Veris Residential (VRE) 10-Q 24 Jul 14 2014 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 23, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'MACK CALI REALTY CORP	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Entity Central Index Key	'0000924901	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Entity Common Stock, Shares Outstanding	'	88,986,073

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
Rental property	'	'
Land and leasehold interests	$725,542,000	$750,658,000
Buildings and improvements	3,807,642,000	3,915,800,000
Tenant improvements	423,988,000	456,003,000
Furniture, fixtures and equipment	9,461,000	7,472,000
Gross investment in rental property	4,966,633,000	5,129,933,000
Less - accumulated depreciation and amortization	-1,389,202,000	-1,400,988,000
Net investment in rental property	3,577,431,000	3,728,945,000
Cash and cash equivalents	80,943,000	221,706,000
Investments in unconsolidated joint ventures	265,866,000	181,129,000
Unbilled rents receivable, net	126,111,000	136,304,000
Deferred charges, goodwill and other assets	266,760,000	218,519,000
Restricted cash	26,405,000	19,794,000
Accounts receivable, net of allowance for doubtful accounts of $2,163 and $2,832	11,256,000	8,931,000
Total assets	4,354,772,000	4,515,328,000
LIABILITIES AND EQUITY	'	'
Senior unsecured notes	1,417,141,000	1,616,575,000
Revolving credit facility	56,000,000	0
Mortgages, loans payable and other obligations	735,127,000	746,191,000
Dividends and distributions payable	15,173,000	29,938,000
Accounts payable, accrued expenses and other liabilities	140,546,000	121,286,000
Rents received in advance and security deposits	48,932,000	53,730,000
Accrued interest payable	25,973,000	29,153,000
Total liabilities	2,438,892,000	2,596,873,000
Commitments and contingencies	'	'
Mack-Cali Realty Corporation stockholders' equity:	'	'
Common stock, $0.01 par value, 190,000,000 shares authorized, 88,982,062 and 88,247,591 shares outstanding	890,000	882,000
Additional paid-in capital	2,554,841,000	2,539,326,000
Dividends in excess of net earnings	-902,036,000	-897,849,000
Total Mack-Cali Realty Corporation stockholders' equity	1,653,695,000	1,642,359,000
Noncontrolling interests in subsidiaries:	'	'
Operating Partnership	207,479,000	220,813,000
Consolidated joint ventures	54,706,000	55,283,000
Total noncontrolling interests in subsidiaries	262,185,000	276,096,000
Total equity	1,915,880,000	1,918,455,000
Total liabilities and equity	$4,354,772,000	$4,515,328,000

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Consolidated Balance Sheets [Abstract]	'	'
Allowance for doubtful accounts receivable	$2,163	$2,832
Common stock, par value per share	$0.01	$0.01
Common stock, shares authorized	190,000,000	190,000,000
Common stock, shares outstanding	88,982,062	88,247,591

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
REVENUES	'	'	'	'
Base rents	$133,210	$135,438	$267,261	$269,061
Escalations and recoveries from tenants	16,996	17,456	42,564	36,944
Construction services	'	6,746	'	14,972
Real estate services	7,009	6,642	13,701	13,085
Parking income	2,236	1,597	4,350	2,989
Other income	849	467	2,020	2,208
Total revenues	160,300	168,346	329,896	339,259
EXPENSES	'	'	'	'
Real estate taxes	23,375	19,834	47,726	41,483
Utilities	14,573	13,739	42,854	30,027
Operating services	27,840	25,327	57,062	50,635
Direct construction costs	'	6,511	'	14,336
Real estate services expenses	6,571	5,304	13,280	10,257
General and administrative	13,673	13,111	36,554	25,084
Depreciation and amortization	44,711	45,665	89,696	89,013
Total expenses	130,743	129,491	287,172	260,835
Operating income	29,557	38,855	42,724	78,424
OTHER (EXPENSE) INCOME	'	'	'	'
Interest expense	-28,159	-31,270	-58,105	-61,139
Interest and other investment income	922	1,094	1,308	1,100
Equity in earnings (loss) of unconsolidated joint ventures	443	-80	-792	-1,830
Realized gains (losses) and unrealized losses on disposition of rental property, net	54,584	'	54,584	'
Total other (expense) income	27,790	-30,256	-3,005	-61,869
Income from continuing operations	57,347	8,599	39,719	16,555
Discontinued operations:	'	'	'	'
Income from discontinued operations	'	4,530	'	9,663
Loss from early extinguishment of debt	'	-703	'	-703
Realized gains (losses) and unrealized losses on disposition of rental property, net	'	13,758	'	13,758
Total discontinued operations	'	17,585	'	22,718
Net income	57,347	26,184	39,719	39,273
Noncontrolling interest in consolidated joint ventures	290	62	612	124
Noncontrolling interest in Operating Partnership	-6,514	-1,048	-4,506	-2,021
Noncontrolling interest in discontinued operations	'	-2,127	'	-2,749
Net income available to common shareholders	$51,123	$23,071	$35,825	$34,627
Basic earnings per common share:	'	'	'	'
Income from continuing operations	$0.58	$0.09	$0.40	$0.16
Discontinued operations	'	$0.17	'	$0.23
Net income available to common shareholders	$0.58	$0.26	$0.40	$0.39
Diluted earnings per common share:	'	'	'	'
Income from continuing operations	$0.58	$0.09	$0.40	$0.16
Discontinued operations	'	$0.17	'	$0.23
Net income available to common shareholders	$0.58	$0.26	$0.40	$0.39
Basic weighted average shares outstanding	88,691	87,708	88,491	87,688
Diluted weighted average shares outstanding	100,023	99,895	99,964	99,892

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, 2013	$882	$2,539,326	($897,849)	$276,096	$1,918,455
Balance, shares at Dec. 31, 2013	88,248	'	'	'	'
Net income	'	'	35,825	3,894	39,719
Common stock dividends	'	'	-40,012	'	-40,012
Common unit distributions	'	'	'	-5,129	-5,129
Increase in noncontrolling interest	'	'	'	35	35
Redemption of common units for common stock, value	7	12,866	'	-12,873	'
Redemption of common units for common stock, shares	701	'	'	'	'
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value	'	77	'	'	77
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares	4	'	'	'	'
Director deferred compensation plan	'	213	'	'	213
Stock compensation, value	1	2,521	'	'	2,522
Stock compensation, shares	29	'	'	'	'
Rebalancing of ownership percentage between parent and subsidiaries	'	-162	'	162	'
Balance, value at Jun. 30, 2014	$890	$2,554,841	($902,036)	$262,185	$1,915,880
Balance, shares at Jun. 30, 2014	88,982	'	'	'	'

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net income	$39,719	$39,273
Adjustments to reconcile net income to net cash provided by Operating activities:	'	'
Depreciation and amortization, including related intangible assets	90,460	88,950
Depreciation and amortization on discontinued operations	'	6,442
Amortization of deferred stock units	213	'
Amortization of stock compensation	5,563	1,687
Amortization of deferred financing costs and debt discount	1,528	1,582
Equity in (earnings) loss of unconsolidated joint venture, net	792	1,830
Distributions of cumulative earnings from unconsolidated joint ventures	3,756	4,712
Realized (gains) and unrealized losses on disposition of rental property, net	-54,584	-13,758
Changes in operating assets and liabilities:	'	'
Increase in unbilled rents receivable, net	-3,551	-8,216
Increase in deferred charges, goodwill and other assets	-8,592	-16,859
(Increase) decrease in accounts receivable, net	-2,325	1,171
Increase in accounts payable, accrued expenses and other liabilities	19,946	3,120
Decrease in rents received in advance and security deposits	-4,798	-6,758
(Decrease) increase in accrued interest payable	-3,180	1,007
Net cash provided by operating activities	84,947	104,183
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Rental property acquisitions and related intangibles	-37,696	-149,200
Rental property additions and improvements	-41,825	-39,688
Development of rental property, other related costs and deposits	-7,896	-12,204
Proceeds from the sale of rental property	190,798	161,727
Investments in notes receivable	-62,276	'
Repayment of notes receivable	250	83
Investment in unconsolidated joint ventures	-38,948	-31,500
Distributions in excess of cumulative earnings from unconsolidated joint ventures	837	20,354
Increase in restricted cash	-6,611	-300
Net cash used in investing activities	-3,367	-50,728
CASH FLOW FROM FINANCING ACTIVITIES	'	'
Borrowings from revolving credit facility	233,500	289,000
Repayment of revolving credit facility	-177,500	-289,000
Proceeds from senior unsecured notes	'	268,928
Repayment of senior unsecured notes	-200,000	-100,000
Proceeds from mortgages and loans payable	28,135	1,798
Repayment of mortgages, loans payable and other obligations	-42,469	-9,420
Payment of contingent consideration	-3,936	-2,755
Payment of financing costs	-198	-2,643
Payment of dividends and distributions	-59,875	-89,669
Net cash (used in) provided by financing activities	-222,343	66,239
Net (decrease) increase in cash and cash equivalents	-140,763	119,694
Cash and cash equivalents, beginning of period	221,706	58,245
Cash and cash equivalents, end of period	$80,943	$177,939

