (“Roseland Partners”), a premier multi-family rental community developer and manager based in Short Hills, New Jersey, and the Roseland Partners’ interests (the “Roseland Transaction”), principally through unconsolidated joint venture interests in various entities which, directly or indirectly, own or have rights with respect to various residential and/or commercial properties or vacant land (collectively, the “Roseland Assets”).
	The purchase price for the Roseland Transaction included the fair value of contingent consideration pursuant to an earn-out (“Earn Out”) agreement of approximately $10 million.  The Earn Out largely represents contingent consideration and requires the Company to pay Roseland Partners an aggregate maximum of $15.6 million.  The Earn Out is based on defined criteria, as follows: (i) the Roseland Assets component of up to $8.6 million for the completion of certain developments ($2.8 million), and the start of construction on others ($2.8 million), obtaining tax credits/grants on others ($3.0 million), all of which are payable over various periods of up to three years; and (ii) total return to shareholders for up to an additional $7 million, based on a total return to shareholders measured on a three year cumulative basis and on discrete years, both on an absolute basis and in comparison to a peer group.  Each of the Earn Out elements were separately valued as of the acquisition date with an aggregate fair value of contingent consideration of approximately $10 million (representing $6.3 million for the Roseland Assets and $3.7 million for the total return to shareholders component).  During the second quarter of 2013, the Company recognized a benefit of $1 million related to a decline in fair value in the Earn Out liability, which is included in Interest and other investment income for the nine months ended September 30, 2013.  Prospectively, the Earn Out liability will be remeasured at fair value quarterly until the contingency has been resolved, with any changes in fair value representing a charge or benefit directly to earnings (with no adjustment to purchase accounting).  As a result of the achievement of certain of the defined criteria, the Company paid Roseland Partners $2.8 million of the Earn Out on January 25, 2013.
	The purchase consideration for the Roseland Transaction is subject to the return of a portion of the purchase price of up to $2.0 million upon the failure to achieve a certain level of fee revenue from the Roseland Business during the 33-month period following the closing date.  Because the fee target was highly probable, no discount was ascribed to this contingently returnable consideration.  Also, at the closing, approximately $34 million in cash of the purchase price was deposited in escrow to secure certain of the indemnification obligations of Roseland Partners and its affiliates.  In April 2013, $6.7 million of the escrow was released to the Roseland Partners.
	OTHER
	The Company may not dispose of or distribute certain of its properties, currently comprised of seven properties with an aggregate net book value of approximately $124.8 million, which were originally contributed by certain unrelated common unitholders, without the express written consent of such common unitholders, as applicable, except in a manner which does not result in recognition of any built-in-gain (which may result in an income tax liability) or which reimburses the appropriate specific common unitholders for the tax consequences of the recognition of such built-in-gains (collectively, the “Property Lock-Ups”).  The aforementioned restrictions do not apply in the event that the Company sells all of its properties or in connection with a sale transaction which the Company’s Board of Directors determines is reasonably necessary to satisfy a material monetary default on any unsecured debt, judgment or liability of the Company or to cure any material monetary default on any mortgage secured by a property.  The Property Lock-Ups expire periodically through 2016.  Upon the expiration of the Property Lock-Ups, the Company is generally required to use commercially reasonable efforts to prevent any sale, transfer or other disposition of the subject properties from resulting in the recognition of built-in gain to the specific common unitholders, which include members of the Mack Group (which includes William L. Mack, Chairman of the Company’s Board of Directors; David S. Mack, director; Earle I. Mack, a former director; and Mitchell E. Hersh, president, chief executive officer and director), the Robert Martin Group (which includes Robert F. Weinberg, a former director; and Timothy M. Jones, former president), the Cali Group (which includes John R. Cali, a former director, and John J. Cali, a former director).  121 of the Company’s properties, with an aggregate net book value of approximately $1.6 billion, have lapsed restrictions and are subject to these conditions.
	In December 2011, the Company entered into a development agreement (the “Development Agreement”) with Ironstate Development LLC (“Ironstate”) for the development of residential towers with associated parking and ancillary retail space on land owned by the Company at its Harborside complex in Jersey City, New Jersey (the “Harborside Residential Project”).  The first phase of the project is expected to consist of a parking pedestal to support a high-rise tower of approximately 763 apartment units and is estimated to cost approximately $291 million, of which development costs of $9.0 million have been incurred through September 30, 2013.  The parties anticipate the first phase will be ready for occupancy by approximately the first quarter of 2016.  In October 2013, the first phase of the project was awarded $33 million in tax credits from New Jersey Economic Development Authority (NJEDA).
	Pursuant to the Development Agreement, the Company and Ironstate shall co-develop the Harborside Residential Project with Ironstate responsible for obtaining all required development permits and approvals.  Major decisions with respect to the Harborside Residential Project will require the consent of the Company and Ironstate.  The Company and Ironstate will have 85 and 15 percent interests, respectively, in the Harborside Residential Project.  The Company will receive capital credit of $30 per approved developable square foot for its land, aggregating to approximately $20.3 million at September 30, 2013.  In addition to the capital credit it will receive for its land contribution, the Company currently expects that it will fund approximately $77 million of the development costs of the project.
	The Development Agreement is subject to obtaining required approvals and development financing as well as numerous customary undertakings, covenants, obligations and conditions.  The Company has the right to reasonably determine that any phase of the Harborside Residential Project is not economically viable and may elect not to proceed, subject to certain conditions, with no further obligations to Ironstate other than reimbursement to Ironstate of all or a portion of the costs incurred by it to obtain any required approvals.
	In July 2012, the Company entered into a ground lease with Wegmans Food Markets, Inc. (“Wegmans”) at its undeveloped site located at Sylvan Way and Ridgedale Avenue in Hanover Township, New Jersey. Subject to receiving all necessary governmental approvals, Wegmans intends to construct a store of approximately 140,000 square feet on a finished pad to be delivered by the Company in the second quarter of 2014.  The Company expects to incur costs of approximately $15.7 million for the development of the site through the first quarter of 2015 (of which the Company has incurred $3.5 million through September 30, 2013).

Tenant_Leases

Tenant Leases	9 Months Ended
	Sep. 30, 2013
Tenant Leases [Abstract]
Tenant Leases	14.   TENANT LEASES
	The Properties are leased to tenants under operating leases with various expiration dates through 2033.  Substantially all of the leases provide for annual base rents plus recoveries and escalation charges based upon the tenant’s proportionate share of and/or increases in real estate taxes and certain operating costs, as defined, and the pass‑through of charges for electrical usage.
	Future minimum rentals to be received under non-cancelable operating leases at September 30, 2013 are as follows (dollars in thousands):
	Year		Amount
	October 1 through December 31, 2013	$	125,682
	2014		495,819
	2015		444,042
	2016		399,155
	2017		348,011
	2018 and thereafter		1,290,172
	Total	$	3,102,881

MackCali_Realty_Corporation_St

Mack-Cali Realty Corporation Stockholders' Equity	9 Months Ended
	Sep. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Mack-Cali Realty Corporation Stockholders' Equity	15.   MACK-CALI REALTY CORPORATION STOCKHOLDERS’ EQUITY
	To maintain its qualification as a REIT, not more than 50 percent in value of the outstanding shares of the Company may be owned, directly or indirectly, by five or fewer individuals at any time during the last half of any taxable year of the Company, other than its initial taxable year (defined to include certain entities), applying certain constructive ownership rules.  To help ensure that the Company will not fail this test, the Company’s Charter provides, among other things, certain restrictions on the transfer of common stock to prevent further concentration of stock ownership.  Moreover, to evidence compliance with these requirements, the Company must maintain records that disclose the actual ownership of its outstanding common stock and demands written statements each year from the holders of record of designated percentages of its common stock requesting the disclosure of the beneficial owners of such common stock.
	SHARE REPURCHASE PROGRAM
	In September 2012, the Board of Directors renewed and authorized an increase to the Company’s repurchase program (“Repurchase Program”).  The Company has authorization to repurchase up to $150 million of its outstanding common stock under the renewed Repurchase Program, which it may repurchase from time to time in open market transactions at prevailing prices or through privately negotiated transactions.  The Company has purchased and retired 394,625 shares of its outstanding common stock for an aggregate cost of approximately $11 million through September 30, 2013 (none of which has occurred in the nine months ended September 30, 2013), with a remaining authorization under the Repurchase Program of $139 million.
	DIVIDEND REINVESTMENT AND STOCK PURCHASE PLAN
	The Company has a Dividend Reinvestment and Stock Purchase Plan (the “DRIP”) which commenced in March 1999 under which 5.5 million shares of the Company’s common stock have been reserved for future issuance.  The DRIP provides for automatic reinvestment of all or a portion of a participant’s dividends from the Company’s shares of common stock.  The DRIP also permits participants to make optional cash investments up to $5,000 a month without restriction and, if the Company waives this limit, for additional amounts subject to certain restrictions and other conditions set forth in the DRIP prospectus filed as part of the Company’s effective registration statement on Form S-3 filed with the Securities and Exchange Commission (“SEC”) for the 5.5 million shares of the Company’s common stock reserved for issuance under the DRIP.
	STOCK OPTION PLANS
	In May 2013, the Company established the 2013 Incentive Stock Plan (the “2013 Plan”) under which a total of 4,600,000 shares have been reserved for issuance.  In May 2004, the Company established the 2004 Incentive Stock Plan (the “2004 Plan”) under which a total of 2,500,000 shares had been reserved for issuance.  The 2004 Plan was terminated upon establishment of the 2013 Plan.  No options have been granted through September 30, 2013 under the 2013 Plan or the 2004 Plan.  In September 2000, the Company established the 2000 Employee Stock Option Plan (“2000 Employee Plan”) and the Amended and Restated 2000 Director Stock Option Plan (“2000 Director Plan,” and together with the 2000 Employee Plan, the “2000 Plans”).  In May 2002, shareholders of the Company approved amendments to both of the 2000 Plans to increase the total shares reserved for issuance under both of the 2000 Plans from 2,700,000 to 4,350,000 shares of the Company’s common stock (from 2,500,000 to 4,000,000 shares under the 2000 Employee Plan and from 200,000 to 350,000 shares under the 2000 Director Plan). As the 2000 Plans expired in 2010, stock options may no longer be issued under those plans.  Stock options granted under the 2000 Employee Plan became exercisable over a five-year period. All stock options granted under the 2000 Director Plan became exercisable in one year.  All options were granted at the fair market value at the dates of grant and have terms of ten years.  As of September 30, 2013 and December 31, 2012, the stock options outstanding, which were all exercisable, had a weighted average remaining contractual life of approximately one and 0.1 years, respectively.
	Information regarding the Company’s stock option plans is summarized below:
		Shares			Weighted Average Exercise Price			Aggregate Intrinsic Value $(000’s)
		Under Options
	Outstanding at January 1, 2013	183,870		$	29.51			-
	Lapsed or Cancelled	-168,870		$	28.53
	Outstanding at September 30, 2013  ($35.59 – $45.47)	15,000		$	40.54			-
	Options exercisable at September 30, 2013	15,000
	Available for grant at September 30, 2013	4,600,000
	No cash was received from options exercised under all stock option plans for the three and nine months ended September 30, 2013 and 2012, respectively.  The total intrinsic value of options exercised during each of the three and nine months ended September 30, 2013 and 2012 was zero.  The Company has a policy of issuing new shares to satisfy stock option exercises.
	The Company recognized no stock options expense for the three and nine months ended September 30, 2013 and 2012, respectively.
	RESTRICTED STOCK AWARDS
	The Company has issued stock awards (“Restricted Stock Awards”) to officers, certain other employees, and nonemployee members of the Board of Directors of the Company, which allow the holders to each receive a certain amount of shares of the Company’s common stock generally over a one to seven-year vesting period, of which 351,592 unvested shares were outstanding at September 30, 2013.  Of the outstanding Restricted Stock Awards issued to executive officers and senior management, 319,667 are contingent upon the Company meeting certain performance goals to be set by the Executive Compensation and Option Committee of the Board of Directors of the Company each year, with the remaining based on time and service.  All currently outstanding and unvested Restricted Stock Awards provided to the officers and certain other employees were issued under the 2004 Plan.  Currently outstanding and unvested Restricted Stock Awards provided to directors were issued under the 2004 Plan.
	On September 12, 2012, the Board of Directors of the Company approved the recommendations and ratified the determinations of the Executive Compensation and Option Committee of the Board of Directors (the “Committee”) with respect to new Restricted Stock Awards totaling 319,667 shares for those executive officers in place on such date.  The new Restricted Stock Awards may vest commencing January 1, 2014 and with the number of Restricted Stock Awards scheduled to be vested and earned on each vesting date on an annual basis over a five to seven year vesting schedule, with each annual vesting of each tranche of Restricted Stock Awards being subject to the attainment of annual performance goals to be set by the Committee for each year.
	Information regarding Restricted Stock Awards grant activity for the nine months ended September 30, 2013 is summarized below:
					Weighted-Average
					Grant – Date
		Shares			Fair Value
	Outstanding at January  1, 2013	134,328		$	31.65
	Granted	68,139			28.65
	Vested	-106,463			33.32
	Forfeited	-146			26.36
	Outstanding at September 30, 2013	95,858		$	27.67
	TSR-BASED AWARDS
	Also on September 12, 2012, the Board of Directors of the Company approved the recommendations and ratified the determinations of the Committee with respect to new multi-year total stockholder return (“TSR”) based awards (the “TSR-Based Awards”) totaling 5,160 performance shares (the “Performance Shares”) for those executive officers in place on such date, each Performance Share evidencing the right to receive $1,000 in the Company’s common stock upon vesting.  In accordance with the amended and restated TSR-Based Awards agreements entered into between the Company and those executive officers in June 2013, the Performance Shares may vest commencing December 31, 2014, with the number of Performance Shares scheduled to be granted annually over the next four years.  The vesting of each tranche of Performance Shares is subject to the attainment at each performance period end of a minimum stock price and either an absolute TSR target or a relative TSR target (the “TSR Performance Targets”) in comparison to a selection of Peer Group REITs, in each case as shall be fixed by the Committee for each performance period.  TSR, for purposes of the TSR-Based Performance Agreements, shall be equal to the share appreciation in the relevant period.  The Company granted 1,032 Performance Shares in the nine months ended September 30, 2013, which were valued in accordance with ASC 718, Compensation - Stock Compensation, at their fair value, utilizing a Monte-Carlo simulation to estimate the probability of the vesting conditions being satisfied.  The Company has reserved shares of common stock under the 2004 Plan for issuance upon vesting of the Performance Shares in accordance with the terms and conditions of the TSR-Based Awards.
	As of September 30, 2013, the Company had $0.7 million of total unrecognized compensation cost related to unvested stock compensation granted under the Company’s stock compensation plans.  That cost is expected to be recognized over a weighted average period of 0.4 years.
	DEFERRED STOCK COMPENSATION PLAN FOR DIRECTORS
	The Amended and Restated Deferred Compensation Plan for Directors, which commenced January 1, 1999, allows non‑employee directors of the Company to elect to defer up to 100 percent of their annual retainer fee into deferred stock units.  The deferred stock units are convertible into an equal number of shares of common stock upon the directors’ termination of service from the Board of Directors or a change in control of the Company, as defined in the plan.  Deferred stock units are credited to each director quarterly using the closing price of the Company’s common stock on the applicable dividend record date for the respective quarter.  Each participating director’s account is also credited for an equivalent amount of deferred stock units based on the dividend rate for each quarter.
	During the nine months ended September 30, 2013 and 2012, 16,332 and 13,057 deferred stock units were earned, respectively.  As of September 30, 2013 and December 31, 2012, there were 130,481 and 115,331 director stock units outstanding, respectively.
	EARNINGS PER SHARE
	Basic EPS excludes dilution and is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding for the period.  Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock.
	The following information presents the Company’s results for the three months ended September 30, 2013 and 2012 in accordance with ASC 260, Earnings Per Share: (in thousands, except  per share amounts)
			Three Months Ended
			September 30,
	Computation of Basic EPS			2013			2012
	Income (loss) from continuing operations		$	-46,046		$	9,827
	Add: Noncontrolling interest in consolidated joint ventures			1,838			85
	Deduct:  Noncontrolling interest in Operating Partnership			5,314			-1,207
	Income (loss) from continuing operations available to common shareholders			-38,894			8,705
	Income from discontinued operations available to common
	shareholders			43,537			5,576
	Net income available to common shareholders		$	4,643		$	14,281
	Weighted average common shares			87,793			87,826
	Basic EPS:
	Income (loss) from continuing operations available to common shareholders		$	-0.44		$	0.10
	Income from discontinued operations available to common
	shareholders			0.49			0.06
	Net income available to common shareholders		$	0.05		$	0.16
			Three Months Ended
			September 30,
	Computation of Diluted EPS			2013			2012
	Income (loss) from continuing operations available to common shareholders		$	-38,894		$	8,705
	Add: Noncontrolling interest in Operating Partnership			-5,314			1,207
	Income (loss) from continuing operations for diluted earnings per share			-44,208			9,912
	Income from discontinued operations for diluted earnings
	per share			49,485			6,349
	Net income available to common shareholders		$	5,277		$	16,261
Weighted average common shares			99,787			100,075
Diluted EPS:
Income (loss) from continuing operations available to common shareholders		$	-0.44		$	0.10
Income from discontinued operations available to common
shareholders			0.49			0.06
Net income available to common shareholders		$	0.05		$	0.16
Contingently issuable shares under the TSR Award plan were excluded from the denominator in 2013 because the criteria had not been met as of September 30, 2013.
The following information presents the Company’s results for the nine months ended September 30, 2013 and 2012 in accordance with ASC 260, Earnings Per Share: (in thousands, except  per share amounts)
		Nine Months Ended
		September 30,
Computation of Basic EPS			2013			2012
Income (loss) from continuing operations		$	-29,506		$	37,018
Add: Noncontrolling interest in consolidated joint ventures			1,962			256
Deduct:  Noncontrolling interest in Operating Partnership			3,295			-4,543
Income (loss) from continuing operations available to common shareholders			-24,249			32,731
Income from discontinued operations available to common
shareholders			63,519			17,418
Net income available to common shareholders		$	39,270		$	50,149
Weighted average common shares			87,724			87,814
Basic EPS:
Income (loss) from continuing operations available to common shareholders		$	-0.28		$	0.37
Income from discontinued operations available to common
shareholders			0.73			0.20
Net income available to common shareholders		$	0.45		$	0.57
		Nine Months Ended
		September 30,
Computation of Diluted EPS			2013			2012
Income (loss) from continuing operations available to common shareholders		$	-24,249		$	32,731
Add: Noncontrolling interest in Operating Partnership			-3,295			4,543
Income (loss) from continuing operations for diluted earnings per share			-27,544			37,274
Income from discontinued operations for diluted earnings
per share			72,218			19,836
Net income available to common shareholders		$	44,674		$	57,110
Weighted average common shares			99,778			100,071
Diluted EPS:
Income (loss) from continuing operations available to common shareholders		$	-0.28		$	0.37
Income from discontinued operations available to common
shareholders			0.73			0.20
Net income available to common shareholders		$	0.45		$	0.57
The following schedule reconciles the shares used in the basic EPS calculation to the shares used in the diluted EPS calculation: (in thousands)
	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2013	2012	2013	2012
Basic EPS shares	87,793	87,826	87,724	87,814
Add:   Operating Partnership – common units	11,994	12,177	12,054	12,184
Restricted Stock Awards	-	72	-	73
Diluted EPS Shares	99,787	100,075	99,778	100,071
Unvested restricted stock outstanding as of September 30, 2013 and 2012 were 351,592  and 105,843, respectively.
Dividends declared per common share for the three month periods ended September 30, 2013 and 2012 was $0.30 and $0.45 per share, respectively.  Dividends declared per common share for the nine month periods ended September 30, 2013 and 2012 was $1.05 and $1.35 per share, respectively.

Noncontrolling_Interests_In_Su

Noncontrolling Interests In Subsidiaries	9 Months Ended
	Sep. 30, 2013
Noncontrolling Interests In Subsidiaries [Abstract]
Noncontrolling Interests In Subsidiaries	16.   NONCONTROLLING INTERESTS IN SUBSIDIARIES
	Noncontrolling interests in subsidiaries in the accompanying consolidated financial statements relate to (i) common units in the Operating Partnership, held by parties other than the Company, and (ii) interests in consolidated joint ventures for the portion of such ventures not owned by the Company.
	OPERATING PARTNERSHIP
	Common Units
	Certain individuals and entities own common units in the Operating Partnership.  A common unit and a share of Common Stock of the Company have substantially the same economic characteristics in as much as they effectively share equally in the net income or loss of the Operating Partnership.  Common unitholders have the right to redeem their common units, subject to certain restrictions.  The redemption is required to be satisfied in shares of Common Stock, cash, or a combination thereof, calculated as follows:  one share of the Company’s Common Stock, or cash equal to the fair market value of a share of the Company’s Common Stock at the time of redemption, for each common unit.  The Company, in its sole discretion, determines the form of redemption of common units (i.e., whether a common unitholder receives Common Stock, cash, or any combination thereof).  If the Company elects to satisfy the redemption with shares of Common Stock as opposed to cash, it is obligated to issue shares of its Common Stock to the redeeming unitholder.  Regardless of the rights described above, the common unitholders may not put their units for cash to the Company or the Operating Partnership under any circumstances.  When a unitholder redeems a common unit, noncontrolling interest in the Operating Partnership is reduced and Mack-Cali Realty Corporation Stockholders’ equity is increased.
	Unit Transactions
	The following table sets forth the changes in noncontrolling interests in subsidiaries which relate to the common units in the Operating Partnership for the nine months ended September 30, 2013.
		Common
		Units
	Balance at January 1, 2013	12,141,836
	Redemption of common units for shares of common stock	-154,661
	Balance at September 30, 2013	11,987,175
	Pursuant to ASC 810, Consolidation, on the accounting and reporting for noncontrolling interests and changes in ownership interests of a subsidiary, changes in a parent’s ownership interest (and transactions with noncontrolling interest unitholders in the subsidiary) while the parent retains its controlling interest in its subsidiary should be accounted for as equity transactions.  The carrying amount of the noncontrolling interest shall be adjusted to reflect the change in its ownership interest in the subsidiary, with the offset to equity attributable to the parent.  Accordingly, as a result of equity transactions which caused changes in ownership percentages between Mack-Cali Realty Corporation stockholders’ equity and noncontrolling interests in the Operating Partnership that occurred during the nine months ended September 30, 2013, the Company has decreased noncontrolling interests in the Operating Partnership and increased additional paid-in capital in Mack-Cali Realty Corporation stockholders’ equity by approximately $0.5 million as of September 30, 2013.
	Noncontrolling Interest Ownership
	As of September 30, 2013 and December 31, 2012, the noncontrolling interest common unitholders owned 12.0 percent and 12.2 percent of the Operating Partnership, respectively.
	CONSOLIDATED JOINT VENTURES
	The Company consolidates certain joint ventures in which it has ownership interests.  Various entities and/or individuals hold noncontrolling interests in these ventures.
	PARTICIPATION RIGHTS
	The Company’s interests in certain real estate projects (three properties and a future development) each provide for the initial distributions of net cash flow solely to the Company, and thereafter, other parties, have participation rights (“Participation Rights”) in 50 percent of the excess net cash flow remaining after the distribution to the Company of the aggregate amount equal to the sum of: (a) the Company’s capital contributions, plus (b) an internal rate of return (“IRR”) of 10 percent per annum.

Segment_Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Segment Reporting	17.   SEGMENT REPORTING
	The Company operates in three business segments: (i) commercial and other real estate, (ii) multifamily real estate, and (iii) multifamily services.  The Company provides leasing, property management, acquisition, development, construction and tenant-related services for its commercial and other real estate and multifamily real estate portfolio. The Company’s multifamily services business also provides similar services for third parties.  The Company no longer considers construction services as a reportable segment as it has significantly reduced its operations.  The Company had no revenues from foreign countries recorded for the nine months ended September 30, 2013 and 2012.  The Company had no long lived assets in foreign locations as of September 30, 2013 and December 31, 2012.  The accounting policies of the segments are the same as those described in Note 2: Significant Accounting Policies, excluding depreciation and amortization.
	The Company evaluates performance based upon net operating income from the combined properties in its real estate segments (commercial and other, and multifamily) and net operating income from its multifamily services segment.
	Selected results of operations for the three and nine months ended September 30, 2013 and 2012 and selected asset information as of September 30, 2013 and December 31, 2012 regarding the Company’s operating segments are as follows.  Amounts for prior periods have been restated to conform to the current period segment reporting presentation.  (dollars in thousands)
			Real Estate
			Commercial				Multifamily				Corporate		Total
			& Other		Multifamily		Services				& Other (d)		Company
	Total revenues:
	Three months ended:
	30-Sep-13	$	153,602	$	3,736	$	6,867	(e)		$	-1,700	$	162,505
	30-Sep-12		155,314		-		-				1,483		156,797
	Nine months ended:
	30-Sep-13	$	465,564	$	8,673	$	18,745	(f)		$	8,782	$	501,764
	30-Sep-12		477,345		-		-				8,946		486,291
	Total operating and
	interest expenses (a):
	Three months ended:
	30-Sep-13	$	72,498	$	1,960	$	8,214			$	30,856	$	113,528
	30-Sep-12		70,584		-		-				35,312		105,896
	Nine months ended:
	30-Sep-13	$	210,917	$	4,066	$	23,345			$	107,061	$	345,389
	30-Sep-12		205,774		-		-				113,115		318,889
	Equity in earnings (loss) of
	unconsolidated joint ventures:
	Three months ended:
	30-Sep-13	$	1,919	$	-2,830	$	682				-	$	-229
	30-Sep-12		2,418		-		-				-		2,418
	Nine months ended:
	30-Sep-13	$	5,149	$	-7,890	$	682				-	$	-2,059
	30-Sep-12		4,751		-		-				-		4,751
	Net operating income (loss) (b):
	Three months ended:
	30-Sep-13	$	83,023	$	-1,054	$	-665			$	-32,556	$	48,748
	30-Sep-12		87,148		-		-				-33,829		53,319
	Nine months ended:
	30-Sep-13	$	259,796	$	-3,283	$	-3,918			$	-98,279	$	154,316
	30-Sep-12		276,322		-		-				-104,169		172,153
	Total assets:
	30-Sep-13	$	3,997,545	$	245,573	$	12,297			$	353,848	$	4,609,263
	31-Dec-12		4,382,843		65,723		12,159				65,320		4,526,045
	Total long-lived assets (c):
	30-Sep-13	$	3,720,747	$	235,629	$	194			$	31,860	$	3,988,430
	31-Dec-12		4,160,362		62,525		-				11,521		4,234,408
	(a)Total operating and interest expenses represent the sum of:  real estate taxes; utilities; operating services; direct construction costs; real estate services expenses; general and administrative and interest expense (net of interest income). All interest expense, net of interest income, (including for property-level mortgages) is excluded from segment amounts and classified in Corporate & Other for all periods.
	(b)Net operating income represents total revenues less total operating and interest expenses (as defined in Note “a”), plus equity in earnings (loss) of unconsolidated joint ventures, for the period.
	(c)Long-lived assets are comprised of net investment in rental property, unbilled rents receivable, goodwill and investments in unconsolidated joint ventures.
	(d)Corporate & Other represents all corporate-level items (including interest and other investment income, interest expense,  non-property general and administrative expense, construction services revenue and direct construction costs) as well as intercompany eliminations necessary to reconcile to consolidated Company totals.
	(e)Includes $665 of fees earned for this period from the multifamily real estate segment, which are eliminated in consolidation.
	(f)Includes $1,432 of fees earned for this period from the multifamily real estate segment, which are eliminated in consolidation.
	The following schedule reconciles net operating income to net income available to common shareholders: (dollars in thousands)
			Three Months Ended				Nine Months Ended
			September 30,				September 30,
			2013		2012		2013			2012
	Net operating income	$	48,748	$	53,319	$	154,316		$	172,153
	Less:
	Depreciation and amortization		-46,094		-43,492		-135,122			-130,720
	Loss from early extinguishment of debt		-		-		-			-4,415
	Impairments		-48,700		-		-48,700			-
	Income from continuing operations		-46,046		9,827		-29,506			37,018
	Discontinued operations:
	Income from discontinued operations		2,164		6,337		11,842			17,446
	Loss from early extinguishment of debt		-		-		-703			-
	Realized gains (losses) and unrealized losses
	on disposition of rental property and impairments, net		47,321		12		61,079			2,390
Total discontinued operations, net		49,485		6,349		72,218			19,836
Net income		3,439		16,176		42,712			56,854
Noncontrolling interest in consolidated joint ventures		1,838		85		1,962			256
Noncontrolling interest in Operating Partnership		5,314		-1,207		3,295			-4,543
Noncontrolling interest in discontinued operations		-5,948		-773		-8,699			-2,418
Net income available to common shareholders	$	4,643	$	14,281	$	39,270		$	50,149

Significant_Accounting_Policie1

Significant Accounting Policies (Policy)	9 Months Ended
	Sep. 30, 2013
Significant Accounting Policies [Abstract]
Rental Property	Rental
	PropertyRental properties are stated at cost less accumulated depreciation and amortization.  Costs directly related to the acquisition, development and construction of rental properties are capitalized.  Acquisition-related costs are expensed as incurred.  Capitalized development and construction costs include pre-construction costs essential to the development of the property, development and construction costs, interest, property taxes, insurance, salaries and other project costs incurred during the period of development.  Capitalized development and construction salaries and related costs approximated $1.9 million and $0.8 million for the three months ended September 30, 2013 and 2012, respectively, and $3.7 million and $2.2 million for the nine months ended September 30, 2013 and 2012, respectively.  Included in total rental property is construction, tenant improvement and development in-progress of $44.9 million and $107.6 million (which included costs related to two properties placed in service during the nine months ended September 30, 2013) as of September 30, 2013 and December 31, 2012, respectively.  Ordinary repairs and maintenance are expensed as incurred; major replacements and betterments, which improve or extend the life of the asset, are capitalized and depreciated over their estimated useful lives.  Fully-depreciated assets are removed from the accounts.
	The Company considers a construction project as substantially completed and held available for occupancy upon the completion of tenant improvements, but no later than one year from cessation of major construction activity (as distinguished from activities such as routine maintenance and cleanup).  If portions of a rental project are substantially completed and occupied by tenants, or held available for occupancy, and other portions have not yet reached that stage, the substantially completed portions are accounted for as a separate project.  The Company allocates costs incurred between the portions under construction and the portions substantially completed and held available for occupancy, primarily based on a percentage of the relative square footage of each portion, and capitalizes only those costs associated with the portion under construction.
	Properties are depreciated using the straight-line method over the estimated useful lives of the assets.  The estimated useful lives are as follows:
	Leasehold interests	Remaining lease term
	Buildings and improvements	5 to 40 years
	Tenant improvements	The shorter of the term of the
		related lease or useful life
	Furniture, fixtures and equipment	5 to 10 years
	Upon acquisition of rental property, the Company estimates the fair value of acquired tangible assets, consisting of land, building and improvements, and identified intangible assets and liabilities assumed, generally consisting of the fair value of (i) above and below market leases, (ii) in-place leases and (iii) tenant relationships.  The Company allocates the purchase price to the assets acquired and liabilities assumed based on their fair values.  The Company records goodwill or a gain on bargain purchase (if any) if the net assets acquired/liabilities assumed exceed the purchase consideration of a transaction.  In estimating the fair value of the tangible and intangible assets acquired, the Company considers information obtained about each property as a result of its due diligence and marketing and leasing activities, and utilizes various valuation methods, such as estimated cash flow projections utilizing appropriate discount and capitalization rates, estimates of replacement costs net of depreciation, and available market information.  The fair value of the tangible assets of an acquired property considers the value of the property as if it were vacant.
	Above-market and below-market lease values for acquired properties are initially recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of fair market lease rates for each corresponding in-place lease, measured over a period equal to the remaining term of the lease for above-market leases and the remaining initial term plus the term of any below-market fixed rate renewal options for below-market leases.  The capitalized above-market lease values are amortized as a reduction of base rental revenue over the remaining terms of the respective leases, and the capitalized below-market lease values are amortized as an increase to base rental revenue over the remaining initial terms plus the terms of any below-market fixed rate renewal options of the respective leases.
	Other intangible assets acquired include amounts for in-place lease values and tenant relationship values, which are based on management’s evaluation of the specific characteristics of each tenant’s lease and the Company’s overall relationship with the respective tenant.  Factors to be considered by management in its analysis of in-place lease values include an estimate of carrying costs during hypothetical expected lease-up periods considering current market conditions, and costs to execute similar leases.  In estimating carrying costs, management includes real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease-up periods, depending on local market conditions.  In estimating costs to execute similar leases, management considers leasing commissions, legal and other related expenses.  Characteristics considered by management in valuing tenant relationships include the nature and extent of the Company’s existing business relationships with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals.  The value of in-place leases are amortized to expense over the remaining initial terms of the respective leases.  The value of tenant relationship intangibles are amortized to expense over the anticipated life of the relationships.
	On a periodic basis, management assesses whether there are any indicators that the value of the Company’s rental properties held for use may be impaired.  In addition to identifying any specific circumstances which may affect a property or properties, management considers other criteria for determining which properties may require assessment for potential impairment.  The criteria considered by management include reviewing low leased percentages, significant near-term lease expirations, recently acquired properties, current and historical operating and/or cash flow losses, near-term mortgage debt maturities or other factors that might impact the Company’s intent and ability to hold the property.  A property’s value is impaired only if management’s estimate of the aggregate future cash flows (undiscounted and without interest charges) to be generated by the property is less than the carrying value of the property.  To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the property over the fair value of the property.  The Company’s estimates of aggregate future cash flows expected to be generated by each property are based on a number of assumptions.  These assumptions are generally based on management’s experience in its local real estate markets and the effects of current market conditions.  The assumptions are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and costs to operate each property.  As these factors are difficult to predict and are subject to future events that may alter management’s assumptions, the future cash flows estimated by management in its impairment analyses may not be achieved, and actual losses or impairments may be realized in the future.
	As of September 30, 2013 and December 31, 2012, the Company’s consolidated real estate joint ventures in which the Company is deemed to be the primary beneficiary have total real estate assets of $210.6 million and $198.3 million, respectively, mortgages of $79.4 million and $77.1 million, respectively, and other liabilities of $16.6 million and $16.5 million, respectively.
Rental Property Held For Sale And Discontinued Operations	Rental Property
	Held for Sale and
	Discontinued
	OperationsWhen assets are identified by management as held for sale, the Company discontinues depreciating the assets and estimates the sales price, net of selling costs, of such assets.  If, in management’s opinion, the estimated net sales price of the assets which have been identified as held for sale is less than the net book value of the assets, a valuation allowance is established.  Properties identified as held for sale and/or disposed of are presented in discontinued operations for all periods presented.  See Note 7: Discontinued Operations.
	If circumstances arise that previously were considered unlikely and, as a result, the Company decides not to sell a property previously classified as held for sale, the property is reclassified as held and used.  A property that is reclassified is measured and recorded individually at the lower of (a) its carrying amount before the property was classified as held for sale, adjusted for any depreciation (amortization) expense that would have been recognized had the property been continuously classified as held and used, or (b) the fair value at the date of the subsequent decision not to sell.
Investments In Unconsolidated Joint Ventures	Investments in
	Unconsolidated
	Joint VenturesThe Company accounts for its investments in unconsolidated joint ventures under the equity method of accounting.  The Company applies the equity method by initially recording these investments at cost, as Investments in Unconsolidated Joint Ventures, subsequently adjusted for equity in earnings and cash contributions and distributions.  The outside basis portion of the Company’s joint ventures is amortized over the anticipated useful lives of the underlying ventures’ tangible and intangible assets acquired and liabilities assumed.  Generally, the Company would discontinue applying the equity method when the investment (and any advances) is reduced to zero and would not provide for additional losses unless the Company has guaranteed obligations of the venture or is otherwise committed to providing further financial support for the investee.    If the venture subsequently generates income, the Company only recognizes its share of such income to the extend it exceeds its share of previously unrecognized losses.
	On a periodic basis, management assesses whether there are any indicators that the value of the Company’s investments in unconsolidated joint ventures may be impaired.  An investment is impaired only if management’s estimate of the value of the investment is less than the carrying value of the investment, and such decline in value is deemed to be other than temporary.  To the extent impairment has occurred, the loss shall be measured as the excess of the carrying amount of the investment over the value of the investment.  The Company’s estimates of value for each investment (particularly in commercial real estate joint ventures) are based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for tenants, changes in market rental rates, and operating costs.  As these factors are difficult to predict and are subject to future events that may alter management’s assumptions, the values estimated by management in its impairment analyses may not be realized, and actual losses or impairment may be realized in the future.  See Note 4: Investments in Unconsolidated Joint Ventures.
Cash And Cash Equivalents	Cash and Cash
	EquivalentsAll highly liquid investments with a maturity of three months or less when purchased are considered to be cash equivalents.
Deferred Financing Costs
	Deferred
	Financing CostsCosts incurred in obtaining financing are capitalized and amortized over the term of the related indebtedness. Amortization of such costs is included in interest expense and was $954,000 and $673,000 for the three months ended September 30, 2013 and 2012, respectively, and $2,379,000 and $1,945,000 for the nine months ended September 30, 2013 and 2012, respectively.  If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (loss) on early extinguishment of debt. Such unamortized costs which were written off amounted to $156,000 and zero for the three months ended September 30, 2013 and 2012, respectively, and $156,000 and $370,000 for the nine months ended September 30, 2013 and 2012, respectively.
Deferred Leasing Costs	Deferred
	Leasing CostsCosts incurred in connection with leases are capitalized and amortized on a straight-line basis over the terms of the related leases and included in depreciation and amortization.  Unamortized deferred leasing costs are charged to amortization expense upon early termination of the lease.  Certain employees of the Company are compensated for providing leasing services to the Properties.  The portion of such compensation, which is capitalized and amortized, approximated $962,000 and $1,156,000 for the three months ended September 30, 2013 and 2012, respectively, and $3,168,000 and $3,312,000 for the nine months ended September 30, 2013 and 2012, respectively.
Goodwill	GoodwillGoodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination.  Management performs an annual impairment test for goodwill during the fourth quarter.  Additionally, management evaluates the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amounts of goodwill may not be fully recoverable.
Derivative Instruments	Derivative
	InstrumentsThe Company measures derivative instruments, including certain derivative instruments embedded in other contracts, at fair value and records them as an asset or liability, depending on the Company’s rights or obligations under the applicable derivative contract.  For derivatives designated and qualifying as fair value hedges, the changes in the fair value of both the derivative instrument and the hedged item are recorded in earnings.  For derivatives designated as cash flow hedges, the effective portions of the derivative are reported in other comprehensive income (“OCI”) and are subsequently reclassified into earnings when the hedged item affects earnings. Changes in fair value of derivative instruments not designated as hedging and ineffective portions of hedges are recognized in earnings in the affected period.
Revenue Recognition	Revenue
	RecognitionBase rental revenue is recognized on a straight-line basis over the terms of the respective leases.  Unbilled rents receivable represents the cumulative amount by which straight-line rental revenue exceeds rents currently billed in accordance with the lease agreements.  Above-market and below-market lease values for acquired properties are initially recorded based on the present value (using a discount rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of fair market lease rates for each corresponding in-place lease, measured over a period equal to the remaining term of the lease for above-market leases and the remaining initial term plus the term of any below-market fixed-rate renewal options for below-market leases.  The capitalized above-market lease values for acquired properties are amortized as a reduction of base rental revenue over the remaining terms of the respective leases, and the capitalized below-market lease values are amortized as an increase to base rental revenue over the remaining initial terms plus the terms of any below-market fixed-rate renewal options of the respective leases.  Escalations and recoveries from tenants are received from tenants for certain costs as provided in the lease agreements.  These costs generally include real estate taxes, utilities, insurance, common area maintenance and other recoverable costs.  See Note 14: Tenant Leases.  Construction services revenue includes fees earned and reimbursements received by the Company for providing construction management and general contractor services to clients.  Construction services revenue is recognized on the percentage of completion method.  Using this method, profits are recorded on the basis of our estimates of the overall profit and percentage of completion of individual contracts.  A portion of the estimated profits is accrued based upon estimates of the percentage of completion of the construction contract.  This revenue recognition method involves inherent risks relating to profit and cost estimates.  Real estate services revenue includes property management, development and leasing commission fees and other services, and payroll and related costs reimbursed from clients.  Fee income derived from the Company’s unconsolidated joint ventures (which are capitalized by such ventures) are recognized to the extent attributable to the unaffiliated ownership interests.  Other income includes income from tenants for additional services arranged for by the Company and income from tenants for early lease terminations.
Allowance For Doubtful Accounts	Allowance for
	Doubtful AccountsManagement periodically performs a detailed review of amounts due from tenants to determine if accounts receivable balances are impaired based on factors affecting the collectability of those balances.  Management’s estimate of the allowance for doubtful accounts requires management to exercise significant judgment about the timing, frequency and severity of collection losses, which affects the allowance and net income.
Income And Other Taxes	Income and
	Other TaxesThe Company has elected to be taxed as a REIT under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”).  As a REIT, the Company generally will not be subject to corporate federal income tax (including alternative minimum tax) on net income that it currently distributes to its shareholders, provided that the Company satisfies certain organizational and operational requirements including the requirement to distribute at least 90 percent of its REIT taxable income to its shareholders.  The Company has elected to treat certain of its corporate subsidiaries as taxable REIT subsidiaries (each a “TRS”).  In general, a TRS of the Company may perform additional services for tenants of the Company and generally may engage in any real estate or non-real estate related business (except for the operation or management of health care facilities or lodging facilities or the providing to any person, under a franchise, license or otherwise, rights to any brand name under which any lodging facility or health care facility is operated).  A TRS is subject to corporate federal income tax.  If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates.  The Company is subject to certain state and local taxes.
	Pursuant to the amended provisions related to uncertain tax provisions of ASC 740, Income Taxes, the Company recognized no material adjustments regarding its tax accounting treatment.  The Company expects to recognize interest and penalties related to uncertain tax positions, if any, as income tax expense, which is included in general and administrative expense.
	In the normal course of business, the Company or one of its subsidiaries is subject to examination by federal, state and local jurisdictions in which it operates, where applicable.  As of September 30, 2013, the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2008 forward.
Earnings Per Share	Earnings
	Per ShareThe Company presents both basic and diluted earnings per share (“EPS”).  Basic EPS excludes dilution and is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding for the period.  Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount.  Shares whose issuance is contingent upon the satisfaction of certain conditions shall be considered outstanding and included in the computation of diluted EPS as follows (i) if all necessary conditions have been satisfied by the end of the period (the events have occurred), those shares shall be included as of the beginning of the period in which the conditions were satisfied (or as of the date of the grant, if later) or (ii)  if all necessary conditions have not been satisfied by the end of the period, the number of contingently issuable shares included in diluted EPS shall be based on the number of shares, if any, that would be issuable if the end of the reporting period were the end of the contingency period (for example, the number of shares that would be issuable based on current period earnings or period-end market price) and if the result would be dilutive. Those contingently issuable shares shall be included in the denominator of diluted EPS as of the beginning of the period (or as of the date of the grant, if later).
Dividends And Distributions Payable	Dividends and
	Distributions
	PayableThe dividends and distributions payable at September 30, 2013 represents dividends payable to common shareholders (87,766,758 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (11,987,175 common units) for all such holders of record as of October 3, 2013 with respect to the third quarter 2013.  The third quarter 2013 common stock dividends and common unit distributions of $0.30 per common share and unit were approved by the Board of Directors on September 12, 2013.  The common stock dividends and common unit distributions payable were paid on October 11, 2013.
	The dividends and distributions payable at December 31, 2012 represents dividends payable to common shareholders (87,537,250 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (12,141,836 common units) for all such holders of record as of January 4, 2013 with respect to the fourth quarter 2012.  The fourth quarter 2012 common stock dividends and common unit distributions of $0.45 per common share and unit were approved by the Board of Directors on December 3, 2012.  The common stock dividends and common unit distributions payable were paid on January 11, 2013.
Costs Incurred For Stock Issuances	Costs Incurred
	For Stock
	IssuancesCosts incurred in connection with the Company’s stock issuances are reflected as a reduction of additional paid-in capital.
Stock Compensation	Stock
	CompensationThe Company accounts for stock compensation in accordance with the provisions of ASC 718, Compensation-Stock Compensation.  These provisions require that the estimated fair value of restricted stock (“Restricted Stock Awards”), TSR-based Performance Shares and stock options (if any) at the grant date be amortized ratably into expense over the appropriate vesting period.  The Company recorded stock compensation expense of $755,000 and $579,000 for the three months ended September 30, 2013 and 2012, respectively, and $2,402,000 and $1,971,000 for the nine months ended September 30, 2013 and 2012, respectively.
Other Comprehensive Income	Other
	Comprehensive
	IncomeOther comprehensive income (loss) includes items that are recorded in equity, such as unrealized holding gains or losses on marketable securities available for sale.  There was no difference in other comprehensive income to net income for the three and nine months ended September 30, 2013 and 2012,  and no accumulated other comprehensive income as of September 30, 2013 and 2012.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2013
Significant Accounting Policies [Abstract]
Estimated Useful Lives Of Assets	Leasehold interests	Remaining lease term
	Buildings and improvements	5 to 40 years
	Tenant improvements	The shorter of the term of the
		related lease or useful life
	Furniture, fixtures and equipment	5 to 10 years