Organization_And_Basis_Of_Pres

Organization And Basis Of Presentation	6 Months Ended
	Jun. 30, 2014
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 June 30, 2014, the Company owned or had interests in 279 properties, consisting of 266 commercial properties, primarily class A office and office/flex properties, totaling approximately 31.5 million square feet, leased to approximately 2,000 commercial tenants, and 13 multi-family rental properties containing 3,898 residential units, plus developable land (collectively, the “Properties”).  The Properties are comprised of 251 buildings, primarily office and office/flex buildings totaling approximately 30.9 million square feet (which include 30 buildings, primarily office buildings aggregating approximately 5.1 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, 13 multi-family properties totaling 3,898 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 121,500 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.
	As of June 30, 2014 and December 31, 2013, the Company’s investments in consolidated real estate joint ventures in which the Company is deemed to be the primary beneficiary have total real estate assets of $227 million and $219.9 million,  respectively, mortgages of $85.8 million and $81.9 million, respectively, and other liabilities of $15.1 million and $18.3 million, respectively.
	The preparation of financial statements in conformity with 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	6 Months Ended
	Jun. 30, 2014
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 $0.9 million and $0.9 million for the three months ended June 30, 2014 and 2013, respectively, and $1.8 and $1.7 million for the six months ended June 30, 2014 and 2013, respectively.  Included in total rental property is construction, tenant improvement and development in-progress of $44.2 million and $40.8 million as of June 30, 2014 and December 31, 2013, 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 substantial 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.
	Rental Property
	Held for Sale
	When 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.
	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 extent 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 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 $759,000 and $809,000 for the three months ended June 30, 2014 and 2013, respectively, $1,528,000 and $1,582,000 for the six months ended June 30, 2014 and 2013, respectively. If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (loss) from early extinguishment of debt.
	Deferred
	Leasing CostsCosts incurred in connection with commercial 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 related to commercial leases, which is capitalized and amortized, approximated $845,000 and $1,033,000 for the three months ended June 30, 2014 and 2013, respectively, and $1,876,000 and $2,206,000 for the six months ended June 30, 2014 and 2013, respectively.
	GoodwillGoodwill represents the excess of the purchase price over the fair value of net tangible and intangible assets acquired in a business combination. Goodwill is allocated to various reporting units, as applicable.  Each of the Company’s segments consists of a reporting unit. Goodwill is not amortized.  Management performs an annual impairment test for goodwill during the fourth quarter and between annual tests, management evaluates the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable.  In its impairment tests of goodwill, management first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount.  If based on this assessment, management determines that the fair value of the reporting unit is not less than its carrying amount, then performing the additional two-step impairment test is unnecessary. If the carrying amount of goodwill exceeds its fair value, an impairment charge is recognized.
	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.
	Parking income includes income from parking spaces leased to tenants and others.
	Other income includes income from tenants for additional services arranged for by the Company and income from tenants for early lease terminations.
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-09 Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. In adopting ASU 2014-09, companies may use either a full retrospective or a modified retrospective approach. Additionally, this guidance requires improved disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.  ASU 2014-09 is effective for the first interim period within annual reporting periods beginning after December 15, 2016, and early adoption is not permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2014-09 will have on the Company’s financial position or results of operations.
	Allowance for
	Doubtful AccountsManagement performs a detailed review of amounts due from tenants to determine if an allowance for doubtful accounts is required based on factors affecting the collectability of the accounts receivable balances. The factors considered by management in determining which individual tenant receivable balances, or aggregate receivable balances, require a collectability allowance include the age of the receivable, the tenant’s payment history, the nature of the charges, any communications regarding the charges and other related information. 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 (determined by excluding any net capital gains) to its shareholders.  If and to the extent the Company retains and does not distribute any net capital gains, the Company will be required to pay federal, state and local taxes on such net capital gains at the rate applicable to capital gains of a corporation.  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.   The Company has conducted business through its TRS entities for certain property management, development, construction and other related services, as well as to hold a joint venture interest in a hotel and other matters.  As of June 30, 2014, the Company had a deferred tax asset with a balance of approximately $14.1 million which has been fully reserved for through a valuation allowance.  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 June 30, 2014, the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2009 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 from continuing operations 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 June 30, 2014 represents dividends payable to common shareholders (88,730,563 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (11,161,018 common units) for all such holders of record as of July 3, 2014 with respect to the second quarter 2014.  The second quarter 2014 common stock dividends and common unit distributions of $0.15 per common share and unit were approved by the Board of Directors on May 30, 2014.  The common stock dividends and common unit distributions payable were paid on July 11, 2014.
	The dividends and distributions payable at December 31, 2013 represents dividends payable to common shareholders (87,928,002 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (11,864,775 common units) for all such holders of record as of January 6, 2014 with respect to the fourth quarter 2013.  The fourth 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 December 10, 2013.  The common stock dividends and common unit distributions payable were paid on January 15, 2014.
	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 at the grant date be amortized ratably into expense over the appropriate vesting period.  The Company recorded stock compensation expense of $877,000 and $461,000 for the three months ended June 30, 2014 and 2013, respectively, and $4,264,000 (which includes $3,203,000 related to the departure of executive vice presidents.  See Note 13: Commitments and Contingencies – Departure of Executive Vice Presidents); and $1,306,000 for the six months ended June 30, 2014 and 2013, 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 six months ended June 30, 2014 and 2013, and no accumulated other comprehensive income as of June 30, 2014 and December 31, 2013.
	Fair Value
	HierarchyThe standard Fair Value Measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources (observable inputs). The following summarizes the fair value hierarchy:
		·	Level 1: Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities;
	·	Level 2: Quoted prices for identical assets and liabilities in markets that are inactive, quoted prices for similar assets and liabilities inactive markets or financial instruments for which significant inputs are observable, either directly or indirectly, such as interest rates and yield curves that are observable at commonly quoted intervals and
	·	Level 3: Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy.  In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety.  The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
Discontinued
OperationsIn April 2014, the FASB issued guidance related to the reporting of discontinued operation and disclosures of disposals of components of an entity.  This guidance defines a discontinued operation as a component or group of components disposed or classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and final result; the guidance states that a strategic shift could include a disposal of a major geographical area of operations, a major line of business, a major equity method investment or other major parts of an entity.  The guidance also provides for additional disclosure requirements in connection with both discontinued operations and other dispositions not qualifying as discontinued operations.  The guidance will be effective for annual and interim periods beginning on or after December 15, 2014. The guidance applies prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date.  All entities may early adopt the guidance for new disposals (or new classifications as held for sale) that have not been reported in financial statements previously issued or available for issuance.    The Company has elected to early adopt this standard effective with the interim period beginning January 1, 2014.    Prior to January 1, 2014, properties identified as held for sale and/or disposed of were presented in discontinued operations for all periods presented.  See Note 7: Discontinued Operations.

Real_Estate_Transactions

Real Estate Transactions	6 Months Ended
	Jun. 30, 2014
Real Estate Transactions [Abstract]	'
Real Estate Transactions	'
	3.    REAL ESTATE TRANSACTIONS
	Acquisitions
	On April 10, 2014, the Company acquired Andover Place, a 220-unit multi-family rental property located in Andover, Massachusetts, for approximately $37.7 million, which was funded primarily through borrowing under the Company’s unsecured revolving credit facility.
	The purchase price was allocated to the net assets acquired, as follows (in thousands):
			Andover
			Place
	Land	$	8,535
	Buildings and improvements		27,609
	Furniture, fixtures and equipment		459
	In-place lease values (1)		1,118
			37,721
	Less: Below market lease values (1)		-25
	Net cash paid at acquisition	$	37,696
	(1)In-place lease values and below market lease values will be amortized over one year or less.
	Sales
	The Company sold the following office properties during the six months ended June 30, 2014 (dollars in thousands):
					Rentable			Net			Net
	Sale			# of	Square			Sales			Book			Realized
	Date	Property/Address	Location	Bldgs.	Feet			Proceeds			Value			Gain
	4/23/14	22 Sylvan Way	Parsippany, New Jersey	1	249,409		$	94,897		$	60,244		$	34,653
	6/23/14	30 Knightsbridge Road (a)	Piscataway, New Jersey	4	680,350			54,641			52,361			2,280
	6/23/14	470 Chestnut Ridge Road (a) (b)	Woodcliff Lake, New Jersey	1	52,500			7,195			7,109			86
	6/23/14	530 Chestnut Ridge Road (a) (b)	Woodcliff Lake, New Jersey	1	57,204			6,299			6,235			64
	6/27/14	400 Rella Boulevard	Suffern, New York	1	180,000			27,539			10,938			16,601
	6/30/14	412 Mount Kemble Avenue (a)	Morris Township, New Jersey	1	475,100			44,751			43,851			900
	Totals:			9	1,694,563		$	235,322		$	180,738		$	54,584
	(a)The Company completed the sale of these properties for approximately $117 million: $114.6 million in cash and subordinated equity interests in each of the properties sold with capital accounts aggregating $2.4 million. Net sale proceeds from the sale aggregated $112.9 million which was comprised of the $117 million gross sales price less the subordinated equity interests of $2.4 million and $1.7 million in closing costs.  The purchasers of these properties are joint ventures formed between the Company and affiliates of the Keystone Property Group (“Keystone Entities”).  The senior equity will receive a 15 percent internal rate of return (“IRR”) after which the subordinated equity will receive a ten percent IRR and then all distributable cash flow will be split equally between the Keystone Entities and the Company. 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.  The Company has contracts with Keystone Entities to sell an additional seven of its office properties in New Jersey, New York and Connecticut, aggregating approximately 928,258 square feet, for approximately $104 million, comprised of: $78.3 million in cash from a combination of Keystone Entities senior and pari-passu equity and mortgage financing; Company subordinated equity interests in each of the properties being sold with capital accounts aggregating $18.8 million; and Company pari passu equity interests in three of the properties being sold aggregating $6.9 million.
	(b)The Company recorded an impairment charge of $3.9 million on these properties at December 31, 2013 as it estimated that the carrying value of the properties may not be recoverable over their anticipated holding periods.
	On January 1, 2014, the Company early adopted the new discontinued operations standard and as the properties sold in the six months ended June 30, 2014 will not represent a strategic shift (as the Company is not entirely exiting markets or property types), they have not been reflected as part of discontinued operations.
	The following table summarizes income from the properties sold during the six months ended June 30, 2014 for the three and six months ended June 30, 2014 and 2013: (dollars in thousands)  See Note 7: Discontinued Operations for properties sold in 2013.
				Three Months Ended						Six Months Ended
				June 30,						June 30,
				2014			2013			2014			2013
	Total revenues		$	6,547		$	9,235		$	16,302		$	18,478
	Operating and other expenses			-3,208			-3,918			-8,764			-7,099
	Depreciation and amortization			-1,433			-2,190			-3,379			-4,376
	Interest income			3			-			3			-
	Income from properties sold			1,909			3,127			4,162			7,003
	For the three and six months ended June 30, 2014, included in general and administrative expense was an aggregate of approximately $1.9 million in transactions costs related to the Company’s property and joint venture acquisitions.
	Excluded from the cash flow statement for the six months ended June 30, 2014 was $4.4 million of sale proceeds and $40 million of acquisition and other investment fundings, which were handled through a qualified intermediary.

Investments_In_Unconsolidated_

Investments In Unconsolidated Joint Ventures	6 Months Ended
	Jun. 30, 2014
Investments In Unconsolidated Joint Ventures [Abstract]	'
Investments In Unconsolidated Joint Ventures	'
	4.    INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES
	As of June 30, 2014, the Company had an aggregate investment of approximately $265.9 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 June 30, 2014, the unconsolidated joint ventures owned: 29 office and two retail properties aggregating approximately 4.7 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 3,317 apartments; and interests and/or rights to developable land parcels able to accommodate up to 4,130 apartments and 1.5 million square feet of office space.  The Company’s unconsolidated interests range from 7.5 percent to 85 percent subject to specified priority allocations in certain of the joint ventures.
	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 locations of the properties extend from New Jersey to Massachusetts, with the majority of the properties located in New Jersey.  Certain of the entities which own the Roseland Assets are controlled by the Company upon acquisition and are therefore consolidated. However, many of the entities are not controlled by the Company and, therefore, are accounted for under the equity method as investments in unconsolidated 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 has agreed to guarantee repayment of a portion of the debt of its unconsolidated joint ventures.  As of June 30, 2014, such debt had a total facility amount of $311.1 million of which the Company agreed to guarantee up to $89.9 million.  As of June 30, 2014, the outstanding balance of such debt totaled $200.6 million of which $79.8 million was guaranteed by the Company.  The Company also posted a $4.6 million letter of credit in support of the South Pier at Harborside joint venture, half of which is indemnified by Hyatt Corporation, the Company’s joint venture partner.  The Company performed management, leasing, development and other services for the properties owned by the unconsolidated joint ventures and recognized $1.4 million and $1.3 for such services in the three months ended June 30, 2014 and 2013, respectively, and $2.8 million and $2.3 million for the six months ended June 30, 2014 and 2013, respectively.  The Company had $824,000 and $523,000 in accounts receivable due from its unconsolidated joint ventures as of June 30, 2014 and December 31, 2013.
	Included in the Company’s investments in unconsolidated joint ventures as of June 30, 2014 are eight 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 $94.5 million as of June 30, 2014.  The Company’s maximum exposure to loss as a result of its involvement with these VIEs is estimated to be approximately $110.8 million, which includes the Company’s current investment and estimated future funding commitments of approximately $16.3 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 Company's unconsolidated joint ventures as of June 30, 2014: (dollars in thousands)
		Number of		Company's				Company's			Property Debt
		Apartment Units		Effective				Carrying				Maturity	Interest
	Entity / Property Name	or Square Feet (sf)		Ownership % (a)				Amount			Balance	Date	Rate
	Multi-family
	Marbella RoseGarden, L.L.C./ Marbella  (b)	412	units	24.27	%		$	15,782		$	95,000	5/1/18	4.99	%
	RoseGarden Monaco Holdings, L.L.C./ Monaco (North and South)  (b)	523	units	15.00	%			2,686			165,000	2/1/21	4.19	%
	Rosewood Lafayette Holdings, L.L.C./ Highlands at Morristown Station  (b)	217	units	25.00	%			496			39,021	7/1/15	4.00	%
	PruRose Port Imperial South 15, LLC /RiversEdge at Port Imperial (b)	236	units	50.00	%			-			57,500	9/1/20	4.32	%
	Rosewood Morristown, L.L.C. / Metropolitan at 40 Park  (c) (d)	130	units	12.50	%			6,257			46,217	(e)	(e)
	Overlook Ridge JV, L.L.C./ Quarrystone  (b) (f)	251	units	25.00	%			-			75,366	(g)	(g)
	Overlook Ridge JV 2C/3B, L.L.C./Overlook Ridge 2C & 3B  (b)	371	units	25.00	%			-			41,006	12/28/15	L+2.50	%	(h)
	PruRose Riverwalk G, L.L.C./ RiverTrace at Port Imperial   (b)	316	units	25.00	%			1,950			76,334	7/15/21	6.00	%	(i)
	Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C)  (b)	355	units	7.50	%			-			72,619	6/27/16	L+2.10	%	(j)
	Crystal House Apartments Investors LLC / Crystal House  (k)	828	units	25.00	%			26,458			165,000	3/19/20	3.17	%
	Portside Master Company, L.L.C./ Portside at Pier One - Bldg 7  (b)	176	units	38.25	%			2,655			20,007	12/5/15	L+2.50	%	(l)
	PruRose Port Imperial South 13, LLC / Port Imperial Bldg 13  (b)	280	units	20.00	%			1,685			26,097	6/27/16	L+2.15	%	(m)
	Roseland/Port Imperial Partners, L.P./ Riverwalk C  (b) (n)	363	units	20.00	%			1,926			-	-	-
	RoseGarden Marbella South, L.L.C./ Marbella II  (b)	311	units	24.27	%			8,580			12,503	3/30/17	L+2.25	%	(o)
	Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) (b)	227	units	7.50	%			-			22,157	1/25/17	L+2.10	%	(p)
	Riverpark at Harrison I, L.L.C./ Riverpark at Harrison	141	units	36.00	%			4,247			13,370	6/27/16	L+2.35	%	(q)
	Capitol Place Mezz LLC / Station Townhouses	377	units	50.00	%			47,978			45,039	7/1/33	4.82	%	(r)
	Harborside Unit A Urban Renewal, L.L.C. / URL Harborside	763	units	85.00	%			22,150			-	-	-
	Overlook Ridge, L.L.C./Overlook Ridge Land	896	potential units	50.00	%			-			16,940	3/2/15	L+3.50	%
	RoseGarden Monaco, L.L.C./ San Remo Land	300	potential units	41.67	%			1,255			-	-	-
	Grand Jersey Waterfront URA, L.L.C./ Liberty Landing	1,000	potential units	50.00	%			337			-	-	-
	Office
	Red Bank Corporate Plaza, L.L.C./ Red Bank	92,878	sf	50.00	%			3,771			16,240	5/17/16	L+3.00	%	(s)
	12 Vreeland Associates, L.L.C./ 12 Vreeland Road	139,750	sf	50.00	%			5,658			14,717	7/1/23	2.87	%
	BNES Associates III / Offices at Crystal Lake	106,345	sf	31.25	%			1,899			7,057	11/1/23	4.76	%
	Hillsborough 206 Holdings, L.L.C./ Hillsborough 206	160,000	sf	50.00	%			1,962			-	-	-
	KPG-P 100 IMW JV, LLC / 100 Independence Mall West	339,615	sf	33.33	%			751			61,500	9/9/16	L+7.00	%	(t)
	Keystone-Penn	1,842,820	sf	(u)				-			200,601	(v)	(v)
	Keystone-TriState	1,266,384	sf	(u)				-			118,890	(w)	(w)
	KPG-MCG Curtis JV, L.L.C./ Curtis Center	885,000	sf	50.00	%			2,187			-	-	-
	Curtis Center TIC I and II LLC / Curtis Center	n/a		(x)				61,296			-	-	-
	Other
	Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations)	1,225,000	sf	50.00	%			3,848			-	-	-
	Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial  (b)	30,745	sf	20.00	%			1,883			-	-	-
	South Pier at Harborside / Hyatt Regency Jersey City on the Hudson	350	rooms	50.00	%			-			66,799	(y)	(y)
	Stamford SM LLC / Senior Mezzanine Loan  (z)	n/a	n/a	80.00	%			37,418			-	-	-
	Other (aa)							751			-	-	-
	Totals:						$	265,866		$	1,474,980
		(a)		Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.
		(b)		The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the Company is not expected to meaningfully participate in the venture's cash flows in the near term.
		(c)		Through the joint venture, the Company also owns a 12.5 percent interest in a 50,973 square feet of retail building ("Shops at 40 Park") and a 25 percent interest in a to-be-built 59-unit, five story multi-family rental development property ("Lofts at 40 Park").
		(d)		The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the payment of the outstanding balance remaining on a note ($975 as of June 30, 2014), and is not expected to meaningfully participate in the venture's cash flows in the near term.
		(e)		Property debt balance consists of: (i) a loan, collateralized by the Metropolitan at 40 Park, has a balance of $38,600, bears interest at 3.25 percent, matures in September 2020 and is interest only through September 2015; (ii) loan, collateralized by the Shops at 40 Park, has a balance of $6,500, bears interest at 3.63 percent, matures in August 2018 and is interest-only through July 2015; and (iii) the loan, collateralized by the Lofts at 40 Park, has a balance of $1,117, bears interest at LIBOR plus 250 basis points and matures in September 2015.  The Shops at 40 Park mortgage loan also provides for additional borrowing proceeds of $1 million based on certain preferred thresholds being achieved.
		(f)		Through the joint venture, the Company also owns a 50 percent interest in a land parcel ("Overlook Phase III Land") that can accommodate the development of approximately 240 apartment units.
		(g)		Property debt balance consists of: (i) a  loan, collateralized by the Overlook Phase III Land, has a balance of $5,709, bears interest at a rate of LIBOR plus 250 basis points, matures in April 2015 and, subject to certain conditions, provides for a one-year extension option with a fee of 25 basis points, and (ii) the senior loan, collateralized by the Quarrystone property, has a balance of $52,657, bears interest at LIBOR plus 200 basis, matures in March 2016 and (iii) the junior loan, with a balance of $17,000, bears interest at LIBOR plus 90 basis points, matures in March 2016 and is collateralized by a $17,000 letter of credit provided by an affiliate of the partner.
		(h)		The construction loan has a maximum borrowing amount of $55,500 and provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points each.  The joint venture has a swap agreement that fixes the all-in rate to 3.0875 percent per annum on an initial notional amount of $1,840, increasing to $50,800, for the period from September 3, 2013 to November 2, 2015.
		(i)		The construction loan has a maximum borrowing amount of $83,113.
		(j)		The construction loan has a maximum borrowing amount of $91,000 and provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.
		(k)		The Company also owns a 50 percent interest in a vacant land to accommodate the development of approximately 295 additional units of which 252 are currently approved.
		(l)		The construction loan has a maximum borrowing amount of $42,500 and provides, subject to certain conditions, two two-year extension options with a fee of 12.5 basis points for the first two-year extension and 25 basis points for the second two-year extension.
		(m)		The construction loan has a maximum borrowing amount of $73,350 and provides, subject to certain conditions, one-year extension option followed by a six-month extension option with a fee of 25 basis points each. The joint venture has a swap agreement that fixes the all-in rate to 2.79 percent per annum on an initial notional amount of $1,620, increasing to $69,500 for the period from July 1, 2013 to January 1, 2016.
		(n)		The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J ("Port Imperial North Land") that can accommodate the development of 836 apartment units.
	(o)		The construction loan has a maximum borrowing amount of $77,400 and provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points for each year.
	(p)		The construction loan has a maximum borrowing amount of $57,000 and provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.
	(q)		The construction loan has a maximum borrowing amount of $23,400 and provides, subject to certain conditions, two one-year extension options with a fee of 20 basis points for each year.
	(r)		The construction loan has a maximum borrowing amount of $100,700 with amortization starting in August 2017.
	(s)		The joint venture has a swap agreement that fixes the all-in rate to 3.99375 percent per annum on an initial notional amount of $13,650 and then adjusting in accordance with an amortization schedule, which is effective from October 17, 2011 through loan maturity.
	(t)		The mortgage loan has two one-year extension options, subject to certain conditions, and includes a $25 million construction reserve.
	(u)		The Company’s equity interests in the joint ventures will be subordinated to affiliates of the Keystone Property Group receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a ten percent IRR on its subordinate equity and then all profit will be split equally.
	(v)		Principal balance of $127,600 bears interest at 5.114 percent and matures in August 27, 2023; principal balance of $62,577 bears interest at rates ranging from LIBOR+5.0 percent to LIBOR+5.75 percent and matures in August 27, 2016; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures in August 27, 2015.
	(w)		Principal balance of $77,650 bears interest at rates ranging from 4.888 percent to 4.93 percent and matures on July 6, 2024; principal balance of $41,240 bears interest at LIBOR+4.95 percent and matures on July 1, 2017.
	(x)		Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12.  See discussion in Recent Transactions following in this footnote.
	(y)		Balance includes: (i) mortgage loan, collateralized by the hotel property, has a balance of $62,175, bears interest at 6.15 percent and matures in November 2016, and (ii) loan with a balance of $4.6 million, bears interest at fixed rates ranging from 6.09 percent to 6.62 percent and matures in August 1, 2020.  The Company posted a $4.6 million letter of credit in support of this loan, half of which is indemnified by the partner.
	(z)		The joint venture owns a senior mezzanine loan  ("Mezz Loan") with a face value of $50,000 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.  The interest-only Mezz Loan has a carrying value of $46,505 and is subject to an agreement that provides, subject to certain conditions, for the payment of principal proceeds above $47,000 to another party. The Mezz loan bears interest at LIBOR plus 325 basis points and matures in August 2014.  The joint venture is evaluating its option regarding its investment as the loan approaches maturity.
	(aa)		The Company owns other interests in various unconsolidated joint ventures, including interests in assets previously owned and interest in ventures whose businesses are related to its core operations. These ventures are not expected to significantly impact the Company's operations in the near term.
The following is a summary of the financial position of the unconsolidated joint ventures in which the Company had investment interests as of June 30, 2014 and December 31, 2013: (dollars in thousands)
			June 30,			December 31,
			2014			2013
Assets:
Rental property, net		$	1,202,271		$	755,049
Loan receivable			46,505			45,050
Other assets			486,239			582,990
Total assets		$	1,735,015		$	1,383,089
Liabilities and partners'/
members' capital:
Mortgages and loans payable		$	844,476		$	637,709
Other liabilities			211,959			87,231
Partners'/members' capital			678,580			658,149
Total liabilities and
partners'/members' capital		$	1,735,015		$	1,383,089
The following is a summary of the Company’s investments in unconsolidated joint ventures as of June 30, 2014 and December 31, 2013:  (dollars in thousands)
		June 30,			December 31,
Entity / Property Name		2014			2013
Marbella RoseGarden, L.L.C./ Marbella	$	15,782		$	15,797
RoseGarden Monaco Holdings, L.L.C./ Monaco (North and South)		2,686			3,201
Rosewood Lafayette Holdings, L.L.C./ Highlands at Morristown Station		496			857
PruRose Port Imperial South 15, LLC /RiversEdge at Port Imperial		-			-
Rosewood Morristown, L.L.C. / Metropolitan at 40 Park		6,257			6,455
Overlook Ridge JV, L.L.C./ Quarrystone		-			-
Overlook Ridge JV 2C/3B, L.L.C./Overlook Ridge 2C & 3B		-			-
PruRose Riverwalk G, L.L.C./ RiverTrace at Port Imperial		1,950			3,117
Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C)		-			203
Crystal House Apartments Investors LLC / Crystal House		26,458			26,838
Portside Master Company, L.L.C./ Portside at Pier One - Bldg 7		2,655			3,207
PruRose Port Imperial South 13, LLC / Port Imperial Bldg 13		1,685			2,206
Roseland/Port Imperial Partners, L.P./ Riverwalk C		1,926			2,068
RoseGarden Marbella South, L.L.C./ Marbella II		8,580			7,567
Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B)		-			24
Riverpark at Harrison I, L.L.C./ Riverpark at Harrison		4,247			3,655
Capitol Place Mezz LLC / Station Townhouses		47,978			46,628
Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (a)		22,150			-
Overlook Ridge, L.L.C./Overlook Ridge Land		-			-
RoseGarden Monaco, L.L.C./ San Remo Land		1,255			1,224
Grand Jersey Waterfront URA, L.L.C./ Liberty Landing		337			337
Red Bank Corporate Plaza, L.L.C./ Red Bank		3,771			4,046
12 Vreeland Associates, L.L.C./ 12 Vreeland Road		5,658			5,514
BNES Associates III / Offices at Crystal Lake		1,899			1,753
Hillsborough 206 Holdings, L.L.C./ Hillsborough 206		1,962			1,962
KPG-P 100 IMW JV, LLC / 100 Independence Mall West		751			1,887
Keystone-Penn		-			-
Keystone-TriState		-			-
KPG-MCG Curtis JV, L.L.C./ Curtis Center (a)		2,187			-
Curtis Center TIC I and II LLC / Curtis Center (b)		61,296			-
Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations)		3,848			3,702
Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial		1,883			1,930
South Pier at Harborside / Hyatt Regency Jersey City on the Hudson (c)		-			-
Stamford SM LLC / Senior Mezzanine Loan		37,418			36,258
Other		751			693
Company's investment in unconsolidated joint ventures	$	265,866		$	181,129
(a)See discussion in Recent Transactions following in this footnote.
(b)Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12.  See discussion in Recent Transactions following in this footnote.
(c)The negative investment balance for this joint venture of $710 and $1,706 as of June 30, 2014 and December 31, 2013, respectively, were included in accounts payable, accrued expenses and other liabilities.
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 six months ended June 30, 2014 and 2013: (dollars in thousands)
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
Total revenues	$	113,118		$	91,274		$	144,111		$	103,693
Operating and other expenses		-96,605			-81,321			-114,958			-89,268
Depreciation and amortization		-8,213			-10,083			-16,581			-13,174
Interest expense		-8,786			-3,310			-15,127			-5,322
Net income (loss)	$	-486		$	-3,440		$	-2,555		$	-4,071
The following is a summary of the Company’s equity in earnings (loss) of unconsolidated joint ventures for the three and six months ended June 30, 2014 and 2013: (dollars in thousands)
		Three Months Ended						Six Months Ended
		June 30,						June 30,
Entity / Property Name		2014			2013			2014			2013
Marbella RoseGarden, L.L.C./ Marbella	$	-9		$	-165		$	-15		$	-276
RoseGarden Monaco Holdings, L.L.C./ Monaco (North and South)		-238			-423			-515			-822
Rosewood Lafayette Holdings, L.L.C./ Highlands at Morristown Station		-203			-284			-419			-574
PruRose Port Imperial South 15, LLC /RiversEdge at Port Imperial		-			-			-			-606
Rosewood Morristown, L.L.C. / Metropolitan at 40 Park		-76			-117			-174			-241
Overlook Ridge JV, L.L.C./ Quarrystone		-			-			-			-
Overlook Ridge JV 2C/3B, L.L.C./Overlook Ridge 2C & 3B		-			224			62			151
PruRose Riverwalk G, L.L.C./ RiverTrace at Port Imperial		-613			-192			-1,151			-378
Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C)		-91			-82			-203			-168
Crystal House Apartments Investors LLC / Crystal House		53			-1,535			-274			-1,522
Portside Master Company, L.L.C./ Portside at Pier One - Bldg 7		-220			-68			-434			-113
PruRose Port Imperial South 13, LLC / Port Imperial Bldg 13		-213			-145			-418			-278
Roseland/Port Imperial Partners, L.P./ Riverwalk C		-180			-			-345			-
RoseGarden Marbella South, L.L.C./ Marbella II		-			-19			-			-37
Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B)		-			-34			-15			-63
Riverpark at Harrison I, L.L.C./ Riverpark at Harrison		-			-			-			-
Capitol Place Mezz LLC / Station Townhouses		-			-			-			-
Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (a)		-212			-			-212			-
Overlook Ridge, L.L.C./Overlook Ridge Land		-213			-			-259			-
RoseGarden Monaco, L.L.C./ San Remo Land		-			-			-			-
Grand Jersey Waterfront URA, L.L.C./ Liberty Landing		-16			-			-54			-
Red Bank Corporate Plaza, L.L.C./ Red Bank		106			106			205			207
12 Vreeland Associates, L.L.C./ 12 Vreeland Road		54			116			144			24
BNES Associates III / Offices at Crystal Lake		110			-2			147			-71
Hillsborough 206 Holdings, L.L.C./ Hillsborough 206		-			-			-5			-
KPG-P 100 IMW JV, LLC / 100 Independence Mall West		-483			-			-1,136			-
Keystone-Penn		-			-			-			-
Keystone-TriState		-			-			-			-
KPG-MCG Curtis JV, L.L.C./ TIC I and II LLC / Curtis Center (b)		251			-			251			-
Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations)		44			19			146			28
Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial		-23			-83			-47			-132
South Pier at Harborside / Hyatt Regency Jersey City on the Hudson		892			1,056			1,290			545
Stamford SM LLC / Senior Mezzanine Loan		928			897			1,844			1,782
Other		795			651			795			714
Company's equity in earnings (loss) of unconsolidated joint ventures	$	443		$	-80		$	-792		$	-1,830
(a)See discussion in Recent Transactions following in this footnote.
(b)Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12.  See discussion in Recent Transactions following in this footnote.
Recent Transactions
Harborside Unit A Urban Renewal, L.L.C.
Pursuant to a developer agreement entered into in December 2011, on May 21, 2014, the Company entered into a joint venture agreement with Ironstate Harborside-A LLC (“ISA”) to form Harborside Unit A Urban Renewal, L.L.C. (“URL-Harborside”), a newly-formed joint venture that will develop, own and operate a high-rise tower of approximately 763 multi-family apartment units above a parking pedestal to be located on land contributed by the Company at its Harborside complex in Jersey City, New Jersey (the “URL Project”).  The construction of the URL Project is estimated to cost a total of approximately $320 million and is projected to be ready for occupancy by the fourth quarter of 2016.   The URL Project has been awarded up to $33 million in future tax credits (“URL Tax Credits”), subject to certain conditions, from the New Jersey Economic Development Authority.  The venture has an agreement to sell these credits, subject to certain conditions.  The Company currently expects that it will fund approximately $88 million of the development costs of the project net of future financing.
The Company owns an 85 percent interest in URL-Harborside and the remaining interest owned by ISA, with shared control over major decisions such as, approval of budgets, property financings and leasing guidelines. Upon entering into the joint venture, the Company’s initial contribution was $30.6 million, which included a capital credit of $30 per approved developable square foot for its contributed land aggregating approximately $20.6 million with the balance consisting of previously incurred development costs, and ISA’s initial contribution was approximately $5.4 million.  Included in the Company’s investment in the joint venture is the land contribution with a carrying amount of $5.5 million.
In general, the operating agreement of URL-Harborside provides that net operating cash flows are distributed first, to the members in respect of preferred return, as defined, until each member shall have received payment of the accrued and unpaid preferred return; and, thereafter, to each member as follows: 75 percent to the Company and 25 percent to ISA.
Net cash flows from a capital event are distributed first, to the members in respect of preferred return, as defined, until each member shall have received payment of the accrued and unpaid preferred return; second, to the members pro rata based upon the ratio that their respective capital accounts bear to each other until each member shall have received their respective net capital, as defined; third, to the members at the rate of 75 percent to the Company and 25 percent to ISA until the Company shall have received distributions equal to an 18 percent internal rate of return on the Company’s capital contributions; and, thereafter, to the members, at the rate of 65 percent to the Company and 35 percent to ISA.
KPG-MCG Curtis JV, LLC / Curtis Center TIC I and II, L.L.C.
On June 6, 2014, the Company and an affiliate of Keystone Property Group (“KPG”) acquired 50 percent tenants-in-common interests each for $62.5 million in Curtis Center, an 885,000 square foot commercial office property  located at 601 Walnut Street in Philadelphia, Pennsylvania (the “Curtis Center Property”), which amounted to a total purchase of  approximately $125.0 million for the property.  In connection with the transaction, the Company provided short-term loans to KPG affiliates, as follows:  a 90-day, $52.3 million loan which bears interest at an annual rate of 3.5 percent payable at maturity, which is collateralized by the KPG affiliates’ interest in the Curtis Center Property; and a 90-day, $10 million loan which also bears interest at an annual rate of 3.5 percent payable at maturity.  The investments were funded by the Company primarily through borrowing under its revolving credit facility.  The venture plans to reposition the property into a mixed-use environment by converting a portion of existing office space into multi-family rental apartments.
Simultaneous with the acquisition of the Curtis Center Property, the Company and a KPG affiliate formed a new joint venture named KPG-MCG Curtis JV, LLC (the “Curtis Center JV”), which master leased the Curtis Center Property from the acquisition entities for approximately 29 years at market-based terms.  The Company and the KPG affiliate both own a 50 percent interest in the Curtis Center JV, with shared control over major decisions.
In general, the operating agreement of the Curtis Center JV provides that net cash flows from operations and capital events are distributed first, to the members, pro rata in proportion to their unreturned capital contributions, until each member’s unreturned capital contributions have been reduced to zero; and, thereafter, to each member, pro rata, in accordance with their percentage interests.