Real_Estate_Transactions_Table

Real Estate Transactions (Tables)	9 Months Ended
	Sep. 30, 2013
Real Estate Transactions [Abstract]
Schedule Of Purchase Price Allocation
											Total
			Alterra 1A				Alterra 1B				Acquisitions
	Land	$	9,042			$	12,055			$	21,097
	Buildings and improvements		50,671				71,409				122,080
	Furniture, fixtures and equipment		801				1,474				2,275
	In-place lease values		931	-1			3,148	-1			4,079
			61,445				88,086				149,531
	Less: Below market lease values		195	-1			136	-1			331
			195				136				331
	Net cash paid at acquisition	$	61,250			$	87,950			$	149,200
	(1) In-place lease values and below market lease values will be amortized over one year or less.
Schedule Of Consolidation Amounts
	Land		$	5,585
	Construction in progress			3,387
				8,972
	Cash and cash equivalents			79
	Other assets			47
	Accounts payable			-325
				-199
	Noncontrolling interest recorded upon consolidation			-1,252
	Net assets recorded upon consolidation		$	7,521
Schedule Of Properties Which Commenced Initial Operations
							Garage			Development			Development
					# of	Rentable	Parking			Costs Incurred			Costs Per
	Date	Property/Address	Location	Type	Bldgs.	Square Feet	Spaces			by Company			Square Foot
	6/5/13	14 Sylvan Way	Parsippany, New Jersey	Office	1	203,506	-		$	51,484	(a)	$	253
	8/1/13	Port Imperial South 4/5	Weehawken, New Jersey	Parking/Retail	1	16,736	850			71,107	(b)		N/A
	Totals				2	220,242	850		$	122,591
	(a)Development costs included approximately $13.0 million in land costs and $4.3 million in leasing costs.  Amounts are as of September 30, 2013.
	(b)Development costs included approximately $13.1 million in land costs.  Amounts are as of September 30, 2013.
Schedule Of Property Sales
					Rentable			Net			Net
	Sale			# of	Square			Sales			Book		Realized
	Date	Property/Address	Location	Bldgs.	Feet			Proceeds			Value		Gain (loss)
	4/10/13	19 Skyline Drive (a)	Hawthorne, New York	1	248,400		$	16,131		$	16,005	$	126
	4/26/13	55 Corporate Drive	Bridgewater, New Jersey	1	204,057			70,967			51,308		19,659
	5/2/13	200 Riser Road	Little Ferry, New Jersey	1	286,628			31,775			14,852		16,923
	5/13/13	777 Passaic Avenue	Clifton, New Jersey	1	75,000			5,640			3,713		1,927
	5/30/13	16 and 18 Sentry Parkway West (b)	Blue Bell, Pennsylvania	2	188,103			19,041			19,721		-680
	5/31/13	51 Imclone Drive (c)	Branchburg, New Jersey	1	63,213			6,101			5,278		823
	6/28/13	40 Richards Avenue	Norwalk, Connecticut	1	145,487			15,858			17,027		-1,169
	7/10/13	106 Allen Road	Bernards Township, New Jersey	1	132,010			17,677			13,522		4,155
	8/27/13	Pennsylvania office portfolio (d) (e)	Suburban Philadelphia, Pennsylvania	15	1,663,511			207,425			164,259		43,166
	Totals:			24	3,006,409		$	390,615		$	305,685	$	84,930
	(a)	The Company recognized a valuation allowance of $7.1 million on this property at December 31, 2012.  In connection with the sale, the Company provided an interest-free note receivable to the buyer of $5 million (with a net present value of $3.6 million at September 30, 2013) which matures in ten years and requires monthly payments of principal.  See Note 5: Deferred charges, goodwill and other assets.
	(b)	The Company recorded an $8.4 million impairment charge on these properties at December 31, 2012.  The Company has retained a subordinated interest in these properties.
	(c)	The property was encumbered by a mortgage loan which was satisfied by the Company at the time of the sale.  The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations:  loss from early extinguishment of debt for the nine months ended September 30, 2013.
	(d)	In order to reduce the carrying value of five of the properties to their estimated fair market values, the Company recorded impairment charges of $23.9 million at June 30, 2013.  The fair value used in the impairment charges was based on the purchase and sale agreement for the properties ultimately sold.
	(e)	The portfolio sale also included three developable land parcels.

Investments_In_Unconsolidated_1

Investments In Unconsolidated Joint Ventures (Tables)	9 Months Ended
	Sep. 30, 2013
Investments In Unconsolidated Joint Ventures [Abstract]
Summary Of Financial Position Of Unconsolidated Joint Ventures
				September 30,			December 31,
				2013			2012
	Assets:
	Rental property, net		$	736,487		$	180,254
	Loan receivable			44,459			42,276
	Other assets			434,714			311,847
	Total assets		$	1,215,660		$	534,377
	Liabilities and partners'/
	members' capital:
	Mortgages and loans payable		$	600,473		$	168,908
	Other liabilities			71,552			12,141
	Partners'/members' capital			543,635			353,328
	Total liabilities and
	partners'/members' capital		$	1,215,660		$	534,377
Summary Of Company's Investment In Unconsolidated Joint Ventures
			September 30,			December 31,
	Entity		2013			2012
	Plaza VIII & IX Associates, L.L.C.	$	4,065		$	4,321
	South Pier at Harborside		-2,095			-1,225
	Red Bank Corporate Plaza, L.L.C.		3,972			3,876
	12 Vreeland Associates, L.L.C.		5,439			12,840
	Boston Downtown Crossing		-			13,012
	Gale Jefferson, L.L.C.		-			1,029
	Stamford SM LLC		35,667			34,006
	Marbella RoseGarden, L.L.C.		15,976			16,918
	RoseGarden Monaco Holdings, L.L.C.		3,524			4,761
	Rosewood Lafayette Holdings, L.L.C.		1,119			1,988
	PruRose Port Imperial South 15, LLC		-			606
	Rosewood Morristown, L.L.C.		6,603			7,091
	Overlook Ridge JV, L.L.C.		178			31
	Overlook Ridge, L.L.C.		-			-
	Overlook Ridge JV 2C/3B, L.L.C.		-			179
	Roseland/North Retail, L.L.C.		1,967			2,161
	BNES Associates III		1,708			1,955
	Portside Master Company, L.L.C.		3,449			3,651
	PruRose Port Imperial South 13, LLC		2,451			2,920
	Roseland/Port Imperial Partners, L.P.		2,755			2,582
	RoseGarden Marbella South, L.L.C.		7,160			6,182
	PruRose Riverwalk G, L.L.C.		3,515			4,136
	Elmajo Urban Renewal Associates, LLC		232			629
	Estuary Urban Renewal Unit B, LLC		74			220
	RiverPark at Harrison I, L.L.C.		3,404			2,606
	150 Main Street, L.L.C.		-			2,395
	RoseGarden Monaco, L.L.C.		1,208			1,165
	Hillsborough 206 Holdings, L.L.C.		1,989			1,967
	Grand Jersey Waterfront Urban Renewal Associates, L.L.C.		397			337
	Crystal House Apartments Investors LLC		26,928			-
	Other		174			-
	Company's investment in unconsolidated joint ventures	$	131,859		$	132,339
Summary Of Results Of Operations Of Unconsolidated Joint Ventures
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2013			2012			2013		2012
	Total revenues	$	99,117		$	17,311		$	202,810	$	44,369
	Operating and other expenses		-48,621			-9,169			-137,889		-25,428
	Depreciation and amortization		-11,556			-2,497			-24,730		-7,285
	Interest expense		-3,934			-1,675			-9,256		-5,017
	Net income	$	35,006		$	3,970		$	30,935	$	6,639
Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures
			Three Months Ended						Nine Months Ended
			September 30,						September 30,
	Entity		2013			2012			2013		2012
	Plaza VIII & IX Associates, L.L.C.	$	24		$	21		$	52	$	43
	South Pier at Harborside		835			1,080			1,380		1,884
	Red Bank Corporate Plaza, L.L.C.		99			94			306		298
	12 Vreeland Associates, L.L.C.		-25			279			-1		603
	Boston Downtown Crossing		-			-6			646		-333
	Gale Jefferson, L.L.C.		-			23			68		63
	Stamford SM LLC		1,023			927			2,805		2,193
	Marbella RoseGarden, L.L.C.		-170			-			-446		-
	RoseGarden Monaco Holdings, L.L.C.		-416			-			-1,238		-
	Rosewood Lafayette Holdings, L.L.C.		-295			-			-869		-
	PruRose Port Imperial South 15, LLC		-			-			-606		-
	Rosewood Morristown, L.L.C.		-152			-			-393		-
	Overlook Ridge JV, L.L.C.		-			-			-		-
	Overlook Ridge, L.L.C.		-			-			-		-
	Overlook Ridge JV 2C/3B, L.L.C.		53			-			204		-
	Roseland/North Retail, L.L.C.		-62			-			-194		-
	BNES Associates III		-37			-			-108		-
	Portside Master Company, L.L.C.		-109			-			-222		-
	PruRose Port Imperial South 13, LLC		-181			-			-459		-
	Roseland/Port Imperial Partners, L.P.		-			-			-		-
	RoseGarden Marbella South, L.L.C.		-20			-			-57		-
	PruRose Riverwalk G, L.L.C.		-198			-			-576		-
	Elmajo Urban Renewal Associates, LLC		-87			-			-255		-
	Estuary Urban Renewal Unit B, LLC		-44			-			-107		-
	RiverPark at Harrison I, L.L.C.		-			-			-		-
	150 Main Street, L.L.C.		-			-			-		-
	RoseGarden Monaco, L.L.C.		-			-			-		-
	Hillsborough 206 Holdings, L.L.C.		-			-			-		-
	Grand Jersey Waterfront Urban Renewal Associates, L.L.C.		-			-			-		-
	Crystal House Apartments Investors LLC		-1,149			-			-2,671		-
	Other		682						682
	Company's equity in earnings of unconsolidated joint ventures	$	-229		$	2,418		$	-2,059	$	4,751

Deferred_Charges_Goodwill_And_1

Deferred Charges, Goodwill And Other Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Deferred Charges, Goodwill And Other Assets [Abstract]
Schedule Of Deferred Charges, Goodwill And Other Assets
			September 30,		December 31,
	(dollars in thousands)		2013		2012
	Deferred leasing costs	$	253,654	$	267,197
	Deferred financing costs		25,396		20,447
			279,050		287,644
	Accumulated amortization		-124,437		-131,613
	Deferred charges, net		154,613		156,031
	Notes receivable		22,047		-
	In-place lease values, related intangible and other assets, net		13,501		19,284
	Goodwill		2,945		2,945
	Prepaid expenses and other assets, net		91,293		26,614
	Total deferred charges, goodwill and other assets	$	284,399	$	204,874

Restricted_Cash_Tables

Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2013
Restricted Cash [Abstract]
Schedule Of Restricted Cash
			September 30,		December 31,
			2013		2012
	Security deposits	$	7,780	$	7,165
	Escrow and other reserve funds		11,433		12,174
	Total restricted cash	$	19,213	$	19,339

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2013
Discontinued Operations [Abstract]
Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)
		Three Months Ended				Nine  Months Ended
		September 30,				September 30,
			2013		2012		2013		2012
	Total revenues	$	6,405	$	17,376	$	33,610	$	51,790
	Operating and other expenses		-2,472		-6,606		-13,454		-20,308
	Depreciation and amortization		-1,769		-4,351		-8,196		-13,363
	Interest expense (net of interest income)		-		-82		-118		-673
	Income from discontinued operations		2,164		6,337		11,842		17,446
	Loss from early extinguishment of debt		-		-		-703		-
	Impairments		-		-		-23,851		-
	Unrealized losses on disposition of rental property		-		-		-		-2,134
	Realized gains on disposition of rental property		47,321		12		84,930		4,524
	Realized gains (losses) and unrealized losses on
	disposition of rental property and impairments, net		47,321		12		61,079		2,390
	Total discontinued operations, net	$	49,485	$	6,349	$	72,218	$	19,836

Senior_Unsecured_Notes_Tables

Senior Unsecured Notes (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Summary Of Senior Unsecured Notes
			September 30,		December 31,	Effective
			2013		2012	Rate (1)
	4.600% Senior Unsecured Notes, due June 15, 2013 (2)		-	$	99,987	4.742	%
	5.125% Senior Unsecured Notes, due February 15, 2014	$	200,090		200,270	5.110	%
	5.125% Senior Unsecured Notes, due January 15, 2015		149,879		149,810	5.297	%
	5.800% Senior Unsecured Notes, due January 15, 2016		200,180		200,237	5.806	%
	2.500% Senior Unsecured Notes, due  December 15, 2017		248,781		248,560	2.803	%
	7.750% Senior Unsecured Notes, due August 15, 2019		248,746		248,585	8.017	%
	4.500% Senior Unsecured Notes, due April 18, 2022		299,490		299,445	4.612	%
	3.150% Senior Unsecured Notes, due May 15, 2023		269,171		-	3.517	%
	Total senior unsecured notes	$	1,616,337	$	1,446,894
	(1)Includes the cost of terminated treasury lock agreements (if any), offering and other transaction costs and the discount/premium on the notes, as applicable.
	(2)These notes were paid at maturity using available cash.

Unsecured_Revolving_Credit_Fac1

Unsecured Revolving Credit Facility (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Change In The Operating Partnership's Unsecured Debt Ratings
	Operating Partnership's	Interest Rate -
	Unsecured Debt Ratings:	Applicable Basis Points	Facility Fee
	Higher of S&P or Moody's	Above LIBOR	Basis Points
	No ratings or less than BBB-/Baa3	170.0	35.0
	BBB- or Baa3	130.0	30.0
	BBB or Baa2(current)	110.0	20.0
	BBB+ or Baa1	100.0	15.0
	A- or A3 or higher	92.5	12.5

Mortgages_Loans_Payable_And_Ot1

Mortgages, Loans Payable And Other Obligations (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]
Summary Of Mortgages, Loans Payable And Other Obligations
				Effective			September 30,		December 31,
	Property Name	Lender		Rate (a)			2013		2012	Maturity
	51 Imclone (b)	Wells Fargo CMBS		8.390	%		-	$	3,878	-
	9200 Edmonston Road (c)	Principal Commercial Funding L.L.C.		5.534	%	$	4,158		4,305	5/1/13
	6305 Ivy Lane (d)	RGA Reinsurance Company		5.525	%		5,811		5,984	10/1/13
	Port Imperial South 4/5	Wells Fargo Bank N.A.	LIBOR+3.50		%		36,355		34,889	12/31/13
	395 West Passaic	State Farm Life Insurance Co.		6.004	%		9,858		10,231	5/1/14
	6301 Ivy Lane	RGA Reinsurance Company		5.520	%		5,514		5,667	7/1/14
	35 Waterview Boulevard	Wells Fargo CMBS		6.348	%		18,502		18,746	8/11/14
	6 Becker, 85 Livingston,	Wells Fargo CMBS		10.220	%		63,945		63,126	8/11/14
	75 Livingston &
	20 Waterview (e)
	4 Sylvan	Wells Fargo CMBS		10.190	%		14,524		14,485	8/11/14
	10 Independence	Wells Fargo CMBS		12.440	%		16,536		16,251	8/11/14
	Port Imperial South	Wells Fargo Bank N.A.	LIBOR+1.75		%		43,045		42,168	9/19/15
	4 Becker	Wells Fargo CMBS		9.550	%		38,681		38,274	5/11/16
	5 Becker (f)	Wells Fargo CMBS		12.830	%		12,912		12,507	5/11/16
	210 Clay	Wells Fargo CMBS		13.420	%		12,638		12,275	5/11/16
	Various (g)	Prudential Insurance		6.332	%		147,939		149,281	1/15/17
	23 Main Street	JPMorgan CMBS		5.587	%		29,997		30,395	9/1/18
	Harborside Plaza 5	The Northwestern Mutual Life		6.842	%		225,996		228,481	11/1/18
		Insurance Co. & New York Life
		Insurance Co.
	233 Canoe Brook Road	The Provident Bank		4.375	%		3,895		3,945	2/1/19
	100 Walnut Avenue	Guardian Life Insurance Co.		7.311	%		18,852		19,025	2/1/19
	One River Center (h)	Guardian Life Insurance Co.		7.311	%		43,186		43,582	2/1/19
	Total mortgages, loans payable and other obligations					$	752,344	$	757,495
	(a)	Reflects effective rate of debt, including deferred financing costs, comprised of the cost of terminated treasury lock agreements (if any), debt initiation costs, mark-to-market adjustment of acquired debt and other transaction costs, as applicable.
	(b)	With the sale of the property on May 31, 2013, the mortgage was satisfied by the Company.  The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations:  loss from early extinguishment of debt for the nine months ended September 30, 2013.
	(c)	The lease with the tenant occupying 100 percent of the building expired on May 1, 2013 and the tenant continues to occupy the building on a month-to-month basis.  The mortgage loan matured on May 1, 2013 and was not repaid.  The Company received a notice of default from the lender on July 17, 2013.  The Company has requested a modification of the loan terms and is also in discussions regarding a deed-in-lieu of foreclosure with the lender.
	(d)	On October 1, 2013, the Company repaid the mortgage loan at par, using available cash.  The original maturity date was January 1, 2014.
	(e)	Mortgage is cross collateralized by the four properties.
	(f)	The cash flow from this property is insufficient to cover operating costs and debt service.  Consequently, the Company notified the lender and suspended debt service payments in August 2013.  The Company has begun discussions with the lender regarding a modification of loan terms.  The Company recorded an impairment charge on this asset along with eight other office properties as of September 30, 2013.  See Note 3: Real Estate Transactions – Impairments.
	(g)	Mortgage is collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.
	(h)	Mortgage is collateralized by the three properties comprising One River Center.

Commitments_And_Contingencies_

Commitments And Contingencies (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies [Abstract]
Future Minimum Rental Payments Of Ground Leases
	Year		Amount
	October 1 through December 31, 2013	$	88
	2014		367
	2015		371
	2016		371
	2017		267
	2018 through 2084		16,051
	Total	$	17,515

Tenant_Leases_Tables

Tenant Leases (Tables)	9 Months Ended
	Sep. 30, 2013
Tenant Leases [Abstract]
Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases
	Year		Amount
	October 1 through December 31, 2013	$	125,682
	2014		495,819
	2015		444,042
	2016		399,155
	2017		348,011
	2018 and thereafter		1,290,172
	Total	$	3,102,881

MackCali_Realty_Corporation_St1

Mack-Cali Realty Corporation Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Schedule Of Stock Option Plans
		Shares			Weighted Average Exercise Price			Aggregate Intrinsic Value $(000’s)
		Under Options
	Outstanding at January 1, 2013	183,870		$	29.51			-
	Lapsed or Cancelled	-168,870		$	28.53
	Outstanding at September 30, 2013  ($35.59 – $45.47)	15,000		$	40.54			-
	Options exercisable at September 30, 2013	15,000
	Available for grant at September 30, 2013	4,600,000
Schedule Of Restricted Stock Awards
					Weighted-Average
					Grant – Date
		Shares			Fair Value
	Outstanding at January  1, 2013	134,328		$	31.65
	Granted	68,139			28.65
	Vested	-106,463			33.32
	Forfeited	-146			26.36
	Outstanding at September 30, 2013	95,858		$	27.67
Schedule Of Basic And Diluted Earnings Per Share	The following information presents the Company’s results for the three months ended September 30, 2013 and 2012 in accordance with ASC 260, Earnings Per Share: (in thousands, except  per share amounts)
			Three Months Ended
			September 30,
	Computation of Basic EPS			2013			2012
	Income (loss) from continuing operations		$	-46,046		$	9,827
	Add: Noncontrolling interest in consolidated joint ventures			1,838			85
	Deduct:  Noncontrolling interest in Operating Partnership			5,314			-1,207
	Income (loss) from continuing operations available to common shareholders			-38,894			8,705
	Income from discontinued operations available to common
	shareholders			43,537			5,576
	Net income available to common shareholders		$	4,643		$	14,281
	Weighted average common shares			87,793			87,826
	Basic EPS:
	Income (loss) from continuing operations available to common shareholders		$	-0.44		$	0.10
	Income from discontinued operations available to common
	shareholders			0.49			0.06
	Net income available to common shareholders		$	0.05		$	0.16
			Three Months Ended
			September 30,
	Computation of Diluted EPS			2013			2012
	Income (loss) from continuing operations available to common shareholders		$	-38,894		$	8,705
	Add: Noncontrolling interest in Operating Partnership			-5,314			1,207
	Income (loss) from continuing operations for diluted earnings per share			-44,208			9,912
	Income from discontinued operations for diluted earnings
	per share			49,485			6,349
	Net income available to common shareholders		$	5,277		$	16,261
	Weighted average common shares			99,787			100,075
	Diluted EPS:
	Income (loss) from continuing operations available to common shareholders		$	-0.44		$	0.10
	Income from discontinued operations available to common
	shareholders			0.49			0.06
	Net income available to common shareholders		$	0.05		$	0.16
	Contingently issuable shares under the TSR Award plan were excluded from the denominator in 2013 because the criteria had not been met as of September 30, 2013.
	The following information presents the Company’s results for the nine months ended September 30, 2013 and 2012 in accordance with ASC 260, Earnings Per Share: (in thousands, except  per share amounts)
			Nine Months Ended
			September 30,
	Computation of Basic EPS			2013			2012
	Income (loss) from continuing operations		$	-29,506		$	37,018
	Add: Noncontrolling interest in consolidated joint ventures			1,962			256
	Deduct:  Noncontrolling interest in Operating Partnership			3,295			-4,543
	Income (loss) from continuing operations available to common shareholders			-24,249			32,731
	Income from discontinued operations available to common
	shareholders			63,519			17,418
	Net income available to common shareholders		$	39,270		$	50,149
	Weighted average common shares			87,724			87,814
	Basic EPS:
	Income (loss) from continuing operations available to common shareholders		$	-0.28		$	0.37
	Income from discontinued operations available to common
	shareholders			0.73			0.20
	Net income available to common shareholders		$	0.45		$	0.57
			Nine Months Ended
			September 30,
	Computation of Diluted EPS			2013			2012
	Income (loss) from continuing operations available to common shareholders		$	-24,249		$	32,731
	Add: Noncontrolling interest in Operating Partnership			-3,295			4,543
	Income (loss) from continuing operations for diluted earnings per share			-27,544			37,274
	Income from discontinued operations for diluted earnings
	per share			72,218			19,836
	Net income available to common shareholders		$	44,674		$	57,110
	Weighted average common shares			99,778			100,071
	Diluted EPS:
	Income (loss) from continuing operations available to common shareholders		$	-0.28		$	0.37
	Income from discontinued operations available to common
	shareholders			0.73			0.20
Net income available to common shareholders		$	0.45		$	0.57
The following schedule reconciles the shares used in the basic EPS calculation to the shares used in the diluted EPS calculation: (in thousands)
	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2013	2012	2013	2012
Basic EPS shares	87,793	87,826	87,724	87,814
Add:   Operating Partnership – common units	11,994	12,177	12,054	12,184
Restricted Stock Awards	-	72	-	73
Diluted EPS Shares	99,787	100,075	99,778	100,071

Noncontrolling_Interests_In_Su1

Noncontrolling Interests In Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2013
Noncontrolling Interests In Subsidiaries [Abstract]
Changes In Noncontrolling Interests Of Subsidiaries
		Common
		Units
	Balance at January 1, 2013	12,141,836
	Redemption of common units for shares of common stock	-154,661
	Balance at September 30, 2013	11,987,175

Segment_Reporting_Tables

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]
Schedule Of Segment Reporting Information, By Segment	Selected results of operations for the three and nine months ended September 30, 2013 and 2012 and selected asset information as of September 30, 2013 and December 31, 2012 regarding the Company’s operating segments are as follows.  Amounts for prior periods have been restated to conform to the current period segment reporting presentation.  (dollars in thousands)
			Real Estate
			Commercial				Multifamily				Corporate		Total
			& Other		Multifamily		Services				& Other (d)		Company
	Total revenues:
	Three months ended:
	30-Sep-13	$	153,602	$	3,736	$	6,867	(e)		$	-1,700	$	162,505
	30-Sep-12		155,314		-		-				1,483		156,797
	Nine months ended:
	30-Sep-13	$	465,564	$	8,673	$	18,745	(f)		$	8,782	$	501,764
	30-Sep-12		477,345		-		-				8,946		486,291
	Total operating and
	interest expenses (a):
	Three months ended:
	30-Sep-13	$	72,498	$	1,960	$	8,214			$	30,856	$	113,528
	30-Sep-12		70,584		-		-				35,312		105,896
	Nine months ended:
	30-Sep-13	$	210,917	$	4,066	$	23,345			$	107,061	$	345,389
	30-Sep-12		205,774		-		-				113,115		318,889
	Equity in earnings (loss) of
	unconsolidated joint ventures:
	Three months ended:
	30-Sep-13	$	1,919	$	-2,830	$	682				-	$	-229
	30-Sep-12		2,418		-		-				-		2,418
	Nine months ended:
	30-Sep-13	$	5,149	$	-7,890	$	682				-	$	-2,059
	30-Sep-12		4,751		-		-				-		4,751
	Net operating income (loss) (b):
	Three months ended:
	30-Sep-13	$	83,023	$	-1,054	$	-665			$	-32,556	$	48,748
	30-Sep-12		87,148		-		-				-33,829		53,319
	Nine months ended:
	30-Sep-13	$	259,796	$	-3,283	$	-3,918			$	-98,279	$	154,316
	30-Sep-12		276,322		-		-				-104,169		172,153
	Total assets:
	30-Sep-13	$	3,997,545	$	245,573	$	12,297			$	353,848	$	4,609,263
	31-Dec-12		4,382,843		65,723		12,159				65,320		4,526,045
	Total long-lived assets (c):
	30-Sep-13	$	3,720,747	$	235,629	$	194			$	31,860	$	3,988,430
	31-Dec-12		4,160,362		62,525		-				11,521		4,234,408
	(a)Total operating and interest expenses represent the sum of:  real estate taxes; utilities; operating services; direct construction costs; real estate services expenses; general and administrative and interest expense (net of interest income). All interest expense, net of interest income, (including for property-level mortgages) is excluded from segment amounts and classified in Corporate & Other for all periods.
	(b)Net operating income represents total revenues less total operating and interest expenses (as defined in Note “a”), plus equity in earnings (loss) of unconsolidated joint ventures, for the period.
	(c)Long-lived assets are comprised of net investment in rental property, unbilled rents receivable, goodwill and investments in unconsolidated joint ventures.
	(d)Corporate & Other represents all corporate-level items (including interest and other investment income, interest expense,  non-property general and administrative expense, construction services revenue and direct construction costs) as well as intercompany eliminations necessary to reconcile to consolidated Company totals.
	(e)Includes $665 of fees earned for this period from the multifamily real estate segment, which are eliminated in consolidation.
	(f)Includes $1,432 of fees earned for this period from the multifamily real estate segment, which are eliminated in consolidation.
	The following schedule reconciles net operating income to net income available to common shareholders: (dollars in thousands)
			Three Months Ended				Nine Months Ended
			September 30,				September 30,
			2013		2012		2013			2012
	Net operating income	$	48,748	$	53,319	$	154,316		$	172,153
	Less:
	Depreciation and amortization		-46,094		-43,492		-135,122			-130,720
	Loss from early extinguishment of debt		-		-		-			-4,415
	Impairments		-48,700		-		-48,700			-
	Income from continuing operations		-46,046		9,827		-29,506			37,018
	Discontinued operations:
	Income from discontinued operations		2,164		6,337		11,842			17,446
	Loss from early extinguishment of debt		-		-		-703			-
	Realized gains (losses) and unrealized losses
	on disposition of rental property and impairments, net		47,321		12		61,079			2,390
	Total discontinued operations, net		49,485		6,349		72,218			19,836
	Net income		3,439		16,176		42,712			56,854
	Noncontrolling interest in consolidated joint ventures		1,838		85		1,962			256
Noncontrolling interest in Operating Partnership		5,314		-1,207		3,295			-4,543
Noncontrolling interest in discontinued operations		-5,948		-773		-8,699			-2,418
Net income available to common shareholders	$	4,643	$	14,281	$	39,270		$	50,149

Organization_And_Basis_Of_Pres1

Organization And Basis Of Presentation (Details)	9 Months Ended
	Sep. 30, 2013
	state
	sqft
	property
Real Estate Properties [Line Items]
Number of properties owned or investment interests	275
Aggregate square feet of the property owned or investment interest	30,700,000
Number of states where properties are located	7
Office And Office/Flex Buildings [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	251
Aggregate square feet of the property owned or investment interest	30,200,000
Unconsolidated Joint Venture Office Buildings [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	21
Aggregate square feet of the property owned or investment interest	2,600,000
Industrial/Warehouse Facilities [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	6
Aggregate square feet of the property owned or investment interest	387,400
Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	9
Number of units	3,319
Unconsolidated Joint Venture Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	7
Number of units	2,597
Retail [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	5
Aggregate square feet of the property owned or investment interest	115,600
Unconsolidated Joint Venture Retail Buildings [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	2
Aggregate square feet of the property owned or investment interest	81,500
Unconsolidated Joint Venture Hotel [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	1
Number of units	350
Land [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	3

Significant_Accounting_Policie3

Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Oct. 03, 2013	Jan. 04, 2013
				property
Significant Accounting Policies [Line Items]
Capitalized development and construction salaries and other related costs	$1,900,000		$800,000	$3,700,000	$2,200,000
Rental property in-progress	44,900,000	107,600,000		44,900,000
Number of properties placed into service				2
Maximum period after cessation of major construction activity that projects are considered complete				1 year
Consolidated joint ventures, total real estate assets	210,600,000	198,300,000		210,600,000
Consolidated joint ventures, mortgages	79,400,000	77,100,000		79,400,000
Consolidated joint ventures, other liabilities	16,600,000	16,500,000		16,600,000
Amortization of deferred financing costs	954,000		673,000	2,379,000	1,945,000
Write off of unamortized deferred financing costs	156,000		0	156,000	370,000
Deferred leasing costs	962,000		1,156,000	3,168,000	3,312,000
Income taxes, material adjustment amount				0
Common stock, shares outstanding	88,021,807	87,536,292		88,021,807		87,766,758	87,537,250
Common units outstanding	11,987,175	12,141,836		11,987,175		11,987,175	12,141,836
Common stock dividends and common unit distributions per share	$0.30	$0.45
Restricted stock expense	755,000		579,000	2,402,000	1,971,000
Difference between other comprehensive income and net income	0		0	0	0
Accumulated other comprehensive income	$0		$0	$0	$0
Third Quarter 2013 [Member]
Significant Accounting Policies [Line Items]
Distributions payable, record date				3-Oct-13
Common stock dividends and common unit distributions payable, date				11-Oct-13
Fourth Quarter 2012 [Member]
Significant Accounting Policies [Line Items]
Distributions payable, record date				4-Jan-13
Common stock dividends and common unit distributions payable, date				11-Jan-13

Significant_Accounting_Policie4

Significant Accounting Policies (Estimated Useful Lives Of Assets) (Details)	9 Months Ended
	Sep. 30, 2013
Minimum [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	5 years
Minimum [Member] | Furniture, Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	5 years
Maximum [Member] | Buildings And Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	40 years
Maximum [Member] | Furniture, Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	10 years

Real_Estate_Transactions_Narra

Real Estate Transactions (Narrative) (Details) (USD $)

0 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Oct. 23, 2012

Aug. 22, 2013

Oct. 23, 2012

Jan. 18, 2013

Apr. 04, 2013

Sep. 30, 2013

Aug. 27, 2013

Jun. 30, 2013

Sep. 30, 2013

Aug. 27, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Aug. 22, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

item

Keystone Affiliates [Member]

JMP Eastchester, L.L.C. [Member]

Hudson Valley Land Holdings, L.L.C. [Member]

Hudson Valley Land Holdings, L.L.C. [Member]

Alterra At Overlook Ridge IA [Member]

Alterra At Overlook Ridge IB [Member]

19 Skyline Drive [Member]

Pennsylvania Office Portfolio [Member]

Pennsylvania Office Portfolio [Member]

Pennsylvania Office Portfolio [Member]

Pennsylvania Office Portfolio [Member]

New Jersey [Member]

Eastchester Project [Member]

Eastchester Project [Member]

Eastchester Project [Member]

150 Main Street, L.L.C. [Member]

Construction Loan [Member]

Minimum [Member]

Maximum [Member]

item

item

loan

property

Keystone Affiliates [Member]

property

Eastchester Project [Member]

150 Main Street, L.L.C. [Member]

sqft

sqft

item

Eastchester Project [Member]

Real Estate Properties [Line Items]

Number of units

310

412

108

Business acquisition, cash paid

$61,300,000

$88,000,000

$4,900,000

Transaction costs

214,000

214,000

Percentage of interest in venture

26.25%

76.25%

7.50%

80.00%

Area of property (in square feet)

1,660,000

1,300,000

Number of land parcels sold

3

Third party ownership percentage

0.00%

26.25%

23.75%

47.50%

Total project costs

46,000,000

Maximum borrowing capacity

600,000,000

600,000,000

600,000,000

27,500,000

Amount of project costs funded by members

18,500,000

Parent ownership percentage

76.25%

Proceeds from the sale of property

332,540,000

4,023,000

201,000,000

Net sales proceeds

207,000,000

Sale price of property

233,000,000

Number of mortgage loans

1

New mortgage loan

10,000,000

Amount of mortgage funded

8,000,000

Capital balance

22,000,000

Amount held by intermediary for reinvestment

55,300,000

Closing costs

5,552,000

536,000

15,809,000

1,542,000

4,000,000

Mortgage loan, maturity period

10 years

2 years

Loan extension period

1 year

Spread over LIBOR

1.25%

6.00%

Initial internal rate of return

15.00%

Internal rate of return

10.00%

Number of impaired properties

5

9

Impairments

48,700,000

48,700,000

48,500,000

Mortgage loan

$752,344,000

$752,344,000

$757,495,000

$159,200,000

Capitalization rate

8.50%

Discount rate

10.00%

15.00%

Real_Estate_Transactions_Sched

Real Estate Transactions (Schedule Of Purchase Price Allocation) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Business Acquisition [Line Items]
Land	21,097,000
Buildings and improvements	122,080,000
Furniture, fixtures and equipment	2,275,000
In-place lease values	4,079,000
Total assets acquired	149,531,000
Less: Below market lease values	331,000
Total liabilities assumed	331,000
Net cash paid at acquisition	149,200,000
Alterra At Overlook Ridge IA [Member]
Business Acquisition [Line Items]
Land	9,042,000
Buildings and improvements	50,671,000
Furniture, fixtures and equipment	801,000
In-place lease values	931,000	[1]
Total assets acquired	61,445,000
Less: Below market lease values	195,000	[1]
Total liabilities assumed	195,000
Net cash paid at acquisition	61,250,000
Alterra At Overlook Ridge IB [Member]
Business Acquisition [Line Items]
Land	12,055,000
Buildings and improvements	71,409,000
Furniture, fixtures and equipment	1,474,000
In-place lease values	3,148,000	[1]
Total assets acquired	88,086,000
Less: Below market lease values	136,000	[1]
Total liabilities assumed	136,000
Net cash paid at acquisition	87,950,000
Maximum [Member]
Business Acquisition [Line Items]
In-place and below market lease value amortization period	1 year
[1]	In-place lease values and below market lease values will be amortized over one year or less.

Real_Estate_Transactions_Sched1

Real Estate Transactions (Schedule Of Consolidation Amounts) (Details) (USD $)	Sep. 30, 2013	Aug. 22, 2013
		Eastchester Project [Member]
Business Acquisition [Line Items]
Land	$21,097,000	$5,585,000
Construction in progress		3,387,000
Real estate recorded upon consolidation		8,972,000
Cash and cash equivalents		79,000
Other assets		47,000
Accounts payable		-325,000
Working capital recorded upon consolidation		-199,000
Noncontrolling interest recorded upon consolidation		-1,252,000
Net assets recorded upon consolidation		$7,521,000

Real_Estate_Transactions_Sched2

Real Estate Transactions (Schedule Of Properties Which Commenced Initial Operations) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
	sqft
	item
Real Estate Properties [Line Items]
Number of Buildings	2
Rentable Square Feet	220,242
Garage Parking Spaces	850
Development Costs Incurred by Company	$122,591
14 Sylvan Way [Member]
Real Estate Properties [Line Items]
Number of Buildings	1
Rentable Square Feet	203,506
Development Costs Incurred by Company	51,484	[1]
Development Costs Per Parking Space	253
Port Imperial South 4/5 [Member]
Real Estate Properties [Line Items]
Number of Buildings	1
Rentable Square Feet	16,736
Garage Parking Spaces	850
Development Costs Incurred by Company	71,107	[2]
Land [Member] | 14 Sylvan Way [Member]
Real Estate Properties [Line Items]
Development Costs Incurred by Company	13,000
Land [Member] | Port Imperial South 4/5 [Member]
Real Estate Properties [Line Items]
Development Costs Incurred by Company	13,100
Leases [Member] | 14 Sylvan Way [Member]
Real Estate Properties [Line Items]
Development Costs Incurred by Company	$4,300
[1]	Development costs included approximately $13.0 million in land costs and $4.3 million in leasing costs. Amounts are as of September 30, 2013.
[2]	Development costs included approximately $13.1 million in land costs. Amounts are as of September 30, 2013.