Deferred_Charges_Goodwill_And_

Deferred Charges, Goodwill And Other Assets	6 Months Ended
	Jun. 30, 2014
Deferred Charges, Goodwill And Other Assets [Abstract]	'
Deferred Charges, Goodwill And Other Assets	'
	5.    DEFERRED CHARGES, GOODWILL AND OTHER ASSETS
			June 30,		December 31,
	(dollars in thousands)		2014		2013
	Deferred leasing costs	$	227,930	$	258,648
	Deferred financing costs		21,916		25,366
			249,846		284,014
	Accumulated amortization		-112,249		-131,669
	Deferred charges, net		137,597		152,345
	Notes receivable (1)		83,889		21,986
	In-place lease values, related intangibles and other assets, net		9,515		13,659
	Goodwill		2,945		2,945
	Prepaid expenses and other assets, net		32,814		27,584
	Total deferred charges, goodwill and other assets	$	266,760	$	218,519
	(1)Includes: a mortgage receivable for $10.4 million which bears interest at LIBOR plus six percent; a note receivable for $7.8 million which bears interest at eight percent; notes receivable for $62.3 million which bear interest at 3.5 percent (See Note 4: Unconsolidated joint ventures – Recent Transactions); and an interest-free note receivable with a net present value of $3.4 million as of June 30, 2014.  .