Real_Estate_Transactions_Sched3

Real Estate Transactions (Schedule Of Property Sales) (Details) (USD $)

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

0 Months Ended

6 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Aug. 27, 2013

Jun. 30, 2013

Sep. 30, 2013

item

19 Skyline Drive [Member]

19 Skyline Drive [Member]

55 Corporate Drive [Member]

200 Riser Road [Member]

777 Passaic Avenue [Member]

16 And 18 Sentry Park West [Member]

16 And 18 Sentry Park West [Member]

51 Imclone Drive [Member]

40 Richards Avenue [Member]

106 Allen Road [Member]

Pennsylvania Office Portfolio [Member]

Pennsylvania Office Portfolio [Member]

Pennsylvania Office Portfolio [Member]

sqft

sqft

sqft

sqft

item

sqft

item

sqft

item

property

sqft

property

item

item

item

sqft

item

sqft

item

sqft

item

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Number of Buildings

24

1

[1]

1

1

1

2

[2]

1

[3]

1

1

15

[4],[5]

Rentable Square Feet

3,006,409

248,400

[1]

204,057

286,628

75,000

188,103

[2]

63,213

[3]

145,487

132,010

1,663,511

[4],[5]

Net Sales Proceeds

$390,615,000

$16,131,000

[1]

$70,967,000

$31,775,000

$5,640,000

$19,041,000

[2]

$6,101,000

[3]

$15,858,000

$17,677,000

$207,425,000

[4],[5]

Net Book Value

305,685,000

16,005,000

[1]

51,308,000

14,852,000

3,713,000

19,721,000

[2]

5,278,000

[3]

17,027,000

13,522,000

164,259,000

[4],[5]

Realized Gain (loss)

84,930,000

126,000

[1]

19,659,000

16,923,000

1,927,000

-680,000

[2]

823,000

[3]

-1,169,000

4,155,000

43,166,000

[4],[5]

Valuation allowance

7,100,000

Note receivable

5,000,000

Note receivable, net present value

22,047,000

3,600,000

Mortgage loan, maturity period

10 years

2 years

Impairments

23,851,000

8,400,000

Loss from early extinguishment of debt

$703,000

Number of impaired properties

5

Number of land parcels sold

3

[1]

The Company recognized a valuation allowance of $7.1 million on this property at December 31, 2012. In connection with the sale, the Company provided an interest-free note receivable to the buyer of $5 million (with a net present value of $3.6 million at September 30, 2013) which matures in ten years and requires monthly payments of principal. See Note 5: Deferred charges, goodwill and other assets.

[2]

The Company recorded an $8.4 million impairment charge on these properties at December 31, 2012. The Company has retained a subordinated interest in these properties.

[3]

The property was encumbered by a mortgage loan which was satisfied by the Company at the time of the sale. The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations: loss from early extinguishment of debt for the nine months ended September 30, 2013.

[4]

In order to reduce the carrying value of five of the properties to their estimated fair market values, the Company recorded impairment charges of $23.9 million at June 30, 2013. The fair value used in the impairment charges was based on the purchase and sale agreement for the properties ultimately sold.

[5]

The portfolio sale also included three developable land parcels.

Investments_In_Unconsolidated_2

Investments In Unconsolidated Joint Ventures (Narrative) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
	property
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$131,859,000	$132,339,000
Accounts receivable from unconsolidated joint ventures	856,000	370,000
Number of VIEs	5
Maximum exposure to loss	13,700,000
Estimated future funding commitments	3,100,000
Unconsolidated Joint Venture Office Buildings [Member]
Schedule of Equity Method Investments [Line Items]
Number of properties	20
Unconsolidated Joint Venture Office And Retail Buildings [Member]
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)	2,300,000
Unconsolidated Joint Venture Retail Buildings [Member]
Schedule of Equity Method Investments [Line Items]
Number of properties	2
Unconsolidated Joint Venture Multi-Family Properties [Member]
Schedule of Equity Method Investments [Line Items]
Number of properties	7
Number of units	2,597
Unconsolidated Joint Venture Hotel [Member]
Schedule of Equity Method Investments [Line Items]
Number of units	350
Unconsolidated Joint Venture Commercial Property [Member]
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)	1,700,000
Unconsolidated Joint Venture Development Projects [Member]
Schedule of Equity Method Investments [Line Items]
Number of units	2,631
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture	7.50%
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture	80.00%
Variable Interest Entity [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$10,700,000
Apartments [Member] | Unconsolidated Joint Venture Land Parcels [Member]
Schedule of Equity Method Investments [Line Items]
Number of units	3,708
Office [Member] | Unconsolidated Joint Venture Land Parcels [Member]
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)	1,200,000

Investments_In_Unconsolidated_3

Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investments In Unconsolidated Joint Ventures [Abstract]
Rental property, net	$736,487	$180,254
Loan receivable	44,459	42,276
Other assets	434,714	311,847
Total assets	1,215,660	534,377
Mortgages and loans payable	600,473	168,908
Other liabilities	71,552	12,141
Partners'/members' capital	543,635	353,328
Total liabilities and partners'/members' capital	$1,215,660	$534,377

Investments_In_Unconsolidated_4

Investments In Unconsolidated Joint Ventures (Summary Of Company's Investment In Unconsolidated Joint Ventures) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	$131,859	$132,339
Plaza VIII & IX Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	4,065	4,321
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	-2,095	-1,225
Red Bank Corporate Plaza, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	3,972	3,876
12 Vreeland Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	5,439	12,840
Boston Downtown Crossing [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures		13,012
Gale Jefferson, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures		1,029
Stamford SM LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	35,667	34,006
Marbella RoseGarden, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	15,976	16,918
RoseGarden Monaco Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	3,524	4,761
Rosewood Lafayette Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	1,119	1,988
PruRose Port Imperial South 15, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures		606
Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	6,603	7,091
Overlook Ridge JV, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	178	31
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures		179
Roseland/North Retail, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	1,967	2,161
BNES Associates III [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	1,708	1,955
Portside Master Company, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	3,449	3,651
PruRose Port Imperial South 13, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	2,451	2,920
Roseland/Port Imperial Partners, L.P. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	2,755	2,582
RoseGarden Marbella South, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	7,160	6,182
PruRose Riverwalk G, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	3,515	4,136
Elmajo Urban Renewal Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	232	629
Estuary Urban Renewal Unit B, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	74	220
RiverPark At Harrison I, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	3,404	2,606
150 Main Street, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures		2,395
RoseGarden Monaco, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	1,208	1,165
Hillsborough 206 Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	1,989	1,967
Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	397	337
Crystal House Apartments Investors LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	26,928
Other [Member]
Schedule of Equity Method Investments [Line Items]
Company's investments in unconsolidated joint ventures	$174

Investments_In_Unconsolidated_5

Investments In Unconsolidated Joint Ventures (Summary Of Results Of Operations Of Unconsolidated Joint Ventures) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments In Unconsolidated Joint Ventures [Abstract]
Total revenues	$99,117	$17,311	$202,810	$44,369
Operating and other expenses	-48,621	-9,169	-137,889	-25,428
Depreciation and amortization	-11,556	-2,497	-24,730	-7,285
Interest expense	-3,934	-1,675	-9,256	-5,017
Net income	$35,006	$3,970	$30,935	$6,639

Investments_In_Unconsolidated_6

Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	($229)	$2,418	($2,059)	$4,751
Plaza VIII & IX Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	24	21	52	43
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	835	1,080	1,380	1,884
Red Bank Corporate Plaza, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	99	94	306	298
12 Vreeland Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-25	279	-1	603
Boston Downtown Crossing [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures		-6	646	-333
Gale Jefferson, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures		23	68	63
Stamford SM LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	1,023	927	2,805	2,193
Marbella RoseGarden, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-170		-446
RoseGarden Monaco Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-416		-1,238
Rosewood Lafayette Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-295		-869
PruRose Port Imperial South 15, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures			-606
Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-152		-393
Overlook Ridge JV 2C/3B, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	53		204
Roseland/North Retail, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-62		-194
BNES Associates III [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-37		-108
Portside Master Company, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-109		-222
PruRose Port Imperial South 13, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-181		-459
RoseGarden Marbella South, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-20		-57
PruRose Riverwalk G, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-198		-576
Elmajo Urban Renewal Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-87		-255
Estuary Urban Renewal Unit B, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-44		-107
Crystal House Apartments Investors LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	-1,149		-2,671
Other [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	$682		$682

Investments_In_Unconsolidated_7

Investments In Unconsolidated Joint Ventures (Plaza VIII And IX Associates, L.L.C.) (Narrative) (Details) (Plaza VIII & IX Associates, L.L.C. [Member])	Sep. 30, 2013
Plaza VIII & IX Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture	50.00%

Investments_In_Unconsolidated_8

Investments In Unconsolidated Joint Ventures (South Pier At Harborside - Hotel) (Narrative) (Details) (South Pier At Harborside [Member], USD $)	9 Months Ended
	Sep. 30, 2013
	item
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Number of hotel rooms	350
Percentage of interest in venture	50.00%
Mortgage loans, carrying amount	$63,100,000
Interest rate	6.15%
Mortgage loan, maturity date	Nov-16
Book value of Company's long-term debt	4,600,000
Bears interest at fixed rate range, minimum	6.09%
Bears interest at fixed rate range, maximum	6.62%
Loan maturity date	1-Aug-20
Letter of credit	$4,600,000

Investments_In_Unconsolidated_9

Investments In Unconsolidated Joint Ventures (Red Bank Corporate Plaza, L.L.C.) (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Jul. 15, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
		Red Bank Corporate Plaza, L.L.C. [Member]	Red Bank Corporate Plaza, L.L.C. [Member]	Red Bank Corporate Plaza, L.L.C. [Member]	Red Bank Corporate Plaza, L.L.C. [Member]
		sqft		sqft
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)		92,878		92,878
Lease expiration date				30-Sep-17
Percentage of interest in venture		50.00%		50.00%
Mortgage loans, carrying amount		$16,800,000		$16,800,000
Spread over LIBOR	1.25%			3.00%
Mortgage loan, maturity date				May-16
LIBOR interest rate		0.18%		0.18%
Percentage of loan that has a fixed interest rate		75.00%		75.00%
Fixed interest rate		3.99%		3.99%
Management, leasing and other services fees		$26,000	$25,000	$80,000	$75,000

Recovered_Sheet1

Investments In Unconsolidated Joint Ventures (12 Vreeland Associates, L.L.C.) (Narrative) (Details) (12 Vreeland Associates, L.L.C. [Member], USD $)	9 Months Ended
	Sep. 30, 2013
	sqft
12 Vreeland Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture	50.00%
Area of property (in square feet)	139,750
Mortgage loans, carrying amount	$15,800,000
Interest rate	2.87%
Mortgage loan, maturity date	Jul-23
Distribution of loan proceeds	14,800,000
Share of distribution of loan proceeds	$7,400,000

Recovered_Sheet2

Investments In Unconsolidated Joint Ventures (Boston-Downtown Crossing) (Narrative) (Details) (USD $)	0 Months Ended	9 Months Ended
	Apr. 23, 2013	Sep. 30, 2013
		sqft
Schedule of Equity Method Investments [Line Items]
Gain on sale of property		$84,930,000
Boston Downtown Crossing [Member]
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)		1,200,000
Percentage of interest in venture		15.00%
Venture sale of real estate	45,000,000
Share of gain on sale of real estate	13,500,000
Gain on sale of property		$754,000

Recovered_Sheet3

Investments In Unconsolidated Joint Ventures (Gale Jefferson, L.L.C.) (Narrative) (Details) (USD $)	0 Months Ended	9 Months Ended		0 Months Ended	3 Months Ended		9 Months Ended
	Jul. 15, 2013	Sep. 30, 2013	Sep. 30, 2013	Jan. 04, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
			One Jefferson [Member]	Gale Jefferson, L.L.C. [Member]	Gale Jefferson, L.L.C. [Member]	Gale Jefferson, L.L.C. [Member]	Gale Jefferson, L.L.C. [Member]	Gale Jefferson, L.L.C. [Member]
					sqft		sqft
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture			8.33%
Rentable Square Feet					100,010		100,010
Lease expiration date							1-Aug-25
Mortgage loans, carrying amount			$20,200,000
Spread over LIBOR	1.25%		1.60%
Mortgage loan, maturity date			Oct-13
Venture sale of real estate				3,200,000
Share of gain on sale of real estate				1,100,000
Gain on sale of property		84,930,000					69,000
Management, leasing and other services fees					$0	$48,000	$0	$144,000

Recovered_Sheet4

Investments In Unconsolidated Joint Ventures (Stamford SM LLC) (Narrative) (Details) (USD $)	0 Months Ended				9 Months Ended
	Jul. 15, 2013	Feb. 17, 2012	Feb. 17, 2012	Feb. 17, 2012	Sep. 30, 2013	Sep. 30, 2013	Feb. 17, 2012
		Class A Portfolio In Stamford, Connecticut [Member]	Class A Office Space [Member]	Residential Space [Member]	Stamford SM LLC [Member]	Mezz Loan [Member]	Mezz Loan [Member]
		sqft	property	item
			sqft	sqft
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)		1,700,000	1,670,000	70,500
Venture property acquisition cost		$40,000,000
Mortgage loan face amount							50,000,000
Number of properties			7
Number of rental units				106
Mortgage loan carrying amount						44,300,000
Threshold of which excess proceeds are paid to another party						$47,000,000
Spread over LIBOR	1.25%					3.25%
Mortgage loan scheduled to mature						1-Aug-14
Percentage of interest in venture					80.00%
Third party ownership percentage					20.00%
Holding and distribution pattern under operating agreement					The operating agreement of Stamford SM provides, among other things, for distributions of net available cash in accordance with its members' respective ownership percentages. The Company holds an 80 percent interest in the venture. The Company and the 20 percent member share equally in decision-making on all major decisions involving the operations of the venture.

Recovered_Sheet5

Investments In Unconsolidated Joint Ventures (Marbella RoseGarden, L.L.C.) (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Oct. 23, 2012	Sep. 30, 2013	Oct. 23, 2012
	PruRose/Marbella I, L.L.C. [Member]	PruRose/Marbella I, L.L.C. [Member]	Marbella RoseGarden, L.L.C. [Member]	Marbella RoseGarden, L.L.C. [Member]	Marbella RoseGarden, L.L.C. [Member]	Marbella RoseGarden's Interest In PruRose/Marbella I [Member]
				sqft	Prudential-Marbella Partnership [Member]
				item
Schedule of Equity Method Investments [Line Items]
Indirect residual ownership percentage				24.27%
Number of units				412
Number of stories				40
Area of property (in square feet)				369,607
Percentage of interest in venture				48.53%
Investment ownership percentage						50.00%
Percentage of operating return on capital		9.50%
Capital balance			$100,000		$7,600,000
Accumulated unpaid operating return			0
Mortgage loans, carrying amount	95,000,000	95,000,000
Interest rate	4.99%	4.99%
Mortgage loan, maturity date		May-18
Management, leasing and other services fees	$83,000	$262,000
Holding and distribution pattern under operating agreement		In general, the operating agreement of PruRose/Marbella provides that operating cash flows are distributed to members first to Prudential-Marbella and then to RoseGarden based on a 9.5 percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet6

Investments In Unconsolidated Joint Ventures (RoseGarden Monaco Holdings, L.L.C.) (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Oct. 23, 2012	Sep. 30, 2013	Oct. 23, 2012	Oct. 23, 2012
	PruRose Monaco Holdings, L.L.C. [Member]	PruRose Monaco Holdings, L.L.C. [Member]	RoseGarden Monaco Holdings, L.L.C. [Member]	RoseGarden Monaco Holdings, L.L.C. [Member]	RoseGarden Monaco Holdings' Interest In Monaco Holdings [Member]	Monaco Holdings' Interest In PruRose Monaco Holdings [Member]
			property	Prudential Insurance Company Of America [Member]
			sqft
			item
Schedule of Equity Method Investments [Line Items]
Indirect residual ownership percentage			15.00%
Number of real estate properties			2
Number of stories			50
Number of units			523
Area of property (in square feet)			477,254
Percentage of interest in venture			50.00%
Investment ownership percentage					60.00%	50.00%
Percentage of operating return on capital		9.00%
Capital balance				$76,000,000
Accumulated unpaid operating return				3,400,000
Mortgage loans, carrying amount	165,000,000	165,000,000
Interest rate	4.19%	4.19%
Mortgage loan, maturity date		Feb-21
Management, leasing and other services fees	$115,000	$350,000
Holding and distribution pattern under operating agreement		In general, the operating agreement of PruRose Monaco provides that operating cash flows are distributed to members first to Prudential and then to Monaco Holdings based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet7

Investments In Unconsolidated Joint Ventures (Rosewood Lafayette Holdings, L.L.C.) (Narrative) (Details) (USD $)	2 Months Ended	3 Months Ended		9 Months Ended
	Dec. 23, 2012	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Oct. 23, 2012	Oct. 23, 2012	Sep. 30, 2013
	Rosewood Lafayette Commons, L.L.C. [Member]	Rosewood Lafayette Commons, L.L.C. [Member]	Rosewood Lafayette Commons, L.L.C. [Member]	Rosewood Lafayette Commons, L.L.C. [Member]	Rosewood Lafayatte Holdings' Interest In Rosewood Lafayette Commons [Member]	Rosewood Lafayette Holdings, L.L.C. [Member]	Rosewood Lafayette Holdings, L.L.C. [Member]
						sqft	Prudential [Member]
						item
Schedule of Equity Method Investments [Line Items]
Indirect residual ownership percentage						25.00%
Number of units						217
Area of property (in square feet)						185,733
Percentage of interest in venture						50.00%
Investment ownership percentage					50.00%
Percentage of operating return on capital	8.00%		9.00%
Capital balance							$29,500,000
Accumulated unpaid operating return							2,100,000
Mortgage loans, carrying amount		39,500,000		39,500,000
Interest rate		4.00%		4.00%
Mortgage loan, maturity date				Jul-15
Amortization schedule				30 years
Management, leasing and other services fees		$48,000		$142,000
Holding and distribution pattern under operating agreement				In general, the operating agreement of Rosewood Lafayette provides that operating cash flows are distributed to members first to Prudential and then to Rosewood based on an eight percent operating return to December 23, 2012 and nine percent thereafter on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet8

Investments In Unconsolidated Joint Ventures (PruRose Port Imperial South 15, L.L.C) (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended
	Jul. 15, 2013	Sep. 30, 2013	Sep. 30, 2013	Oct. 23, 2012	Sep. 30, 2013	Sep. 30, 2013
		PruRose Port Imperial South 15, L.L.C. [Member]	PruRose Port Imperial South 15, L.L.C. [Member]	PruRose Port Imperial South 15, L.L.C. [Member]	PruRose Port Imperial South 15, L.L.C. [Member]	Refinance Loan [Member]
				item	Prudential-Port [Member]	PruRose Port Imperial South 15, L.L.C. [Member]
				sqft
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture				50.00%
Number of units				236
Area of property (in square feet)				214,402
Third party ownership percentage				50.00%
Percentage of operating return on capital			9.00%
Capital balance					$33,800,000
Accumulated unpaid operating return					5,100,000
Percent of distributions paid to third party after threshold reached			20.00%
Threshold of internal rate of return for distributions to third party			8.00%
Mortgage loans, carrying amount		57,000,000	57,000,000			57,500,000
Spread over LIBOR	1.25%		2.35%
Mortgage loan, maturity date			Aug-13			Sep-20
Interest rate						4.32%
Management, leasing and other services fees		$62,000	$185,000
Holding and distribution pattern under operating agreement			In general, the operating agreement of Port Imperial 15 provides that operating cash flows are distributed to members first to Prudential-Port and then to the Company based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet9

Investments In Unconsolidated Joint Ventures (Rosewood Morristown, L.L.C.) (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Oct. 23, 2012

Oct. 23, 2012

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Morristown Epsteins, L.L.C. [Member]

Morristown Epsteins, L.L.C. [Member]

Epsteins B Rentals, L.L.C. [Member]

Epsteins B Rentals, L.L.C. [Member]

Rosewood Morristown, L.L.C. [Member]

Rosewood Morristown, L.L.C. [Member]

Rosewood Morristown, L.L.C. [Member]

Rosewood Morristown's Interest In Morristown Epsteins [Member]

40 Park Condominium Property [Member]

40 Park Condominium Property [Member]

Lofts At 40 Park Property [Member]

Metropolitan Property [Member]

Metropolitan Property [Member]

The Shops At 40 Park Property [Member]

The Shops At 40 Park Property [Member]

The Shops At 40 Park Property [Member]

Prudential [Member]

Morristown Epsteins, L.L.C. [Member]

PR II/Morristown Prudential, L.L.C. [Member]

Morristown Epsteins, L.L.C. [Member]

Morristown Epsteins, L.L.C. [Member]

Morristown Epsteins, L.L.C. [Member]

Morristown Epsteins, L.L.C. [Member]

Morristown Epsteins, L.L.C. [Member]

Epsteins B Rentals, L.L.C. [Member]

item

item

sqft

sqft

item

Schedule of Equity Method Investments [Line Items]

Percentage of interest in venture

50.00%

Investment ownership percentage

50.00%

50.00%

Third party ownership percentage

50.00%

Number of units

76

91

130

Number of unsold units

3

Number of stories

7

Area of property (in square feet)

10,730

50,973

Interest rate

8.00%

3.25%

3.63%

Preferred rate of return

8.00%

Note payable

$975,000

Adjusted capital balance

3,200,000

Interest in net sales proceeds

15.00%

Percentage of operating return on capital

9.00%

Capital balance

700,000

19,100,000

Accumulated unpaid operating return

0

203,000

Mortgage loans, carrying amount

1,100,000

48,500,000

48,500,000

38,600,000

6,500,000

Spread over LIBOR

1.25%

2.50%

2.75%

Mortgage loan, maturity date

Sep-14

Sep-20

Aug-18

Additional borrowing capacity

1,000,000

Management, leasing and other services fees

$47,000

$134,000

Holding and distribution pattern under operating agreement

The operating agreement of Morristown provides, among other things, for the distribution of net available cash to the members, as follows:to pay accrued and unpaid interest at a rate of eight percent on the balance note, as defined;to Rosewood in an amount equal to its current year's annual preferred return rate of eight percent on its adjusted capital, as defined;to pay the outstanding balance remaining on the balance note, which was $975,000 as of September 30, 2013;to Rosewood in an amount equal to its adjusted capital balance, which was $3.2 million as of September 30, 2013; andto the members in accordance with their ownership percentages.