Restricted_Cash

Restricted Cash	6 Months Ended
	Jun. 30, 2014
Restricted Cash [Abstract]	'
Restricted Cash	'
	6.    RESTRICTED CASH
	Restricted cash generally includes tenant and resident 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)
			June 30,		December 31,
			2014		2013
	Security deposits	$	8,782	$	8,534
	Escrow and other reserve funds		17,623		11,260
	Total restricted cash	$	26,405	$	19,794

Discontinued_Operations

Discontinued Operations	6 Months Ended
	Jun. 30, 2014
Discontinued Operations [Abstract]	'
Discontinued Operations	'
	7.    DISCONTINUED OPERATIONS
	On January 1, 2014, the Company early adopted the new discontinued operations standard and as the properties sold in the six months ended June 30, 2014 will not represent a strategic shift (as the Company is not entirely exiting markets or property types), they have not been reflected as part of discontinued operations.  See Note 3: Real Estate Transactions – Sales.
	The Company disposed of 24 office properties located in New York, New Jersey, Pennsylvania and Connecticut aggregating 3 million square feet and three developable land parcels for total net sales proceeds of approximately $390.6 million during the year ended December 31, 2013.  The Company has presented these properties as discontinued operations in its statements of operations for the three and six months ended June 30, 2013.
	The following table summarizes income from discontinued operations for the three and six months ended June 30, 2013: (dollars in thousands)
		Three Months Ended		Six Months Ended
			June 30,	June 30,
			2013		2013
	Total revenues	$	12,333	$	27,205
	Operating and other expenses		-4,778		-10,982
	Depreciation and amortization		-2,989		-6,442
	Interest expense		-36		-118
	Income from discontinued operations		4,530		9,663
	Loss from early extinguishment of debt		-703		-703
	Impairments (1)		-23,851		-23,851
	Realized gains on disposition of rental property		37,609		37,609
	Realized gains (losses) and unrealized losses on
	disposition of rental property and impairments, net		13,758		13,758
	Total discontinued operations	$	17,585	$	22,718
	(1)Represents impairment charges recorded on certain properties prior to their sale.

Senior_Unsecured_Notes

Senior Unsecured Notes	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Senior Unsecured Notes	'
	8.    SENIOR UNSECURED NOTES
	A summary of the Company’s senior unsecured notes as of June 30, 2014 and December 31, 2013 is as follows:  (dollars in thousands)
			June 30,		December 31,	Effective
			2014		2013	Rate (1)
	5.125% Senior Unsecured Notes, due February 15, 2014 (2)		-	$	200,030	5.110	%
	5.125% Senior Unsecured Notes, due January 15, 2015	$	149,948		149,902	5.297	%
	5.800% Senior Unsecured Notes, due January 15, 2016		200,123		200,161	5.806	%
	2.500% Senior Unsecured Notes, due  December 15, 2017		249,003		248,855	2.803	%
	7.750% Senior Unsecured Notes, due August 15, 2019		248,906		248,799	8.017	%
	4.500% Senior Unsecured Notes, due April 18, 2022		299,535		299,505	4.612	%
	3.150% Senior Unsecured Notes, due May 15, 2023		269,626		269,323	3.517	%
	Total senior unsecured notes	$	1,417,141	$	1,616,575
	(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)On February 17, 2014, the Company repaid these notes at their maturity using available cash and borrowings on the Company’s unsecured revolving credit facility.
	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.   The Company was in compliance with its debt covenants as of June 30, 2014.

Unsecured_Revolving_Credit_Fac

Unsecured Revolving Credit Facility	6 Months Ended
	Jun. 30, 2014
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 (60 percent), the maximum amount of secured indebtedness (40 percent), the minimum amount of fixed charge coverage (1.5 times), the maximum amount of unsecured indebtedness (60 percent), the minimum amount of unencumbered property interest coverage (2.0 times) and certain investment limitations (generally 15 percent of total capitalization).    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 Company was in compliance with its debt covenants as of June 30, 2014.
	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 June 30, 2014, the Company had outstanding borrowings of $56 million under its unsecured revolving credit facility and no outstanding borrowings as of December 31, 2013.
	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 June 30, 2014 and December 31, 2013, the Company had no outstanding borrowings under the Money Market Loan.

Mortgages_Loans_Payable_And_Ot

Mortgages, Loans Payable And Other Obligations	6 Months Ended
	Jun. 30, 2014
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 June 30, 2014,  27 of the Company’s properties, with a total book value of approximately $879 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.  Except as noted below, the Company was in compliance with its debt covenants as of June 30, 2014.
	A summary of the Company’s mortgages, loans payable and other obligations as of June 30, 2014 and December 31, 2013 is as follows: (dollars in thousands)
				Effective			June 30,		December 31,
	Property Name	Lender		Rate (a)			2014		2013	Maturity
	6301 Ivy Lane (b)	RGA Reinsurance Company		5.520	%	$	-	$	5,447	-
	395 West Passaic (c)	State Farm Life Insurance Co.		6.004	%		-		9,719	-
	35 Waterview Boulevard (d)	Wells Fargo CMBS		6.348	%		-		18,417	-
	233 Canoe Brook Road (e)	The Provident Bank		4.375	%		-		3,877	-
	6 Becker, 85 Livingston,	Wells Fargo CMBS		10.220	%		64,829		64,233	8/11/2014 (l)
	75 Livingston &
	20 Waterview (f)
	4 Sylvan	Wells Fargo CMBS		10.190	%		14,565		14,538	8/11/2014 (l)
	10 Independence (g)	Wells Fargo CMBS		12.440	%		16,850		16,638	8/11/14
	Port Imperial South 4/5	Wells Fargo Bank N.A.	LIBOR+3.50		%		36,950		36,950	8/30/14
	9200 Edmonston Road (h)	Principal Commercial Funding L.L.C.		5.534	%		4,026		4,115	5/1/15
	Port Imperial South	Wells Fargo Bank N.A.	LIBOR+1.75		%		43,697		43,278	9/19/15
	4 Becker	Wells Fargo CMBS		9.550	%		39,108		38,820	5/11/16
	5 Becker (i)	Wells Fargo CMBS		12.830	%		13,467		13,092	5/11/16
	210 Clay	Wells Fargo CMBS		13.420	%		13,039		12,767	5/11/16
	Various (j)	Prudential Insurance		6.332	%		146,532		147,477	1/15/17
	150 Main St.	Webster Bank	LIBOR+2.35		%		217		-	3/30/17
	23 Main Street	JPMorgan CMBS		5.587	%		29,529		29,843	9/1/18
	Harborside Plaza 5	The Northwestern Mutual Life		6.842	%		223,381		225,139	11/1/18
		Insurance Co. & New York Life
		Insurance Co.
	100 Walnut Avenue	Guardian Life Insurance Co.		7.311	%		18,669		18,792	2/1/19
	One River Center (k)	Guardian Life Insurance Co.		7.311	%		42,768		43,049	2/1/19
	Park Square	Wells Fargo Bank N.A.	LIBOR+1.75		%		27,500		-	4/10/19
	Total mortgages, loans payable and other obligations					$	735,127	$	746,191
		(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)		On April 1, 2014, the Company repaid the mortgage loan at par, using available cash.
		(c)		On May 1, 2014, the Company repaid the mortgage loan at par, using available cash.
		(d)		On May 12, 2014, the Company repaid the mortgage loan at par, using borrowings on the Company’s unsecured revolving credit facility.
		(e)		On April 30, 2014, the Company repaid the mortgage loan at par, using available cash.
		(f)		Mortgage is cross collateralized by the four properties.
		(g)		The Company is negotiating a deed-in-lieu of foreclosure in satisfaction of this mortgage loan.
		(h)		The mortgage loan originally matured on May 1, 2013.  The maturity date was extended until May 1, 2015 with the same interest rate.  Excess cash flow, as defined, is being held by the lender for re-leasing costs.  The deed for the property was placed in escrow and is available to the lender in the event of default or non-payment at maturity.
		(i)		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 deed-in-lieu of foreclosure and began remitting available cash flow to the lender effective August 2013.
		(j)		Mortgage is cross collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.
		(k)		Mortgage is collateralized by the three properties comprising One River Center.
	(l)The Company has begun discussions with the lender to extend the maturity date and modify the loan terms.
	CASH PAID FOR INTEREST AND INTEREST CAPITALIZED
	Cash paid for interest for the six months ended June 30, 2014 and 2013 was $61,999,000 and $60,838,000, respectively.  Interest capitalized by the Company for the six months ended June 30, 2014 and 2013 was  $6,493,000 and $6,748,000, respectively (of which these amounts included $1,953,000 and $584,000 for the six months ended June 30, 2014 and 2013, respectively, for interest capitalized on the Company’s investments in unconsolidated joint ventures which were substantially in development).
	SUMMARY OF INDEBTEDNESS
	As of June 30, 2014, the Company’s total indebtedness of $2,208,268,000 (weighted average interest rate of 5.51 percent) was comprised of $164,363,000 of revolving credit facility borrowings and other variable rate mortgage debt (weighted average rate of 2.11 percent) and fixed rate debt and other obligations of $2,043,905,000 (weighted average rate of 5.78 percent).
	As of December 31, 2013, the Company’s total indebtedness of $2,362,766,000 (weighted average interest rate of 5.62 percent) was comprised of $80,228,000 of variable rate mortgage debt (weighted average rate of 2.74 percent) and fixed rate debt and other obligations of $2,282,538,000 (weighted average rate of 5.72 percent).

Employee_Benefit_401k_Plans_An

Employee Benefit 401(k) Plans And Deferred Retirement Compensation Agreements	6 Months Ended
	Jun. 30, 2014
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 June 30, 2014 and 2013 was $27,000 and $29,000,  respectively and $53,000 and $67,000 for the six months ended June 30, 2014 and 2013, 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 was to 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.  In connection with Messrs. Lefkowitz and Thomas’ separation from service to the Company effective March 31, 2014, the Company agreed to make cash payments totaling $1.2 million for all vested and unvested Stock Units and future cash contributions pursuant to their respective Deferred Retirement Compensation Agreements (see Note 13: Commitments and Contingencies – Departure of Executive Vice Presidents).  The annual contribution for Mr. Hersh will be in an amount of Stock Units equal to $500,000.  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, Mr. Hersh 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 to Mr. Hersh within 30 days after the earliest of any of the following triggering events: (a) Mr. Hersh’s death or disability; (b) the date of Mr. Hersh’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 Mr. Hersh’s employment agreement.  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.  The Company granted 36,218 Stock Units, including 836 additional Stock Units on accrued dividends, in the six months ended June 30, 2014.  Total expense recognized by the Company under the Deferred Retirement Compensation Agreements for the three months ended June 30, 2014 and 2013 was $142,000 and $153,000, respectively, and $1.3 million (see Note 13: Commitments and Contingencies – Departure of Executive Vice Presidents) and $341,000 for the six months ended June 30, 2014 and 2013, respectively.