In general, the operating agreement of Epsteins provides that operating cash flows are distributed to members first to Prudential and then to Rosewood based on a nine percent return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet10

Investments In Unconsolidated Joint Ventures (Overlook Ridge JV, L.L.C.) (Narrative) (Details) (USD $)

0 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Oct. 23, 2012

Oct. 23, 2012

Oct. 23, 2012

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Lennar Massachusetts Properties [Member]

LR JV-C Associates, L.L.C. [Member]

LR JV-C Associates, L.L.C. [Member]

LR Overlook Phase III, L.L.C. [Member]

Overlook Ridge JV, L.L.C. [Member]

Overlook Ridge JV, L.L.C. [Member]

Overlook Ridge JV's Interest In LR JV-C Associates [Member]

Overlook Ridge JV's Interest In LR Overlook Phase III [Member]

Quarrystone I Property [Member]

Overlook Phase III [Member]

Letter of Credit [Member]

Senior Loans [Member]

Junior Loans [Member]

Overlook Ridge JV, L.L.C. [Member]

Overlook Ridge JV, L.L.C. [Member]

LR JV-C Associates, L.L.C. [Member]

LR JV-C Associates, L.L.C. [Member]

LR JV-C Associates, L.L.C. [Member]

item

sqft

Schedule of Equity Method Investments [Line Items]

Indirect residual ownership percentage

25.00%

Number of units

251

Investment ownership percentage

50.00%

100.00%

50.00%

Area of property (in square feet)

278,721

Percentage of interest in venture

50.00%

Priority partnership loan

$18,800,000

Accrued interest payable

23,472,000

27,555,000

14,400,000

Amount of unrecovered capital to determine cash flow distribution

0

Mortgage loans, carrying amount

69,900,000

69,900,000

5,600,000

52,900,000

17,000,000

Mortgage loan, maturity date

Mar-16

Apr-15

Spread over LIBOR

1.25%

2.50%

2.00%

0.90%

Borrowing capacity under the credit facility

600,000,000

600,000,000

17,000,000

Loan extension period

1 year

Extension fee

0.25%

Amount of debt guaranteed by company

1,500,000

Management, leasing and other services fees

$46,000

$137,000

Holding and distribution pattern under operating agreement

In general, the operating agreement of LR Overlook provides, among other things, for distributions of cash flow to the members in accordance with their ownership percentages, subject to the repayment of priority partnership loans.

The operating agreement of Overlook Ridge JV provides, among other things, for the distribution of distributable cash, as defined, to the members, as follows:First, to the members in proportion to their respective unrecovered capital percentages, as defined in the agreement, until each member's unrecovered capital has been reduced to zero; and Second, to the members in accordance with their ownership percentages.

Recovered_Sheet11

Investments In Unconsolidated Joint Ventures (Overlook Ridge, L.L.C.) (Narrative) (Details) (USD $)	0 Months Ended	9 Months Ended				9 Months Ended
	Jul. 15, 2013	Sep. 30, 2013	Oct. 23, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
		Overlook Ridge, L.L.C. [Member]	Overlook Ridge, L.L.C. [Member]	Overlook Ridge, L.L.C. [Member]	Maximum [Member]	Maximum [Member]
				Rowe [Member]		Overlook Ridge, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture			50.00%		80.00%
Percentage of operating return on capital						6.00%
Notional land capital		$20,000,000
Percentage of notional land capital account assigned		3.00%		97.00%
Mortgage loan		17,400,000
Mortgage loans, carrying amount		$16,500,000
Spread over LIBOR	1.25%	3.50%
Mortgage loan, maturity date		Mar-14
Loan extension period		1 year
Extension fee		0.25%
Holding and distribution pattern under operating agreement		The operating agreement of Overlook Ridge provides, among other things, for the distribution of net cash flow to the members, as follows:First, to the members in proportion to their unrecovered capital percentages, as defined, until the cumulative amounts distributed equal such member's return of six percent on the unrecovered capital; andSecond, to the members in accordance with their ownership percentages.

Recovered_Sheet12

Investments In Unconsolidated Joint Ventures (Overlook Ridge JV 2C/3B, L.L.C.) (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 18, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

item

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge Apartments Member L.L.C. [Member]

Overlook Ridge JV 2C/3B, L.L.C. [Member]

Overlook Ridge JV 2C/3B, L.L.C. [Member]

Overlook Ridge JV 2C/3B, L.L.C. [Member]

Overlook Ridge JV 2C/3B, L.L.C. [Member]

Overlook Ridge 2C 3B's Interest In Overlook Ridge Apartments Investors [Member]

Overlook 2C 3B Project [Member]

Overlook 2C 3B Project [Member]

Overlook 2C 3B Project [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 2 [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Overlook Ridge Apartments Member L.L.C. [Member]

Rowe [Member]

Parent Company [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge JV 2C/3B, L.L.C. [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook 2C 3B Project [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Construction Loan [Member]

Construction Loan [Member]

property

item

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

Overlook Ridge Apartments Investors, L.L.C. [Member]

item

Schedule of Equity Method Investments [Line Items]

Indirect residual ownership percentage

25.00%

Number of units

371

Number of real estate properties

4

Percentage of interest in venture

50.00%

7.50%

80.00%

Investment ownership percentage

50.00%

Total project costs

$79,400,000

$23,900,000

Maximum borrowing capacity

600,000,000

600,000,000

55,500,000

55,500,000

Amount outstanding

5,200,000

Percentage of operating return on capital

6.50%

Capital balance

23,900,000

7,200,000

Accumulated unpaid operating return

1,100,000

Percentage of capital event cash flows distributed

100.00%

Initial internal rate of return

9.00%

Percentage of capital event cash flows distributed after initial internal rate of return reached

70.00%

30.00%

Internal rate of return

11.00%

Spread over LIBOR

1.25%

2.50%

Loan maturity date

1-Dec-15

Number of extension options

2

2

Loan extension period

1 year

Extension fee

0.25%

0.25%

Amount of debt guaranteed by company

8,300,000

Threshold of payment guarantee termination, debt service coverage ratio

1.25

Percentage of loan that has a fixed interest rate

95.00%

Interest rate

3.09%

Percentage return on unrecovered capital

9.00%

Unrecovered notional capital

200,000

Development management and other services fees

$209,000

$387,000

Holding and distribution pattern under operating agreement

In general, the operating agreement of Overlook Apartments Investors provides that operating cash flows are distributed to members first to Overlook Apartments Member and then to Overlook 2C/3B based on a 6.5 percent preferred return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet13

Investments In Unconsolidated Joint Ventures (Roseland/North Retail, L.L.C.) (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Oct. 23, 2012
Port Imperial North Retail, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Residual ownership interest			20.00%
Percentage of operating return on capital		9.00%
Management, leasing and other services fees	$8,000	$23,000
Holding and distribution pattern under operating agreement		In general, the operating agreement of PI North Retail provides that operating cash flows are distributed first to Prudential-PI and then to the Company based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with ownership percentages.
Roseland/North Retail, L.L.C. [Member] | PR II Port Imperial Retail, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Capital balance	4,300,000	4,300,000
Accumulated unpaid operating return	1,600,000	1,600,000
Roseland/North Retail, L.L.C. [Member] | Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Capital balance	$0	$0
Riverwalk Property [Member]
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet)			30,745

Recovered_Sheet14

Investments In Unconsolidated Joint Ventures (BNES Associates III) (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Oct. 23, 2012	Oct. 23, 2012
	The Offices At Crystal Lake, L.L.C. [Member]	BNES Associates III's Interest In The Offices At Crystal Lake [Member]	BNES Associates III [Member]
			sqft
Schedule of Equity Method Investments [Line Items]
Indirect residual ownership percentage			31.25%
Area of property (in square feet)			106,345
Percentage of interest in venture			50.00%
Investment ownership percentage		62.50%
Mortgage loans, carrying amount	$7,500,000
Interest rate	4.76%
Mortgage loan, maturity date	Nov-23

Recovered_Sheet15

Investments In Unconsolidated Joint Ventures (Portside Master Company, L.L.C.) (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

item

PR II Portside Investors, L.L.C. [Member]

Portside Apartment Holdings, L.L.C. [Member]

Portside Apartment Holdings, L.L.C. [Member]

Portside Master Company, L.L.C. [Member]

Portside Master Company, L.L.C. [Member]

Portside Master Company's Interest In Portside Apartment Holdings [Member]

Construction Loan [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 2 [Member]

Portside At Pier One Building Seven Property [Member]

Portside At Pier One Building Seven Property [Member]

Portside At Pier One Building Seven Property [Member]

Portside At Pier One Building Seven Property [Member]

Minimum [Member]

Portside Master Company, L.L.C. [Member]

Portside Apartment Holdings, L.L.C. [Member]

Portside Apartment Holdings, L.L.C. [Member]

Portside Apartment Holdings, L.L.C. [Member]

item

PR II Portside Investors, L.L.C. [Member]

Construction Loan [Member]

Construction Loan [Member]

PR II Portside Investors, L.L.C. [Member]

item

Portside Apartment Holdings, L.L.C. [Member]

Portside Apartment Holdings, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

Indirect residual ownership percentage

38.25%

Number of units

176

Investment ownership percentage

85.00%

45.00%

Total project costs

$66,300,000

$23,800,000

Maximum borrowing capacity

600,000,000

600,000,000

42,500,000

42,500,000

Amount outstanding

0

Percentage of operating return on capital

9.00%

Capital balance

16,800,000

Accumulated unpaid operating return

600,000

Percentage of capital event cash flows distributed

65.00%

35.00%

Internal rate of return

12.00%

Spread over LIBOR

1.25%

2.50%

Loan maturity date

1-Dec-15

Number of extension options

2

2

Loan extension period

1 year

Extension fee

0.13%

0.25%

Percentage of debt guaranteed by the company

50.00%

Percentage of debt guaranteed by the company after project completion

25.00%

Percentage of debt guaranteed by the company after debt service coverage ratio threshold reached

10.00%

Threshold of payment guarantee termination, debt service coverage ratio

1.25

Development management and other services fees

$149,000

$360,000

Holding and distribution pattern under operating agreement

In general, the operating agreement of Portside Apartment Holdings provides that operating cash flows are distributed to members first to Prudential Portside and then to Portside Master based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet16

Investments In Unconsolidated Joint Ventures (PruRose Port Imperial South 13, LLC) (Narrative) (Details) (USD $)

0 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jan. 01, 2016

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

Port Imperial 13 [Member]

Port Imperial 13 [Member]

Port Imperial 13 [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 2 [Member]

Land [Member]

Land [Member]

Land [Member]

1.25 [Member]

1.40 [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Scenario, Forecast [Member]

PR II Port Imperial South 13 Investor, L.L.C. [Member]

Parent Company [Member]

item

PR II Port Imperial South 13 Investor, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

Port Imperial 13 [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PR II Port Imperial South 13 Investor, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

Parent Company [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

PruRose Port Imperial South 13, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

Percentage of interest in venture

20.00%

7.50%

80.00%

Number of units

280

Total project costs

$96,400,000

$23,100,000

Contributed capital

21,000,000

19,200,000

1,800,000

Maximum borrowing capacity

600,000,000

600,000,000

73,400,000

73,400,000

Amount outstanding

0

Percentage of operating return on capital

9.00%

Capital balance

40,500,000

1,800,000

Accumulated unpaid operating return

2,700,000

100,000

Percent of distributions paid to third party after threshold reached

20.00%

Threshold of internal rate of return for distributions to third party

8.00%

Spread over LIBOR

1.25%

2.15%

Loan maturity date

1-Jun-16

Loan extension period

1 year

6 months

Extension fee

0.25%

0.25%

Amount of debt guaranteed by company

11,000,000

Amount of debt guaranteed by the company after debt service coverage ratio threshold reached

7,400,000

0

Threshold of payment guarantee reduction, debt service coverage ratio

1.25

Threshold of payment guarantee termination, debt service coverage ratio

1.4

Percentage of loan that has a fixed interest rate

95.00%

Interest rate

2.79%

Development management and other services fees

$212,000

$537,000

Holding and distribution pattern under operating agreement

In general, the operating agreement of PruRose 13 provides that operating cash flows are distributed to members first to Prudential 13 and then to the Company based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet17

Investments In Unconsolidated Joint Ventures (Roseland/Port Imperial Partners, L.P.) (Narrative) (Details) (Roseland/Port Imperial Partners, L.P. [Member], USD $)	9 Months Ended
	Sep. 30, 2013	Oct. 23, 2012
		item
Schedule of Equity Method Investments [Line Items]
Residual ownership interest		20.00%
Number of units		363
Percentage of operating return on capital	10.00%
Percentage of return on additional capital contribution	10.00%
Holding and distribution pattern under operating agreement	The operating agreement of Roseland/PI provides, among other things, for the distribution of net cash flow to the members, as follows:to Prudential and Prudential LLC, in proportion to the excess of their operating return of ten percent on Prudential's Parcel C contribution, as defined, accrued to the date of such distribution over the aggregate amounts previously distributed to such partner for such return; to the partners, to the extent of any excess of such partner's operating return of ten percent on its additional capital contributions over the aggregate amounts previously distributed for such return; andto the partners in accordance with their percentage interests.
Prudential [Member]
Schedule of Equity Method Investments [Line Items]
Third party ownership percentage		79.00%
Prudential-Port Imperial, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Third party ownership percentage		1.00%
Prudential And Prudential-Port Imperial, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Accumulated unpaid operating return	23,000
Capital balance	584,000
Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Accumulated unpaid operating return	6,000
Capital balance	146,000
Land [Member] | Prudential And Prudential-Port Imperial, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Capital balance	57,700,000
Land [Member] | Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Capital balance	5,000,000
Parcel C [Member] | Prudential And Prudential-Port Imperial, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Accumulated unpaid operating return	3,800,000
Capital balance	18,200,000
Parcel C [Member] | Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Capital balance	26,000

Recovered_Sheet18

Investments In Unconsolidated Joint Ventures (RoseGarden Marbella South, L.L.C.) (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

0 Months Ended

0 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 01, 2013

Sep. 30, 2013

Oct. 01, 2013

Sep. 30, 2013

item

PruRose Marbella II, L.L.C. [Member]

PruRose Marbella II, L.L.C. [Member]

RoseGarden Marbella South, L.L.C. [Member]

RoseGarden Marbella South, L.L.C. [Member]

RoseGarden Marbella South, L.L.C. [Member]

RoseGarden Marbella South's Interest In PruRose Marbella II [Member]

Marbella II Project [Member]

Marbella II Project [Member]

Marbella II Project [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 2 [Member]

item

PruRose Marbella II, L.L.C. [Member]

PRISA III Investments LLC [Member]

Parent Company [Member]

PruRose Marbella II, L.L.C. [Member]

Marbella II Project [Member]

PruRose Marbella II, L.L.C. [Member]

PruRose Marbella II, L.L.C. [Member]

item

RoseGarden Marbella South, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

Indirect residual ownership percentage

24.27%

Number of units

311

Percentage of interest in venture

48.53%

Investment ownership percentage

50.00%

Total project costs

$132,100,000

$41,400,000

$13,300,000

Estimated project costs to be funded by member capital

54,700,000

Maximum borrowing capacity

600,000,000

600,000,000

77,400,000

77,400,000

Percentage of operating return on capital

9.00%

Capital balance

1,700,000

3,400,000

Accumulated unpaid operating return

39,000

300,000

Spread over LIBOR

1.25%

2.25%

Number of extension options

2

2

Mortgage loan, maturity date

1-Apr-17

Loan extension period

1 year

Extension fee

0.25%

0.25%

Development management and other services fees

$195,000

$213,000

Holding and distribution pattern under operating agreement

In general, the operating agreement of PruRose/Marbella II provides that operating cash flows are distributed to members pro-rata based on a nine percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet19

Investments In Unconsolidated Joint Ventures (PruRose Riverwalk G, L.L.C.) (Narrative) (Details) (USD $)

Sep. 30, 2013

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

West New York Parcel G Apartments Investors, L.L.C. [Member]

Riverwalk G Urban Renewal, L.L.C. [Member]

Riverwalk G Urban Renewal, L.L.C. [Member]

Prudential [Member]

PruRose Riverwalk G, L.L.C. [Member]

PruRose Riverwalk G, L.L.C. [Member]

PruRose Riverwalk G, L.L.C. [Member]

PruRose Riverwalk G's Interest In Riverwalk G Urban Renewal [Member]

Construction Loan [Member]

Construction Loan [Member]

RiverTrace Project [Member]

item

West New York Parcel G Apartments Investors, L.L.C. [Member]

West New York Parcel G Apartments Investors, L.L.C. [Member]

Riverwalk G Urban Renewal, L.L.C. [Member]

West New York Parcel G Apartments Investors, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

Indirect residual ownership percentage

25.00%

Number of stories

12

Number of units

316

Percentage of interest in venture

50.00%

Investment ownership percentage

50.00%

Total project costs

$118,100,000

$35,000,000

Maximum borrowing capacity

600,000,000

600,000,000

83,100,000

83,100,000

Percentage of operating return on capital

7.75%

Capital balance

35,000,000

Accumulated unpaid operating return

6,000,000

Percentage of capital event cash flows distributed

100.00%

Internal rate of return

7.75%

Amount of company's initial distributions to be redirected

1,300,000

Amount outstanding

54,600,000

Interest rate

6.00%

Loan maturity date

1-Jul-21

Period of loan guarantee by company following completion of project

6 months

Development management and other services fees

$30,000

$379,000

Holding and distribution pattern under operating agreement

In general, the operating agreement of Riverwalk G provides that operating cash flows are distributed to members first to Investor and then to PruRose Riverwalk based on a 7.75 percent operating return on each members' capital balance in priorities as detailed in the operating agreement. Excess operating cash flows are distributed to the members in accordance with their ownership percentages.

Recovered_Sheet20

Investments In Unconsolidated Joint Ventures (ELMAJO Urban Renewal Associates, L.L.C./Estuary Urban Renewal Unit B, LLC) (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Oct. 23, 2012

Jan. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Elmajo Urban Renewal Associates, L.L.C. [Member]

Elmajo Urban Renewal Associates, L.L.C. [Member]

Elmajo Urban Renewal Associates, LLC And Estuary Urban Renewal Associates, LLC [Member]

Elmajo Urban Renewal Associates, LLC And Estuary Urban Renewal Associates, LLC [Member]

Elmajo Urban Renewal Associates, LLC And Estuary Urban Renewal Associates, LLC [Member]

Lincoln Harbor Project, Building A [Member]

Lincoln Harbor Project, Building C [Member]

Lincoln Harbor Project, Building B [Member]

Lincoln Harbor Project [Member]

Lincoln Harbor Project [Member]

Construction Loan [Member]

Construction Loan [Member]

property

ELMAJO Management, Inc. And Estuary Urban Renewal Unit B, LLC [Member]

Elmajo Urban Renewal Associates, L.L.C. [Member]

Elmajo Urban Renewal Associates, L.L.C. [Member]

item

Elmajo Urban Renewal Associates, L.L.C. [Member]

Lincoln Harbor Project, Building B [Member]

Lincoln Harbor Project Buildings A And C [Member]

item

item

item

Estuary Urban Renewal Unit B, LLC [Member]

ELMAJO Management, Inc. [Member]

Schedule of Equity Method Investments [Line Items]

Residual ownership interest

7.50%

Number of properties

3

Number of units

582

181

174

227

Total project costs

$218,300,000

Percentage return on unrecovered capital

8.50%

Capital balance

73,900,000

Accumulated unpaid operating return

13,500,000

Maximum borrowing capacity

600,000,000

600,000,000

57,000,000

95,000,000

Amount outstanding

4,100,000

40,200,000

Spread over LIBOR

1.25%

2.10%

2.10%

Loan maturity date

1-Jan-17

1-Jun-16

Loan extension period

1 year

1 year

Extension fee

0.25%

0.25%

Development management and other services fees

255,000

735,000

Funding requirements

$0

Holding and distribution pattern under operating agreement

The operating agreements of ELMAJO Urban Renewal Associates, LLC ("ELMAJO UR"), the entity which owns the Lincoln Harbor Project, Building A and C, and Estuary UR, the entity that owns the Lincoln Harbor Project Building B, provides, among other things, for the distribution of net distributable cash to the members, as follows:First, to the members to the extent of and in proportion to their respective preferred return of 8.50 percent on the member's unrecovered capital; andSecond, to the members in accordance with their ownership percentages.

Recovered_Sheet21

Investments In Unconsolidated Joint Ventures (RiverPark At Harrison I, L.L.C.) (Narrative) (Details) (USD $)

0 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

Jul. 15, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

item

RiverPark At Harrison I, L.L.C. [Member]

RiverPark At Harrison I, L.L.C. [Member]

RiverPark At Harrison I, L.L.C. [Member]

RiverPark At Harrison I, L.L.C. [Member]

Riverpark Project [Member]

Riverpark Project [Member]

Riverpark Project [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 2 [Member]

Chall Enterprises, L.L.C. [Member]

Investor Group [Member]

RiverPark At Harrison I, L.L.C. [Member]

RiverPark At Harrison I, L.L.C. [Member]

RiverPark At Harrison I, L.L.C. [Member]

Riverpark Project [Member]

RiverPark At Harrison I, L.L.C. [Member]

RiverPark At Harrison I, L.L.C. [Member]

item

item

RiverPark At Harrison I, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

Percentage of interest in venture

36.00%

Number of units

141

Total project costs

$28,200,000

Percentage of capital required to fund project

40.50%

Third party ownership percentage

36.00%

28.00%

Maximum borrowing capacity

600,000,000

600,000,000

23,400,000

23,400,000

Amount outstanding

$900,000

Spread over LIBOR

1.25%

2.35%

Loan maturity date

1-Jun-16

Number of extension options

2

2

Loan extension period

1 year

Extension fee

0.20%

0.20%

Percentage of debt guaranteed by the company

25.00%

Percentage of debt guaranteed by company after project completion and achievement of financial ratios

10.00%

Threshold of payment guarantee, debt service coverage ratio

1.3

Threshold of payment guarantee, loan-to-value ratio

65.00%

Holding and distribution pattern under operating agreement

In general, the operating agreement of RiverPark provides, among other things, for the distribution of net cash flow to the members in accordance with their ownership percentages.

Recovered_Sheet22

Investments In Unconsolidated Joint Ventures (150 Main Street, L.L.C.) (Narrative) (Details) (USD $)

Sep. 30, 2013

Jul. 15, 2013

Oct. 23, 2012

Aug. 22, 2013

Oct. 23, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Oct. 23, 2012

Sep. 30, 2013

Aug. 22, 2013

Oct. 23, 2012

Sep. 30, 2013

JMP Eastchester, L.L.C. [Member]

Hudson Valley Land Holdings, L.L.C. [Member]

Hudson Valley Land Holdings, L.L.C. [Member]

150 Main Street, L.L.C. [Member]

150 Main Street, L.L.C. [Member]

150 Main Street, L.L.C. [Member]

Eastchester Project [Member]

Eastchester Project [Member]

Eastchester Project [Member]

Eastchester Project [Member]

Construction Loan [Member]

Hudson Valley Land Holdings, L.L.C. [Member]

150 Main Street, L.L.C. [Member]

Eastchester Project [Member]

item

150 Main Street, L.L.C. [Member]

Schedule of Equity Method Investments [Line Items]

Percentage of interest in venture

26.25%

76.25%

Number of units

108

Business acquisition, cash paid

$4,900,000

Third party ownership percentage

26.25%

23.75%

47.50%

Total project costs

46,000,000

Maximum borrowing capacity

600,000,000

600,000,000

27,500,000

Amount of project costs funded by members

18,500,000

Preferred rate of return

8.00%

8.00%

Development management and other services fees

$87,000

$102,000

Holding and distribution pattern under operating agreement

The operating agreement of Eastchester provides, among other things, for the distribution of net operating cash flow to the members, as follows:to HVLH to the extent of its accrued but unpaid preferred return of eight percent on the unrecovered allocated land value, as defined; to the members, pro rata, to the extent of their respective accrued but unpaid return of eight percent on their unrecovered capital percentages; andto the members in accordance with their ownership percentages.

Recovered_Sheet23

Investments In Unconsolidated Joint Ventures (RoseGarden Monaco, L.L.C.) (Narrative) (Details) (RoseGarden Monaco, L.L.C. [Member])	9 Months Ended
	Sep. 30, 2013	Oct. 23, 2012
RoseGarden Monaco, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture		41.67%
Holding and distribution pattern under operating agreement	The operating agreement requires capital contributions and distributions in accordance with their ownership percentages.

Recovered_Sheet24

Investments In Unconsolidated Joint Ventures (Hillsborough 206 Holdings, L.L.C.) (Narrative) (Details) (Hillsborough 206 Holdings, L.L.C. [Member])	9 Months Ended
	Sep. 30, 2013	Oct. 23, 2012
Hillsborough 206 Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture		50.00%
Holding and distribution pattern under operating agreement	The operating agreement of Hillsborough 206 provides, among other things, for the distribution of distributable cash to the members, in accordance with their ownership percentages.

Recovered_Sheet25

Investments In Unconsolidated Joint Ventures (Grand Jersey Waterfront Urban Renewal Associates, L.L.C.) (Narrative) (Details) (Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member])	Oct. 23, 2012
Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in venture	50.00%

Recovered_Sheet26

Investments In Unconsolidated Joint Ventures (Crystal House Apartments Investors LLC) (Narrative) (Details) (Crystal House Apartments Investors LLC [Member], USD $)	0 Months Ended	3 Months Ended	9 Months Ended
	Mar. 20, 2013	Sep. 30, 2013	Sep. 30, 2013
	item
Schedule of Equity Method Investments [Line Items]
Number of units	828
Venture property acquisition cost	$262,500,000
Number of units available for development	295
Number of approved units available for development	252
Percentage of interest in venture	25.00%
Internal rate of return			9.00%
Mortgage loans, carrying amount		165,000,000	165,000,000
Interest rate		3.17%	3.17%
Mortgage loan, maturity date			Mar-20
Initial term of interest only payments			5 years
Amortization schedule			30 years
Percentage of interest in developable land	50.00%
Management, leasing and other services fees		$109,000	$228,000
Holding and distribution pattern under operating agreement			In general, the operating agreement of CHAI provides that net operating cash flows are distributed to the members in accordance with ownership percentages. Net cash flows from a capital event are distributed first to the members in accordance with ownership percentages until they receive a nine percent IRR, as defined, with any excess distributed 50 percent to the Company and 50 percent to UBS.
Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of capital event cash flows distributed			50.00%
UBS Global Asset Management [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of capital event cash flows distributed			50.00%

Deferred_Charges_Goodwill_And_2

Deferred Charges, Goodwill And Other Assets (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred Charges, Goodwill And Other Assets [Abstract]
Deferred leasing costs	$253,654	$267,197
Deferred financing costs	25,396	20,447
Deferred charges, gross	279,050	287,644
Accumulated amortization	-124,437	-131,613
Deferred charges, net	154,613	156,031
Notes receivable	22,047
In-place lease values, related intangible and other assets, net	13,501	19,284
Goodwill	2,945	2,945
Prepaid expenses and other assets, net	91,293	26,614
Total deferred charges, goodwill and other assets	$284,399	$204,874

Restricted_Cash_Details

Restricted Cash (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Restricted Cash [Abstract]
Security deposits	$7,780	$7,165
Escrow and other reserve funds	11,433	12,174
Total restricted cash	$19,213	$19,339

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
	item	New Jersey [Member]
	sqft	item
	property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold	24	3
Number of land parcels sold	3
Area of property sold	3,006,409
Sales proceeds	$390,615

Discontinued_Operations_Summar

Discontinued Operations (Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operations [Abstract]
Total revenues	$6,405	$17,376	$33,610	$51,790
Operating and other expenses	-2,472	-6,606	-13,454	-20,308
Depreciation and amortization	-1,769	-4,351	-8,196	-13,363
Interest expense (net of interest income)		-82	-118	-673
Income from discontinued operations	2,164	6,337	11,842	17,446
Loss from early extinguishment of debt			-703
Impairments			-23,851
Unrealized losses on disposition of rental property				-2,134
Realized gains (losses) on disposition of rental property, net	47,321	12	84,930	4,524
Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net	47,321	12	61,079	2,390
Total discontinued operations, net	$49,485	$6,349	$72,218	$19,836

Senior_Unsecured_Notes_Narrati

Senior Unsecured Notes (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument [Line Items]
Proceeds from the sale of senior unsecured notes	$268,928,000	$299,403,000
3.150% Senior Unsecured Note, Due May 15, 2023 [Member]
Debt Instrument [Line Items]
Face amount of senior unsecured notes	275,000,000
Interest rate of senior unsecured notes	3.15%
Maturity date of the senior unsecured notes	15-May-23
Proceeds from the sale of senior unsecured notes	$266,500,000

Senior_Unsecured_Notes_Summary

Senior Unsecured Notes (Summary Of Senior Unsecured Notes) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Senior Unsecured Notes	$1,616,337		$1,446,894
4.600% Senior Unsecured Notes, Due June 15, 2013 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes			99,987	[1]
Effective Rate	4.74%	[1],[2]
Interest rate of senior unsecured notes	4.60%	[1]
Maturity date of the senior unsecured notes	15-Jun-13	[1]
5.125% Senior Unsecured Notes, Due February 15, 2014 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	200,090		200,270
Effective Rate	5.11%	[2]
Interest rate of senior unsecured notes	5.13%
Maturity date of the senior unsecured notes	15-Feb-14
5.125% Senior Unsecured Notes, Due January 15, 2015 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	149,879		149,810
Effective Rate	5.30%	[2]
Interest rate of senior unsecured notes	5.13%
Maturity date of the senior unsecured notes	15-Jan-15
5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	200,180		200,237
Effective Rate	5.81%	[2]
Interest rate of senior unsecured notes	5.80%
Maturity date of the senior unsecured notes	15-Jan-16
2.500% Senior Unsecured Notes Due December 15, 2017 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	248,781		248,560
Effective Rate	2.80%	[2]
Interest rate of senior unsecured notes	2.50%
Maturity date of the senior unsecured notes	15-Dec-17
7.750% Senior Unsecured Notes, Due August 15, 2019 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	248,746		248,585
Effective Rate	8.02%	[2]
Interest rate of senior unsecured notes	7.75%
Maturity date of the senior unsecured notes	15-Aug-19
4.500% Senior Unsecured Notes Due April 18, 2022 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	299,490		299,445
Effective Rate	4.61%	[2]
Interest rate of senior unsecured notes	4.50%
Maturity date of the senior unsecured notes	18-Apr-22
3.150% Senior Unsecured Note, Due May 15, 2023 [Member]
Debt Instrument [Line Items]
Senior Unsecured Notes	$269,171
Effective Rate	3.52%	[2]
Interest rate of senior unsecured notes	3.15%
Maturity date of the senior unsecured notes	15-May-23
[1]	These notes were paid at maturity using available cash.
[2]	Includes the cost of terminated treasury lock agreements (if any), offering and other transaction costs and the discount/premium on the notes, as applicable.

Unsecured_Revolving_Credit_Fac2

Unsecured Revolving Credit Facility (Narrative) (Details) (USD $)	0 Months Ended	9 Months Ended			9 Months Ended
	Jul. 15, 2013	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
		item	Money Market Loan [Member]	Money Market Loan [Member]	Maximum [Member]
		entity			Money Market Loan [Member]
Line of Credit Facility [Line Items]
Number of lending institutions		17
Borrowing capacity under the credit facility	$600,000,000	$600,000,000	$75,000,000
Expandable borrowing capacity under the credit facility		1,000,000,000
Credit facility maturity date		1-Jul-17
Number of extension options		2
Credit facility, extension period		6 months
Credit facility extension fee, basis points	0.25%	0.08%
Line of credit facility, bid feature, current borrowing capacity		300,000,000
Terms of the unsecured facility		The terms of the unsecured facility include certain restrictions and covenants which limit, among other things the incurrence of additional indebtedness, the incurrence of liens and the disposition of real estate properties (to the extent that: (i) such property dispositions cause the Company to default on any of the financial ratios of the facility described below, or (ii) the property dispositions are completed while the Company is under an event of default under the facility, unless, under certain circumstances, such disposition is being carried out to cure such default), and which require compliance with financial ratios relating to the maximum leverage ratio, the maximum amount of secured indebtedness, the minimum amount of fixed charge coverage, the maximum amount of unsecured indebtedness, the minimum amount of unencumbered property interest coverage and certain investment limitations.
Terms of dividend restriction		If an event of default has occurred and is continuing, the Company will not make any excess distributions except to enable the Company to continue to qualify as a REIT under the Code.
Outstanding borrowings under the facility			$0	$0
Spread over LIBOR	1.25%
Maturity period of the unsecured borrowing					30 days

Unsecured_Revolving_Credit_Fac3

Unsecured Revolving Credit Facility (Change In The Operating Partnership's Unsecured Debt Ratings) (Details)	0 Months Ended	9 Months Ended
	Jul. 15, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
		No Ratings Or Less Than BBB-/Baa3 [Member]	BBB- Or Baa3 [Member]	BBB Or Baa2 (Current) [Member]	BBB+ Or Baa1 [Member]	A- Or A3 Or Higher [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings		No ratings or less than BBB-/Baa3	BBB- or Baa3	BBB or Baa2(current)	BBB+ or Baa1	A- or A3 or higher
Interest Rate - Applicable Basis Points Above LIBOR	1.25%	1.70%	1.30%	1.10%	1.00%	0.93%
Facility Fee Basis Points		0.35%	0.30%	0.20%	0.15%	0.13%

Mortgages_Loans_Payable_And_Ot2

Mortgages, Loans Payable And Other Obligations (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	property
Debt Instrument [Line Items]
Number of properties with encumbered company mortgages	30
Book value of encumbered properties	$989,000,000
Cash paid for interest	97,284,000	98,191,000
Interest capitalized	10,262,000	1,427,000
Total indebtedness	2,368,681,000		2,204,389,000
Total indebtedness, weighted average interest rate	5.62%		5.86%
Revolving Credit Facility Borrowings And Other Variable Rate Mortgage Debt [Member]
Debt Instrument [Line Items]
Total indebtedness	79,400,000		77,057,000
Total indebtedness, weighted average interest rate	2.74%		3.32%
Fixed Rate Debt And Other Obligations [Member]
Debt Instrument [Line Items]
Total indebtedness	$2,289,281,000		$2,127,332,000
Total indebtedness, weighted average interest rate	5.72%		5.95%

Mortgages_Loans_Payable_And_Ot3

Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details) (USD $)	0 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Jul. 15, 2013	Sep. 30, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Spread over LIBOR	1.25%
Mortgages, loans payable and other obligations		$752,344		$757,495
Loss from early extinguishment of debt		703
51 Imclone [Member]
Debt Instrument [Line Items]
Property Name		51 Imclone (b)	[1]
Lender		Wells Fargo CMBS	[1]
Effective Rate		8.39%	[1],[2]
Mortgages, loans payable and other obligations			[1]	3,878	[1]
9200 Edmonston Road [Member]
Debt Instrument [Line Items]
Property Name		9200 Edmonston Road (c)	[3]
Lender		Principal Commercial Funding L.L.C.	[3]
Effective Rate		5.53%	[2],[3]
Mortgages, loans payable and other obligations		4,158	[3]	4,305	[3]
Loan maturity date		1-May-13	[3]
Percentage of leased property occupied		100.00%
6305 Ivy Lane [Member]
Debt Instrument [Line Items]
Property Name		6305 Ivy Lane (d)	[4]
Lender		RGA Reinsurance Company	[4]
Effective Rate		5.53%	[2],[4]
Mortgages, loans payable and other obligations		5,811	[4]	5,984	[4]
Loan maturity date		1-Oct-13	[4]
Port Imperial South 4/5 [Member]
Debt Instrument [Line Items]
Property Name		Port Imperial South 4/5
Lender		Wells Fargo Bank N.A.
LIBOR		LIBOR+3.50	[2]
Spread over LIBOR		3.50%	[2]
Mortgages, loans payable and other obligations		36,355		34,889
Loan maturity date		31-Dec-13
395 West Passaic [Member]
Debt Instrument [Line Items]
Property Name		395 West Passaic	[4]
Lender		State Farm Life Insurance Co.	[4]
Effective Rate		6.00%	[2],[4]
Mortgages, loans payable and other obligations		9,858	[4]	10,231	[4]
Loan maturity date		1-May-14	[4]
6301 Ivy Lane [Member]
Debt Instrument [Line Items]
Property Name		6301 Ivy Lane
Lender		RGA Reinsurance Company
Effective Rate		5.52%	[2]
Mortgages, loans payable and other obligations		5,514		5,667
Loan maturity date		1-Jul-14
35 Waterview Boulevard [Member]
Debt Instrument [Line Items]
Property Name		35 Waterview Boulevard
Lender		Wells Fargo CMBS
Effective Rate		6.35%	[2]
Mortgages, loans payable and other obligations		18,502		18,746
Loan maturity date		11-Aug-14
6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]
Debt Instrument [Line Items]
Property Name		6 Becker, 85 Livingston, 75 Livingston & 20 Waterview	[5]
Lender		Wells Fargo CMBS	[5]
Effective Rate		10.22%	[2],[5]
Mortgages, loans payable and other obligations		63,945	[5]	63,126	[5]
Loan maturity date		11-Aug-14	[5]
Number of properties used to collateralized mortgage		4
4 Sylvan [Member]
Debt Instrument [Line Items]
Property Name		4 Sylvan
Lender		Wells Fargo CMBS
Effective Rate		10.19%	[2]
Mortgages, loans payable and other obligations		14,524		14,485
Loan maturity date		11-Aug-14
10 Independence [Member]
Debt Instrument [Line Items]
Property Name		10 Independence
Lender		Wells Fargo CMBS
Effective Rate		12.44%	[2]
Mortgages, loans payable and other obligations		16,536		16,251
Loan maturity date		11-Aug-14
Port Imperial South [Member]
Debt Instrument [Line Items]
Property Name		Port Imperial South
Lender		Wells Fargo Bank N.A.
LIBOR		LIBOR+1.75	[2]
Spread over LIBOR		1.75%	[2]
Mortgages, loans payable and other obligations		43,045		42,168
Loan maturity date		19-Sep-15
4 Becker [Member]
Debt Instrument [Line Items]
Property Name		4 Becker
Lender		Wells Fargo CMBS
Effective Rate		9.55%	[2]
Mortgages, loans payable and other obligations		38,681		38,274
Loan maturity date		11-May-16
5 Becker [Member]
Debt Instrument [Line Items]
Property Name		5 Becker (f)	[6]
Lender		Wells Fargo CMBS	[6]
Effective Rate		12.83%	[2],[6]
Mortgages, loans payable and other obligations		12,912	[6]	12,507	[6]
Loan maturity date		11-May-16	[6]
Number of impaired properties		8
210 Clay [Member]
Debt Instrument [Line Items]
Property Name		210 Clay
Lender		Wells Fargo CMBS
Effective Rate		13.42%	[2]
Mortgages, loans payable and other obligations		12,638		12,275
Loan maturity date		11-May-16
Various [Member]
Debt Instrument [Line Items]
Property Name		Various (g)	[7]
Lender		Prudential Insurance	[7]
Effective Rate		6.33%	[2],[7]
Mortgages, loans payable and other obligations		147,939	[7]	149,281	[7]
Loan maturity date		15-Jan-17	[7]
Number of properties used to collateralized mortgage		7
23 Main Street [Member]
Debt Instrument [Line Items]
Property Name		23 Main Street
Lender		JPMorgan CMBS
Effective Rate		5.59%	[2]
Mortgages, loans payable and other obligations		29,997		30,395
Loan maturity date		1-Sep-18
Harborside Plaza 5 [Member]
Debt Instrument [Line Items]
Property Name		Harborside Plaza 5
Lender		The Northwestern Mutual Life Insurance Co. & New York Life Insurance Co.
Effective Rate		6.84%	[2]
Mortgages, loans payable and other obligations		225,996		228,481
Loan maturity date		1-Nov-18
233 Canoe Brook Road [Member]
Debt Instrument [Line Items]
Property Name		233 Canoe Brook Road
Lender		The Provident Bank
Effective Rate		4.38%	[2]
Mortgages, loans payable and other obligations		3,895		3,945
Loan maturity date		1-Feb-19
100 Walnut Avenue [Member]
Debt Instrument [Line Items]
Property Name		100 Walnut Avenue
Lender		Guardian Life Insurance Co.
Effective Rate		7.31%	[2]
Mortgages, loans payable and other obligations		18,852		19,025
Loan maturity date		1-Feb-19
One River Center [Member]
Debt Instrument [Line Items]
Property Name		One River Center (h)	[8]
Lender		Guardian Life Insurance Co.	[8]
Effective Rate		7.31%	[2],[8]
Mortgages, loans payable and other obligations		$43,186	[8]	$43,582	[8]
Loan maturity date		1-Feb-19	[8]
Number of properties used to collateralized mortgage		3
[1]	With the sale of the property on May 31, 2013, the mortgage was satisfied by the Company. The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations: loss from early extinguishment of debt for the nine months ended September 30, 2013.
[2]	Reflects effective rate of debt, including deferred financing costs, comprised of the cost of terminated treasury lock agreements (if any), debt initiation costs, mark-to-market adjustment of acquired debt and other transaction costs, as applicable.
[3]	The lease with the tenant occupying 100 percent of the building expired on May 1, 2013 and the tenant continues to occupy the building on a month-to-month basis. The mortgage loan matured on May 1, 2013 and was not repaid. The Company received a notice of default from the lender on July 17, 2013. The Company has requested a modification of the loan terms and is also in discussions regarding a deed-in-lieu of foreclosure with the lender.
[4]	On October 1, 2013, the Company repaid the mortgage loan at par, using available cash. The original maturity date was January 1, 2014.Mortgage is cross collateralized by the four properties.The cash flow from this property is insufficient to cover operating costs and debt service. Consequently, the Company notified the lender and suspended debt service payments in August 2013. The Company has begun discussions with the lender regarding a modification of loan terms. The Company recorded an impairment charge on this asset along with eight other office properties as of September 30, 2013. See Note 3: Real Estate Transactions - Impairments.
[5]	Mortgage is cross collateralized by the four properties.
[6]	The cash flow from this property is insufficient to cover operating costs and debt service. Consequently, the Company notified the lender and suspended debt service payments in August 2013. The Company has begun discussions with the lender regarding a modification of loan terms. The Company recorded an impairment charge on this asset along with eight other office properties as of September 30, 2013. See Note 3: Real Estate Transactions - Impairments.
[7]	Mortgage is collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.
[8]	Mortgage is collateralized by the three properties comprising One River Center