Disclosure_Of_Fair_Value_Of_Fi

Disclosure Of Fair Value Of Financial Instruments	6 Months Ended
	Jun. 30, 2014
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 June 30, 2014 and December 31, 2013.  The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.
	Cash equivalents, receivables, notes receivables, accounts payable, and accrued expenses and other liabilities are carried at amounts which reasonably approximate their fair values as of June 30, 2014 and December 31, 2013.
	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 $2,261,079,000 and $2,407,802,000 as compared to the book value of approximately $2,208,268,000 and $2,362,766,000 as of June 30, 2014 and December 31, 2013, 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 June 30, 2014 and December 31, 2013.  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 June 30, 2014 and current estimates of fair value may differ significantly from the amounts presented herein.

Commitments_And_Contingencies

Commitments And Contingencies	6 Months Ended
	Jun. 30, 2014
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 and has tax abatement agreements on other properties, 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 annual 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 June 30, 2014 and 2013, respectively, and $495,000 and $495,000 for the six months ended June 30, 2014 and 2013, 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 annual 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 June 30, 2014 and 2013, respectively, and $1.7 million and $1.7 million for the six months ended June 30, 2014 and 2013, respectively.
	The agreement with the City of Weehawken for its Port Imperial 4/5 garage development project (acquired in the Roseland Transaction) was executed in March 2011 and has a term of five years beginning when the project is substantially complete, which occurred 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.
	The agreement with the City of Rahway for its Park Square multi-family rental property executed in 2009 provides that real estate taxes will be partially abated, on a declining scale, for four years from 2011 through 2015.
	At the conclusion of the above-referenced 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 June 30, 2014, are as follows: (dollars in thousands)
	Year		Amount
	July 1 through December 31, 2014	$	184
	2015		371
	2016		371
	2017		267
	2018		232
	2019 through 2084		15,819
	Total	$	17,244
	Ground lease expense incurred by the Company during the three months ended June 30, 2014 and 2013 amounted to $102,000 and $102,000, respectively, and $203,000 and $203,000 for the six months ended June 30, 2014 and 2013, respectively.
	ROSELAND CONTINGENT CONSIDERATION
	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 up to 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 period ended June 30, 2014, the Company recognized benefits of $380,000 related to a  decline in  fair value in the Earn Out liability, which is included in Interest and other investment income for the period.  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).  The measures of the Earn Out are based on significant inputs that are not observable in the market, which ASC 820 refers to as Level 3 inputs.  In addition to an appropriate discount rate, the key assumption affecting the valuation for the Roseland Assets component was the probability of occurrence of the payment events under the relevant provisions (management assumed between 92 and 99 percent for completion/start criteria and 50 percent for the tax credit/grant criteria in its initial valuation).  The valuation of the TRS component includes assumptions for the risk-free rate and various other factors (i.e., stock price, dividend levels and volatility) for the Company and the relevant peer group, as defined in the Earn Out agreement.  As a result of the achievement of certain of the defined criteria, the Company paid Roseland Partners $2.8 million on January 25, 2013 and $1.4 million on March 21, 2014 related to the Roseland Assets component of the Earn Out.  On July 18, 2014, the Company agreed to pay $1 million of the $3 million Earn Out related to certain tax credits/grants.  See Roseland Transaction Modifications following in this Note.  The Company previously recorded the $2.8 million payment of contingent consideration described above in the six-month period ended June 30, 2013 as a cash out flow from investing activity.   Management subsequently concluded that the payment should be appropriately classified as a cash out flow from financing activity and had reflected it as such in the annual financial statements for 2013.  The cash flow statement for the six month period ended June 30, 2013 presented herein has been revised to reflect this change in classification.   The Company has determined that the impact to the 2013 quarterly financial statements is not material.  The cash flow statements for the nine-month period ended September 30, 2013 will be revised in the future filing.
	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 Roseland Partners.  On July 18, 2014, the Company agreed to release all remaining escrow funds to Roseland Partners. See Roseland Transaction Modifications following in this Note.
	DEPARTURE OF EXECUTIVE VICE PRESIDENTS
	On March 3, 2014, the Company announced that Barry Lefkowitz was leaving his position as Executive Vice President and Chief Financial Officer of the Company effective March 31, 2014.  In connection with Mr. Lefkowitz’s departure, he will receive severance benefits payable pursuant to his employment agreement and outstanding equity compensation awards, including an aggregate cash payment of approximately $3.4 million, vesting of 11,457 newly issued shares of common stock of the Company, and vesting of 68,667 unvested shares of Restricted Stock Awards. The Company also will pay the premiums for the continuation of Mr. Lefkowitz’s existing health insurance for a period up to 48 months following March 31, 2014.
	Also on March 3, 2014, the Company announced that Roger W. Thomas was leaving his position as Executive Vice President, General Counsel and Secretary of the Company effective March 31, 2014.  In connection with Mr. Thomas’ departure, he will receive severance benefits payable pursuant to his employment agreement and outstanding equity compensation awards, including an aggregate cash payment of approximately $3.1 million, acceleration and discretionary full vesting of 33,605 newly issued shares of common stock of the Company, and vesting of 41,000 unvested shares of Restricted Stock Awards. The Company also will pay the premiums for the continuation of Mr. Thomas’ existing health insurance for a period of up to 48 months following September 30, 2014. Mr. Thomas will serve as a consultant to the Company from April 1, 2014 through September 30, 2014 for an aggregate cash compensation of $300,000.
	The Company’s total estimated costs for the departure of the two executive vice presidents of approximately $11 million during the six months ended June 30, 2014 was included in general and administration expense and accounts payable, accrued expenses and other liabilities as of June 30, 2014.
	ROSELAND TRANSACTION MODIFICATIONS
	On July 18, 2014, the Company entered into separation agreements (the “Separation Agreements”) with each of Bradford R. Klatt and Carl Goldberg, formerly principals of Roseland Partners who have served as co-presidents of Roseland Management since the Company acquired the Roseland Business in October 2012.  The Separation Agreements provide that the employment agreements of Messrs. Klatt and Goldberg terminate and that they shall resign as co-presidents of Roseland Management effective October 23, 2014 (the “Separation Date”).  Also on July 18, 2014, the Company amended its purchase agreement with the sellers of the Roseland Business (the “Roseland Amendment”) to modify certain terms of the Roseland Transaction in connection with the departures of Messrs. Klatt and Goldberg.  In addition, Mr. Goldberg entered into a consulting agreement with Roseland Management (the “Consulting Agreement”) pursuant to which he shall provide consulting services for a period of one year following the Separation Date for $400,000 payable in four, equal quarterly installments.
	Pursuant to the Separation Agreements, each of Messrs. Klatt and Goldberg shall receive a separation payment of $750,000 within five days following the Separation Date, and an additional payment of $500,000 in full satisfaction of any and all bonus payments under their respective employment agreements, which amount shall be paid six months after the date of their “separation from service” as defined in Section 409A of the Internal Revenue Code of 1986, as amended, and the Treasury Regulations and other guidance promulgated thereunder.  The Separation Agreements also contain customary mutual releases of claims and non-disparagement provisions, and Mr. Goldberg’s Consulting Agreement contains customary non-compete, confidentiality and indemnification covenants.  Mr. Goldberg’s Separation Agreement also provides that Roseland Management shall pay the premiums for the continuation of his existing health insurance for a period of one year from the Separation Date or until any earlier termination of his Consulting Agreement.
	The Roseland Amendment provides for the following material modifications to the Roseland Transaction:
	1.The non-competition covenants as they apply to Messrs. Klatt and Goldberg shall terminate on the Separation Date, and the non-competition covenants as they apply to Marshall Tycher shall be amended to permit Mr. Tycher to invest in certain future, family-controlled business ventures, subject to a right of first offer by the Company to make an investment of at least 50 percent in multi-family properties or projects covered by the right of first offer;
	2.The release to the sellers of the Roseland Business of all remaining funds held in the indemnity escrow account and the acceleration of the effectiveness of certain indemnity covenants to the Separation Date; and
	3. The payment of $1 million of the $3 million Earn Out related to certain tax credits/grants.
	JOINT VENTURE INTERESTS AGREEMENT
	On July 23, 2014, the Company entered into an agreement to acquire the equity interests of its joint venture partner in Overlook Ridge, L.L.C., Overlook Ridge JV, L.L.C. and Overlook Ridge JV 2C/3B, L.L.C. for approximately $16.6 million. As a result of this transaction, the Company will increase its ownership to 100 percent of developable land with proposed build-out of approximately 1,167 apartment homes in Malden, Massachusetts; and to 50 percent of its subordinated interests in two operating multi-family properties, also in Malden, Massachusetts.  The transaction is expected to close in the third quarter 2014.
	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 $123.5 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 current member of its Advisory Board), and the Cali Group (which includes John R. Cali, a former director and current member of its Advisory Board).  115 of the Company’s properties, with an aggregate net book value of approximately $1.4 billion, have lapsed restrictions and are subject to these conditions.
	In July 2012, the Company entered into a ground lease with Wegmans Food Markets, Inc. (“Wegmans”) at the Company’s 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 first quarter of 2015.  The Company expects to incur costs of approximately $15.7 million for the development of the site through the fourth quarter of 2015 (of which the Company has incurred $6.4 million through June 30, 2014).

Tenant_Leases

Tenant Leases	6 Months Ended
	Jun. 30, 2014
Tenant Leases [Abstract]	'
Tenant Leases	'
	14.  TENANT LEASES
	The Properties are leased to tenants under operating leases with various expiration dates through 2035.  Substantially all of the commercial 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 commercial operating leases at June 30, 2014 are as follows (dollars in thousands):
	Year		Amount
	July 1 through December 31, 2014	$	243,001
	2015		451,877
	2016		409,744
	2017		357,438
	2018		274,021
	2019 and thereafter		1,045,178
	Total	$	2,781,259
	Multi-family rental property residential leases are excluded from the above table as they generally expire within one year.

MackCali_Realty_Corporation_St

Mack-Cali Realty Corporation Stockholders' Equity	6 Months Ended
	Jun. 30, 2014
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 June 30, 2014 (none of which occurred in the six months ended June 30, 2014 and the year ended December 31, 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 approximately 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 SEC for the approximately 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 were granted under 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 June 30, 2014 and December 31, 2013, the stock options outstanding had a weighted average remaining contractual life of approximately 5.4 and 0.7 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, 2014	15,000		$	40.54		$	-
	Granted	5,000			21.25
	Lapsed or Cancelled	-10,000			38.07
	Outstanding at June 30, 2014  ($21.25 – $45.47)	10,000		$	33.36		$	-
	Options exercisable at June 30, 2014	5,000
	Available for grant at June 30, 2014	4,466,143
	The weighted average fair value of options granted during the six months ended June 30, 2014 was $1.71 per option. The fair value of each option grant is estimated on the date of grant using the Black-Scholes model.  The following weighted average assumptions are included in the Company’s fair value calculations of stock options granted during the six months ended June 30, 2014:
	Expected life (in years)		6
	Risk-free interest rate		1.50	%
	Volatility		20.26	%
	Dividend yield		5.65	%
	No cash was received from options exercised under all stock option plans for the three and six months ended June 30, 2014 and 2013, respectively.  The total intrinsic value of options exercised during each of the three and six months ended June 30, 2014 and 2013 was zero.  The Company has a policy of issuing new shares to satisfy stock option exercises.
	The Company recognized stock options expense of $1,000 and zero for the three months ended June 30, 2014 and 2013, respectively, and $2,000 and zero for the six months ended June 30, 2014 and 2013, 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 304,816 unvested shares were legally outstanding at June 30, 2014.  Of the Restricted Stock Awards issued to executive officers and senior management, 210,000 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 (“Performance Shares”), with the remaining based on time and service. These Performance Shares are not considered granted until the performance goals are set.  All currently outstanding and unvested Restricted Stock Awards provided to the officers and certain other employees were issued under the 2013 Plan and 2004 Plan.  Currently outstanding and unvested Restricted Stock Awards provided to directors were issued under the 2013 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 targets to be set by the Committee for each year.  As the Committee determined that the performance targets for the year ended December 31, 2013 were not satisfied, 63,933 shares due to vest on January 1, 2014 did not vest. Such shares may vest on any subsequent vesting date provided that the performance targets for the subsequent calendar year are met. Amounts recorded as compensation expense pertaining to these shares during the year ended December 31, 2013 were reversed.  In connection with the departure of two executive officers effective March 31, 2014, the Company agreed to grant and accelerate vesting of 109,667 shares of Restricted Stock Awards on April 1, 2014.
	Information regarding the Restricted Stock Awards grant activity is summarized below:
					Weighted-Average
					Grant – Date
		Shares			Fair Value
	Outstanding at January 1, 2014 (a)	153,560		$	25.20
	Granted (b)	208,589			20.83
	Vested	-183,214			22.37
	Forfeited	-119			26.36
	Outstanding at June 30, 2014	178,816		$	23.00
	(a)Includes 63,933 Performance Shares which were legally granted in 2013 for which the 2013 performance goals were not met, which may be earned if subsequent years’ performance goals are met.
	(b)Includes 42,000 Performance Shares which were legally granted in 2013 for which the 2014 performance goals were set by the Committee on March 31, 2014.  Also includes 87,734 shares which were additionally granted to two executive officers in connection with their departure affective March 31, 2014 and which vested on April 1, 2014.
	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 “TSR Performance Shares”) for those executive officers in place on such date, each TSR 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 TSR Performance Shares may vest commencing December 31, 2014, with the number of TSR Performance Shares scheduled to be granted annually over the next four years.  The vesting of each tranche of TSR 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 TSR Performance Shares in the year ended December 31, 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 TSR Performance Shares in accordance with the terms and conditions of the TSR-Based Awards.  In connection with the departure of two executive vice presidents effective March 31, 2014, the Company agreed to vest 357 TSR Performance Shares and to grant and accelerate the vesting of 528 TSR Performance Shares, for which the Company issued 45,062 shares of Common Stock on April 2, 2014.  See Note 13: Commitments and Contingencies – Departure of Executive Vice Presidents.
	As of June 30, 2014, the Company had $2.5 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 1.3 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 six months ended June 30, 2014 and 2013, 10,245 and 10,372 deferred stock units were earned, respectively.  As of June 30, 2014 and December 31, 2013, there were 148,208 and 136,440  deferred 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 June 30, 2014 and 2013 in accordance with ASC 260, Earning Per Share: (dollars in thousands, except per share amounts)
			Three Months Ended							Six Months Ended
			June 30,							June 30,
	Computation of Basic EPS		2014			2013				2014		2013
	Income from continuing operations	$	57,347		$	8,599			$	39,719	$	16,555
	Add: Noncontrolling interest in consolidated joint ventures		290			62				612		124
	Add (deduct):  Noncontrolling interest in Operating Partnership		-6,514			-1,048				-4,506		-2,021
	Income from continuing operations available to common shareholders		51,123			7,613				35,825		14,658
	Income from discontinued operations available to common shareholders		-			15,458				-		19,969
	Net income available to common shareholders	$	51,123		$	23,071			$	35,825	$	34,627
	Weighted average common shares		88,691			87,708				88,491		87,688
	Basic EPS:
	Income from continuing operations available to common shareholders	$	0.58		$	0.09			$	0.40	$	0.16
	Income from discontinued operations available to common
	shareholders		-			0.17				-		0.23
	Net income available to common shareholders	$	0.58		$	0.26			$	0.40	$	0.39
			Three Months Ended							Six Months Ended
		June 30,							June 30,
Computation of Diluted EPS		2014			2013				2014		2013
Income from continuing operations available to common shareholders	$	51,123		$	7,613			$	35,825	$	14,658
(Deduct) add: Noncontrolling interest in Operating Partnership		6,514			1,048				4,506		2,021
Income from continuing operations for diluted earnings per share		57,637			8,661				40,331		16,679
Income from discontinued operations for diluted earnings per share		-			17,585				-		22,718
Net income available to common shareholders	$	57,637		$	26,246			$	40,331	$	39,397
Weighted average common shares		100,023			99,895				99,964		99,892
Diluted EPS:
Income from continuing operations available to common shareholders	$	0.58		$	0.09			$	0.40	$	0.16
Income from discontinued operations available to common
shareholders		-			0.17				-		0.23
Net income available to common shareholders	$	0.58		$	0.26			$	0.40	$	0.39
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			Six Months Ended
	June 30,			June 30,
	2014	2013		2014	2013
Basic EPS shares	88,691	87,708		88,491	87,688
Add:   Operating Partnership – common units	11,302	12,072		11,444	12,085
Restricted Stock Awards	30	115		29	119
Diluted EPS Shares	100,023	99,895		99,964	99,892
Contingently issuable shares under the TSR Award plan were excluded from the denominator in 2014 and 2013 because the criteria had not been met for the periods ended June 30, 2014 and June 30, 2013.  Not included in the computations of diluted EPS were 10,000 and 15,000 stock options as such securities were anti-dilutive during the periods ended June 30, 2014 and 2013, respectively. Unvested restricted stock outstanding as of June 30, 2014 and 2013 were 304,816 and 352,358 shares, respectively.
Dividends declared per common share for the three month periods ended June 30, 2014 and 2013 was $0.15 and $0.30 per share, respectively.  Dividends declared per common share for the six month periods ended June 30, 2014 and 2013 was $0.45 and $0.60 per share, respectively.

Noncontrolling_Interests_In_Su

Noncontrolling Interests In Subsidiaries	6 Months Ended
	Jun. 30, 2014
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 six months ended June 30, 2014:
		Common
		Units
	Balance at January 1, 2014	11,864,775
	Redemption of common units for shares of common stock	-700,757
	Balance at June 30, 2014	11,164,018
	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 six months ended June 30, 2014, the Company has increased noncontrolling interests in the Operating Partnership and decreased additional paid-in capital in Mack-Cali Realty Corporation stockholders’ equity by approximately $0.2 million as of June 30, 2014.
	Noncontrolling Interest Ownership
	As of June 30, 2014 and December 31, 2013, the noncontrolling interest common unitholders owned 11.1 percent and 11.9 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 IRR of 10 percent per annum.

Segment_Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Segment Reporting	'
	17.   SEGMENT REPORTING
	The Company operates in three business segments: (i) commercial and other real estate, (ii) multi-family real estate, and (iii) multi-family services.  The Company provides leasing, property management, acquisition, development, construction and tenant-related services for its commercial and other real estate and multi-family real estate portfolio.  The Company’s multi‑family 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 six months ended June 30, 2014 and 2013.  The Company had no long lived assets in foreign locations as of June 30, 2014 and December 31, 2013. 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 each of its real estate segments (commercial and other, and multi-family) and from its multi-family services segment.
	Selected results of operations for the three and six months ended June 30, 2014 and 2013 and selected asset information as of June 30, 2014 and December 31, 2013 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				Multi-family				Corporate		Total
			& Other		Multi-family		Services				& Other (d)		Company
	Total revenues:
	Three months ended:
	30-Jun-14	$	150,877	$	6,329	$	7,403	(e)		$	-4,309	$	160,300
	30-Jun-13		155,249		3,655		6,394	(f)			3,048		168,346
	Six months ended:
	30-Jun-14		311,450		12,132		14,351	(g)			-8,037		329,896
	30-Jun-13		313,897		4,937		11,878	(h)			8,547		339,259
	Total operating and
	interest expenses (a):
	Three months ended:
	30-Jun-14	$	72,303	$	3,006	$	8,382			$	29,578	$	113,269
	30-Jun-13		65,889		1,568		7,657				38,888		114,002
	Six months ended:
	30-Jun-14		159,236		5,705		18,541				70,791		254,273
	30-Jun-13		136,282		2,104		15,132				78,343		231,861
	Equity in earnings (loss) of
	unconsolidated joint ventures:
	Three months ended:
	30-Jun-14	$	1,829	$	-2,255	$	869			$	-	$	443
	30-Jun-13		2,845		-2,925		-				-		-80
	Six months ended:
	30-Jun-14		2,817		-4,478		869				-		-792
	30-Jun-13		3,230		-5,060		-				-		-1,830
	Net operating income (loss) (b):
	Three months ended:
	30-Jun-14	$	80,403	$	1,068	$	-110			$	-33,887	$	47,474
	30-Jun-13		92,205		-838		-1,263				-35,840		54,264
	Six months ended:
	30-Jun-14		155,031		1,949		-3,321				-78,828		74,831
	30-Jun-13		180,845		-2,227		-3,254				-69,796		105,568
	Total assets:
	30-Jun-14	$	3,796,166	$	398,190	$	9,004			$	151,412	$	4,354,772
	31-Dec-13		3,886,574		377,237		10,488				241,029		4,515,328
	Total long-lived assets (c):
	30-Jun-14	$	3,421,351	$	277,734	$	3,923			$	3,479	$	3,706,487
	31-Dec-13		3,620,494		240,501		3,468				3,730		3,868,193
	Total investments in
	unconsolidated joint ventures:
	30-Jun-14	$	116,829	$	148,286	$	751			$	-	$	265,866
	31-Dec-13		53,160		127,276		693				-		181,129
	(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 and goodwill.
	(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 $935 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
	(f)Includes $571 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
	(g)Includes $1,800 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
	(h)Includes $767 of fees earned for this period from the multi-family 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				Six Months Ended
			June 30,				June 30,
			2014		2013		2014			2013
	Net operating income	$	47,474	$	54,264	$	74,831		$	105,568
	Less:
	Depreciation and amortization		-44,711		-45,665		-89,696			-89,013
	Realized gains and unrealized losses on disposition of
rental property, net		54,584		-		54,584			-
Income from continuing operations		57,347		8,599		39,719			16,555
Discontinued operations:
Income from discontinued operations		-		4,530		-			9,663
Loss from early extinguishment of debt		-		-703		-			-703
Realized gains and unrealized losses on disposition of
rental property, net		-		13,758		-			13,758
Total discontinued operations		-		17,585		-			22,718
Net income		57,347		26,184		39,719			39,273
Noncontrolling interest in consolidated joint ventures		290		62		612			124
Noncontrolling interest in Operating Partnership		-6,514		-1,048		-4,506			-2,021
Noncontrolling interest in discontinued operations		-		-2,127		-			-2,749
Net income available to common shareholders	$	51,123	$	23,071	$	35,825		$	34,627