Employee_Benefit_401k_Plans_An1

Employee Benefit 401(k) Plans And Deferred Retirement Compensation Agreements (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Minimum employee subscription rate, percentage of compensation			1.00%
Maximum employee subscription rate, percentage of compensation			60.00%
Employee pre-tax contributions vested percentage			100.00%
Vesting rate			20.00%
Percentage vested after total service period			100.00%
Employees' vesting rights			Participants are always 100 percent vested in their pre-tax contributions and will begin vesting in any matching or profit sharing contributions made on their behalf after two years of service with the Company at a rate of 20 percent per year, becoming 100 percent vested after a total of six years of service with the Company.
Expenses for employee benefit plan	$24,000	$0	$91,000	$0
Shares granted			68,139
Period upon which stock units become payable following a triggering event			30 days
Minimum [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Employer contribution vesting period			2 years
Maximum [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Employer contribution vesting period			6 years
Messr Hersh [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Amount of annual employer contribution to deferred retirement compensation			500,000
Messr Lefkowitz [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Amount of annual employer contribution to deferred retirement compensation			160,000
Messr Thomas [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Amount of annual employer contribution to deferred retirement compensation			$100,000
Deferred Retirement Compensation Units [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Shares granted			25,333

Disclosure_Of_Fair_Value_Of_Fi1

Disclosure Of Fair Value Of Financial Instruments (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Billions, unless otherwise specified
Disclosure Of Fair Value Of Financial Instruments [Abstract]
Fair value of Company's long-term debt	$2.50	$2.40
Book value of Company's long-term debt	$2.40	$2.20

Commitments_And_Contingencies_1

Commitments And Contingencies (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

22 Months Ended

9 Months Ended

15 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Oct. 01, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Apr. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

item

item

Harborside Residential Project [Member]

Harborside Residential Project [Member]

Harborside Residential Project [Member]

Harborside Residential Project [Member]

Wegmans Food Markets, Inc. [Member]

Wegmans Food Markets, Inc. [Member]

Wegmans Food Markets, Inc. [Member]

Minimum [Member]

Maximum [Member]

Property Lock-Ups [Member]

Property Lock-Ups Expired [Member]

Harborside Financial Center Plaza 4-A [Member]

Harborside Financial Center Plaza 4-A [Member]

Harborside Financial Center Plaza 4-A [Member]

Harborside Financial Center Plaza 4-A [Member]

Harborside Financial Center Plaza 5 [Member]

Harborside Financial Center Plaza 5 [Member]

Harborside Financial Center Plaza 5 [Member]

Harborside Financial Center Plaza 5 [Member]

Port Imperial 4/5 Garage Development [Member]

Roseland Partners, L.L.C. [Member]

Roseland Partners, L.L.C. [Member]

Roseland Assets [Member]

Completion Of Certain Developments [Member]

Start Of Construction On Certain Developments [Member]

Obtaining Of Tax Credits/Grants [Member]

Total Return To Shareholders [Member]

Failure To Achieve Certain Level Of Fee Revenue [Member]

property

property

Parent Company [Member]

sqft

property

property

Roseland Partners, L.L.C. [Member]

Roseland Partners, L.L.C. [Member]

Roseland Partners, L.L.C. [Member]

Roseland Partners, L.L.C. [Member]

Roseland Partners, L.L.C. [Member]

Roseland Partners, L.L.C. [Member]

Commitments And Contingencies [Line Items]

Project period

20 years

20 years

5 years

Percentage of PILOT on project costs

2.00%

2.00%

Total project costs

$15,700,000

$49,500,000

$170,900,000

Payments in lieu of property taxes (PILOT)

247,000

247,000

742,000

742,000

854,000

854,000

2,600,000

2,600,000

Period of real estate taxes phase in

5 years

Ground lease expense incurred

102,000

102,000

305,000

305,000

Fair value of contingent consideration

10,000,000

6,300,000

3,700,000

Business acquisition, contingent cash payment

15,600,000

8,600,000

2,800,000

2,800,000

3,000,000

7,000,000

2,000,000

Business acquisition, earn out period

3 years

3 years

Purchase accounting adjustments

0

Benefit related to change in fair value of Earn Out liability

1,000,000

Earn out paid

2,755,000

Contingent purchase price measurement period

33 months

Amount of cash deposited to escrow

34,000,000

Discount on contingently returnable consideration

0

Amount of escrow released

6,700,000

Number of properties

7

121

Properties aggregate net book value

124,800,000

1,600,000,000

Expiration year

2016

Delivery date to tenant

first quarter of 2016

second quarter of 2014

Total estimated costs of the project

291,000,000

Costs of the project incurred

9,000,000

3,500,000

State tax credit

33,000,000

Number of apartments

763

763

Percentage of interest in venture

85.00%

85.00%

7.50%

80.00%

Ownership percentage of third party venture

15.00%

15.00%

Capital credit receivable per square foot

30

Aggregate capital credits

20,300,000

20,300,000

Amount to fund

77,000,000

Area of property (in square feet)

140,000

Obligations following cancelation of project

$0

$0

Number of parking spaces

850

850

Holding and distribution pattern under operating agreement

Pursuant to the Development Agreement, the Company and Ironstate shall co-develop the Harborside Residential Project with Ironstate responsible for obtaining all required development permits and approvals. Major decisions with respect to the Harborside Residential Project will require the consent of the Company and Ironstate. The Company and Ironstate will have 85 and 15 percent interests, respectively, in the Harborside Residential Project. The Company will receive capital credit of $30 per approved developable square foot for its land, aggregating to approximately $20.3 million at September 30, 2013. In addition to the capital credit it will receive for its land contribution, the Company currently expects that it will fund approximately $77 million of the development costs of the project.

Commitments_And_Contingencies_2

Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Commitments And Contingencies [Abstract]
October 1 through December 31, 2013	$88
2014	367
2015	371
2016	371
2017	267
2018 through 2084	16,051
Total	$17,515

Tenant_Leases_Details

Tenant Leases (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Property Subject to or Available for Operating Lease [Line Items]
October 1 through December 31, 2013	125,682
2014	495,819
2015	444,042
2016	399,155
2017	348,011
2018 and thereafter	1,290,172
Total	3,102,881
Tenant Leases [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating leases with various expiration dates through year	31-Mar-33

MackCali_Realty_Corporation_St2

Mack-Cali Realty Corporation Stockholders' Equity (Share Repurchase Program And Dividend Reinvestment And Stock Purchase Plan) (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Mack Cali Realty Corporation Stockholders Equity [Line Items]
Maximum percentage of outstanding share owned by REIT	50.00%
Date share repurchase program was initiated	Sep-12
Capacity of share repurchase program	$150,000,000
Shares purchased and retired	394,625
Aggregate cost of stock repurchased	11,000,000
Capacity available for additional repurchase of outstanding common stock	139,000,000
Dividend Reinvestment And Stock Purchase Plan [Member]
Mack Cali Realty Corporation Stockholders Equity [Line Items]
Common stock reserved for future issuance	5,500,000
Monthly cash investment without restriction, maximum	$5,000

MackCali_Realty_Corporation_St3

Mack-Cali Realty Corporation Stockholders' Equity (Stock Options Plans) (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

31-May-13

31-May-04

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

2013 Incentive Stock Plan [Member]

2004 Incentive Stock Plan [Member]

2013 And 2004 Incentive Stock Plans [Member]

Employee And Director Plan [Member]

Employee And Director Plan [Member]

2000 Employee Plan [Member]

2000 Employee Plan [Member]

2000 Director Plan [Member]

2000 Director Plan [Member]

Employee Plan [Member]

2000 Director Plan And Director Plan [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Reserved stocks for issuance

4,600,000

2,500,000

2,700,000

4,350,000

2,500,000

4,000,000

200,000

350,000

Shares issued

0

Exercisable time period

5 years

1 year

Stock option terms

10 years

Weighted average remaining contractual life

1 year

1 month 6 days

Proceeds from stock options exercised

$0

$0

$0

$0

Total intrinsic value of options exercised

0

0

0

0

Stock options expense

$0

$0

$0

$0

MackCali_Realty_Corporation_St4

Mack-Cali Realty Corporation Stockholders' Equity (Restricted Stock Awards And TSR-Based Awards) (Narrative) (Details) (USD $)	9 Months Ended				9 Months Ended					1 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Jan. 31, 2014	Dec. 31, 2014
			Restricted Stock [Member]	Restricted Stock [Member]	Restricted Stock [Member]	Restricted Stock [Member]	Ratified Restricted Stock Awards [Member]	Ratified Restricted Stock Awards [Member]	Total Stockholder Return Based Awards [Member]	Scenario, Forecast [Member]	Scenario, Forecast [Member]
					Minimum [Member]	Maximum [Member]	Minimum [Member]	Maximum [Member]		Ratified Restricted Stock Awards [Member]	Total Stockholder Return Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Stock Award vesting period					1 year	7 years	5 years	7 years	4 years
Unvested restricted stock outstanding	95,858	134,328	351,592	105,843
Restricted stock awards unvested shares outstanding, performance contingent			319,667
Awards issued	68,139								1,032	319,667	5,160
Value of common stock received upon vesting of awards									$1,000
Total unrecognized compensation cost	$700,000
Total unrecognized compensation cost, period of recognition	4 months 24 days

MackCali_Realty_Corporation_St5

Mack-Cali Realty Corporation Stockholders' Equity (Deferred Stock Compensation Plan For Directors) (Narrative) (Details)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Maximum percentage of retainer fee that directors may defer	100.00%
Deferred stock units earned	16,332	13,057
Deferred stock units outstanding	130,481		115,331

MackCali_Realty_Corporation_St6

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share) (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock outstanding	95,858		95,858		134,328
Dividends declared per common share	$0.30	$0.45	$1.05	$1.35
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock outstanding	351,592	105,843	351,592	105,843

MackCali_Realty_Corporation_St7

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Stock Option Plans) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Shares Under Options - Outstanding, beginning balance	183,870
Shares Under Options - Lapsed or Cancelled	-168,870
Shares Under Options - Outstanding, ending balance	15,000
Shares Under Options - Options exercisable	15,000
Shares Under Options - Available for grant	4,600,000
Weighted Average Exercise Price - Outstanding, beginning balance	$29.51
Weighted Average Exercise Price - Lapsed or Cancelled	$28.53
Weighted Average Exercise Price - Outstanding, ending balance	$40.54
Outstanding stock option price range, lower range	$35.59
Outstanding stock option price range, upper range	$45.47

MackCali_Realty_Corporation_St8

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Restricted Stock Awards) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Unvested restricted stock outstanding, beginning balance	134,328
Shares, Granted	68,139
Shares, Vested	-106,463
Shares, Forfeited	-146
Unvested restricted stock outstanding, ending balance	95,858
Weighted-Average Grant-Date Fair Value, Outstanding beginning balance	$31.65
Weighted-Average Grant-Date Fair Value, Granted	$28.65
Weighted-Average Grant-Date Fair Value, Vested	$33.32
Weighted-Average Grant-Date Fair Value, Forfeited	$26.36
Weighted-Average Grant-Date Fair Value, Outstanding ending balance	$27.67

MackCali_Realty_Corporation_St9

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Basic Computation Of EPS) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Income (loss) from continuing operations	($46,046)	$9,827	($29,506)	$37,018
Add: Noncontrolling interest in consolidated joint ventures	1,838	85	1,962	256
Deduct: Noncontrolling interest in Operating Partnership	5,314	-1,207	3,295	-4,543
Income (loss) from continuing operations available to common shareholders	-38,894	8,705	-24,249	32,731
Income from discontinued operations available to common shareholders	43,537	5,576	63,519	17,418
Net income available to common shareholders	$4,643	$14,281	$39,270	$50,149
Weighted average common shares	87,793	87,826	87,724	87,814
Income (loss) from continuing operations available to common shareholders	($0.44)	$0.10	($0.28)	$0.37
Income from discontinued operations available to common shareholders	$0.49	$0.06	$0.73	$0.20
Net income available to common shareholders	$0.05	$0.16	$0.45	$0.57

Recovered_Sheet27

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Income (loss) from continuing operations attributable to common shareholders	($38,894)	$8,705	($24,249)	$32,731
Add: Noncontrolling interest in Operating Partnership	-5,314	1,207	-3,295	4,543
Income (loss) from continuing operations for diluted earnings per share	-44,208	9,912	-27,544	37,274
Income from discontinued operations for diluted earnings per share	49,485	6,349	72,218	19,836
Net income available to common shareholders	$5,277	$16,261	$44,674	$57,110
Weighted average common shares	99,787	100,075	99,778	100,071
Income (loss) from continuing operations available to common shareholders	($0.44)	$0.10	($0.28)	$0.37
Income from discontinued operations available to common shareholders	$0.49	$0.06	$0.73	$0.20
Net income available to common shareholders	$0.05	$0.16	$0.45	$0.57

Recovered_Sheet28

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation) (Details)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]
Basic EPS shares	87,793	87,826	87,724	87,814
Add: Operating Partnership - common units	11,994	12,177	12,054	12,184
Restricted Stock Awards		72		73
Diluted EPS Shares	99,787	100,075	99,778	100,071

Noncontrolling_Interests_In_Su2

Noncontrolling Interests In Subsidiaries (Narrative) (Details) (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Noncontrolling Interest [Line Items]
Number of common shares received upon redemption of common units	1
Rebalance of ownership percentage	$0.50
Percentage of noncontrolling interest	12.00%	12.20%
Participation Rights [Member]
Noncontrolling Interest [Line Items]
Excess net cash flow remaining after the distribution to the Company	50.00%
Internal rate of return	10.00%
Office Buildings [Member] | Participation Rights [Member]
Noncontrolling Interest [Line Items]
Number of properties	3

Noncontrolling_Interests_In_Su3

Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details)	9 Months Ended
	Sep. 30, 2013	Oct. 03, 2013	Jan. 04, 2013
Noncontrolling Interests In Subsidiaries [Abstract]
Balance, Beginning	12,141,836	11,987,175	12,141,836
Redemption of common units for shares of common stock	-154,661
Balance, Ending	11,987,175	11,987,175	12,141,836

Segment_Reporting_Narrative_De

Segment Reporting (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of business segments	3
Foreign Locations [Member]
Segment Reporting Information [Line Items]
Revenue	$0	$0
Long lived assets	$0		$0

Segment_Reporting_Selected_Res

Segment Reporting (Selected Results Of Operations And Asset Information) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Segment Reporting Information [Line Items]
Total revenues	$162,505		$156,797		$501,764		$486,291
Total operating and interest expenses	113,528	[1]	105,896	[1]	345,389	[1]	318,889	[1]
Equity in earnings (loss) of unconsolidated joint ventures	-229		2,418		-2,059		4,751
Net operating income (loss)	48,748	[2]	53,319	[2]	154,316	[2]	172,153	[2]
Total assets	4,609,263				4,609,263				4,526,045
Total long-lived assets	3,988,430	[3]			3,988,430	[3]			4,234,408	[3]
Real Estate - Commercial And Other [Member]
Segment Reporting Information [Line Items]
Total revenues	153,602		155,314		465,564		477,345
Total operating and interest expenses	72,498	[1]	70,584	[1]	210,917	[1]	205,774	[1]
Equity in earnings (loss) of unconsolidated joint ventures	1,919		2,418		5,149		4,751
Net operating income (loss)	83,023	[2]	87,148	[2]	259,796	[2]	276,322	[2]
Total assets	3,997,545				3,997,545				4,382,843
Total long-lived assets	3,720,747	[3]			3,720,747	[3]			4,160,362	[3]
Real Estate - Multi Family [Member]
Segment Reporting Information [Line Items]
Total revenues	3,736				8,673
Total operating and interest expenses	1,960	[1]			4,066	[1]
Equity in earnings (loss) of unconsolidated joint ventures	-2,830				-7,890
Net operating income (loss)	-1,054	[2]			-3,283	[2]
Total assets	245,573				245,573				65,723
Total long-lived assets	235,629	[3]			235,629	[3]			62,525	[3]
Multi Family Services [Member]
Segment Reporting Information [Line Items]
Total revenues	6,867	[4]			18,745	[5]
Total operating and interest expenses	8,214	[1]			23,345	[1]
Equity in earnings (loss) of unconsolidated joint ventures	682				682
Net operating income (loss)	-665	[2]			-3,918	[2]
Total assets	12,297				12,297				12,159
Total long-lived assets	194	[3]			194	[3]
Fee revenue	665				1,432
Corporate & Other [Member]
Segment Reporting Information [Line Items]
Total revenues	-1,700	[6]	1,483	[6]	8,782	[6]	8,946	[6]
Total operating and interest expenses	30,856	[1],[6]	35,312	[1],[6]	107,061	[1],[6]	113,115	[1],[6]
Net operating income (loss)	-32,556	[2],[6]	-33,829	[2],[6]	-98,279	[2],[6]	-104,169	[2],[6]
Total assets	353,848	[6]			353,848	[6]			65,320	[6]
Total long-lived assets	$31,860	[3],[6]			$31,860	[3],[6]			$11,521	[3],[6]
[1]	Total operating and interest expenses represent the sum of: real estate taxes; utilities; operating services; direct construction costs; real estate services expenses; general and administrative and interest expense (net of interest income). All interest expense, net of interest income, (including for property-level mortgages) is excluded from segment amounts and classified in Corporate & Other for all periods.
[2]	Net operating income represents total revenues less total operating and interest expenses (as defined in Note bab), plus equity in earnings (loss) of unconsolidated joint ventures, for the period.
[3]	Long-lived assets are comprised of net investment in rental property, unbilled rents receivable, goodwill and investments in unconsolidated joint ventures.
[4]	Includes $665 of fees earned for this period from the multifamily real estate segment, which are eliminated in consolidation.
[5]	Includes $1,432 of fees earned for this period from the multifamily real estate segment, which are eliminated in consolidation.
[6]	Corporate & Other represents all corporate-level items (including interest and other investment income, interest expense, non-property general and administrative expense, construction services revenue and direct construction costs) as well as intercompany eliminations necessary to reconcile to consolidated Company totals.

Segment_Reporting_Schedule_Of_

Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Income From Continuing Operations) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Information [Line Items]
Net operating income	$48,748	[1]	$53,319	[1]	$154,316	[1]	$172,153	[1]
Depreciation and amortization	-46,094		-43,492		-135,122		-130,720
Loss from early extinguishment of debt							-4,415
Impairments	-48,700				-48,700
Income from continuing operations	-46,046		9,827		-29,506		37,018
Income from discontinued operations	2,164		6,337		11,842		17,446
Loss from early extinguishment of debt					-703
Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net	47,321		12		61,079		2,390
Total discontinued operations, net	49,485		6,349		72,218		19,836
Net income	3,439		16,176		42,712		56,854
Noncontrolling interest in consolidated joint ventures	1,838		85		1,962		256
Noncontrolling interest in Operating Partnership	5,314		-1,207		3,295		-4,543
Noncontrolling interest in discontinued operations	-5,948		-773		-8,699		-2,418
Net income available to common shareholders	4,643		14,281		39,270		50,149
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net operating income	48,748		53,319		154,316		172,153
Net income available to common shareholders	4,643		14,281		39,270		50,149
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	-46,094		-43,492		-135,122		-130,720
Loss from early extinguishment of debt							-4,415
Noncontrolling interest in consolidated joint ventures	1,838		85		1,962		256
Noncontrolling interest in Operating Partnership	5,314		-1,207		3,295		-4,543
Noncontrolling interest in discontinued operations	($5,948)		($773)		($8,699)		($2,418)
[1]	Net operating income represents total revenues less total operating and interest expenses (as defined in Note bab), plus equity in earnings (loss) of unconsolidated joint ventures, for the period.