Significant_Accounting_Policie1

Significant Accounting Policies (Policy)	6 Months Ended
	Jun. 30, 2014
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 $0.9 million and $0.9 million for the three months ended June 30, 2014 and 2013, respectively, and $1.8 and $1.7 million for the six months ended June 30, 2014 and 2013, respectively.  Included in total rental property is construction, tenant improvement and development in-progress of $44.2 million and $40.8 million as of June 30, 2014 and December 31, 2013, 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 substantial 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.
Rental Property Held For Sale	'
	Rental Property
	Held for Sale
	When 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.
	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 extent 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 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 $759,000 and $809,000 for the three months ended June 30, 2014 and 2013, respectively, $1,528,000 and $1,582,000 for the six months ended June 30, 2014 and 2013, respectively. If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (loss) from early extinguishment of debt.
Deferred Leasing Costs	'
	Deferred
	Leasing CostsCosts incurred in connection with commercial 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 related to commercial leases, which is capitalized and amortized, approximated $845,000 and $1,033,000 for the three months ended June 30, 2014 and 2013, respectively, and $1,876,000 and $2,206,000 for the six months ended June 30, 2014 and 2013, 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. Goodwill is allocated to various reporting units, as applicable.  Each of the Company’s segments consists of a reporting unit. Goodwill is not amortized.  Management performs an annual impairment test for goodwill during the fourth quarter and between annual tests, management evaluates the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable.  In its impairment tests of goodwill, management first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount.  If based on this assessment, management determines that the fair value of the reporting unit is not less than its carrying amount, then performing the additional two-step impairment test is unnecessary. If the carrying amount of goodwill exceeds its fair value, an impairment charge is recognized.
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.
	Parking income includes income from parking spaces leased to tenants and others.
	Other income includes income from tenants for additional services arranged for by the Company and income from tenants for early lease terminations.
	In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") 2014-09 Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"). ASU 2014-09 is a comprehensive new revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. In adopting ASU 2014-09, companies may use either a full retrospective or a modified retrospective approach. Additionally, this guidance requires improved disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.  ASU 2014-09 is effective for the first interim period within annual reporting periods beginning after December 15, 2016, and early adoption is not permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2014-09 will have on the Company’s financial position or results of operations.
Allowance For Doubtful Accounts	'
	Allowance for
	Doubtful AccountsManagement performs a detailed review of amounts due from tenants to determine if an allowance for doubtful accounts is required based on factors affecting the collectability of the accounts receivable balances. The factors considered by management in determining which individual tenant receivable balances, or aggregate receivable balances, require a collectability allowance include the age of the receivable, the tenant’s payment history, the nature of the charges, any communications regarding the charges and other related information. 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 (determined by excluding any net capital gains) to its shareholders.  If and to the extent the Company retains and does not distribute any net capital gains, the Company will be required to pay federal, state and local taxes on such net capital gains at the rate applicable to capital gains of a corporation.  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.   The Company has conducted business through its TRS entities for certain property management, development, construction and other related services, as well as to hold a joint venture interest in a hotel and other matters.  As of June 30, 2014, the Company had a deferred tax asset with a balance of approximately $14.1 million which has been fully reserved for through a valuation allowance.  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 June 30, 2014, the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2009 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 from continuing operations 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 June 30, 2014 represents dividends payable to common shareholders (88,730,563 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (11,161,018 common units) for all such holders of record as of July 3, 2014 with respect to the second quarter 2014.  The second quarter 2014 common stock dividends and common unit distributions of $0.15 per common share and unit were approved by the Board of Directors on May 30, 2014.  The common stock dividends and common unit distributions payable were paid on July 11, 2014.
	The dividends and distributions payable at December 31, 2013 represents dividends payable to common shareholders (87,928,002 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership (11,864,775 common units) for all such holders of record as of January 6, 2014 with respect to the fourth quarter 2013.  The fourth 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 December 10, 2013.  The common stock dividends and common unit distributions payable were paid on January 15, 2014.
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 at the grant date be amortized ratably into expense over the appropriate vesting period.  The Company recorded stock compensation expense of $877,000 and $461,000 for the three months ended June 30, 2014 and 2013, respectively, and $4,264,000 (which includes $3,203,000 related to the departure of executive vice presidents.  See Note 13: Commitments and Contingencies – Departure of Executive Vice Presidents); and $1,306,000 for the six months ended June 30, 2014 and 2013, 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 six months ended June 30, 2014 and 2013, and no accumulated other comprehensive income as of June 30, 2014 and December 31, 2013.
Fair Value Hierarchy	'
	Fair Value
	HierarchyThe standard Fair Value Measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources (observable inputs). The following summarizes the fair value hierarchy:
		·	Level 1: Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities;
		·	Level 2: Quoted prices for identical assets and liabilities in markets that are inactive, quoted prices for similar assets and liabilities inactive markets or financial instruments for which significant inputs are observable, either directly or indirectly, such as interest rates and yield curves that are observable at commonly quoted intervals and
		·	Level 3: Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.
	In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy.  In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety.  The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
Discontinued Operations	'
	Discontinued
	OperationsIn April 2014, the FASB issued guidance related to the reporting of discontinued operation and disclosures of disposals of components of an entity.  This guidance defines a discontinued operation as a component or group of components disposed or classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and final result; the guidance states that a strategic shift could include a disposal of a major geographical area of operations, a major line of business, a major equity method investment or other major parts of an entity.  The guidance also provides for additional disclosure requirements in connection with both discontinued operations and other dispositions not qualifying as discontinued operations.  The guidance will be effective for annual and interim periods beginning on or after December 15, 2014. The guidance applies prospectively to new disposals and new classifications of disposal groups as held for sale after the effective date.  All entities may early adopt the guidance for new disposals (or new classifications as held for sale) that have not been reported in financial statements previously issued or available for issuance.    The Company has elected to early adopt this standard effective with the interim period beginning January 1, 2014.    Prior to January 1, 2014, properties identified as held for sale and/or disposed of were presented in discontinued operations for all periods presented.  See Note 7: Discontinued Operations.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2014
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)	6 Months Ended
	Jun. 30, 2014
Real Estate Properties [Line Items]	'
Schedule Of Purchase Price Allocation	'
			Andover
			Place
	Land	$	8,535
	Buildings and improvements		27,609
	Furniture, fixtures and equipment		459
	In-place lease values (1)		1,118
			37,721
	Less: Below market lease values (1)		-25
	Net cash paid at acquisition	$	37,696
	(1)In-place lease values and below market lease values will be amortized over one year or less.
Schedule Of Property Sales	'
					Rentable			Net			Net
	Sale			# of	Square			Sales			Book			Realized
	Date	Property/Address	Location	Bldgs.	Feet			Proceeds			Value			Gain
	4/23/14	22 Sylvan Way	Parsippany, New Jersey	1	249,409		$	94,897		$	60,244		$	34,653
	6/23/14	30 Knightsbridge Road (a)	Piscataway, New Jersey	4	680,350			54,641			52,361			2,280
	6/23/14	470 Chestnut Ridge Road (a) (b)	Woodcliff Lake, New Jersey	1	52,500			7,195			7,109			86
	6/23/14	530 Chestnut Ridge Road (a) (b)	Woodcliff Lake, New Jersey	1	57,204			6,299			6,235			64
	6/27/14	400 Rella Boulevard	Suffern, New York	1	180,000			27,539			10,938			16,601
	6/30/14	412 Mount Kemble Avenue (a)	Morris Township, New Jersey	1	475,100			44,751			43,851			900
	Totals:			9	1,694,563		$	235,322		$	180,738		$	54,584
	(a)The Company completed the sale of these properties for approximately $117 million: $114.6 million in cash and subordinated equity interests in each of the properties sold with capital accounts aggregating $2.4 million. Net sale proceeds from the sale aggregated $112.9 million which was comprised of the $117 million gross sales price less the subordinated equity interests of $2.4 million and $1.7 million in closing costs.  The purchasers of these properties are joint ventures formed between the Company and affiliates of the Keystone Property Group (“Keystone Entities”).  The senior equity will receive a 15 percent internal rate of return (“IRR”) after which the subordinated equity will receive a ten percent IRR and then all distributable cash flow will be split equally between the Keystone Entities and the Company. 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.  The Company has contracts with Keystone Entities to sell an additional seven of its office properties in New Jersey, New York and Connecticut, aggregating approximately 928,258 square feet, for approximately $104 million, comprised of: $78.3 million in cash from a combination of Keystone Entities senior and pari-passu equity and mortgage financing; Company subordinated equity interests in each of the properties being sold with capital accounts aggregating $18.8 million; and Company pari passu equity interests in three of the properties being sold aggregating $6.9 million.
	(b)The Company recorded an impairment charge of $3.9 million on these properties at December 31, 2013 as it estimated that the carrying value of the properties may not be recoverable over their anticipated holding periods.
Summary Of Income From Properties Sold	'
		Three Months Ended			Six Months Ended
			June 30,		June 30,
			2013			2013
	Total revenues	$	12,333		$	27,205
	Operating and other expenses		-4,778			-10,982
	Depreciation and amortization		-2,989			-6,442
	Interest expense		-36			-118
	Income from discontinued operations		4,530			9,663
	Loss from early extinguishment of debt		-703			-703
	Impairments (1)		-23,851			-23,851
	Realized gains on disposition of rental property		37,609			37,609
	Realized gains (losses) and unrealized losses on
	disposition of rental property and impairments, net		13,758			13,758
	Total discontinued operations	$	17,585		$	22,718
	(1)Represents impairment charges recorded on certain properties prior to their sale.
Properties Sold, Year To Date [Member]	'
Real Estate Properties [Line Items]	'
Summary Of Income From Properties Sold	'
				Three Months Ended						Six Months Ended
				June 30,						June 30,
				2014			2013			2014			2013
	Total revenues		$	6,547		$	9,235		$	16,302		$	18,478
	Operating and other expenses			-3,208			-3,918			-8,764			-7,099
	Depreciation and amortization			-1,433			-2,190			-3,379			-4,376
	Interest income			3			-			3			-
	Income from properties sold			1,909			3,127			4,162			7,003

Investments_In_Unconsolidated_1

Investments In Unconsolidated Joint Ventures (Tables)	6 Months Ended
	Jun. 30, 2014
Investments In Unconsolidated Joint Ventures [Abstract]	'
Summary Of Unconsolidated Joint Ventures	'
		Number of		Company's				Company's			Property Debt
		Apartment Units		Effective				Carrying				Maturity	Interest
	Entity / Property Name	or Square Feet (sf)		Ownership % (a)				Amount			Balance	Date	Rate
	Multi-family
	Marbella RoseGarden, L.L.C./ Marbella  (b)	412	units	24.27	%		$	15,782		$	95,000	5/1/18	4.99	%
	RoseGarden Monaco Holdings, L.L.C./ Monaco (North and South)  (b)	523	units	15.00	%			2,686			165,000	2/1/21	4.19	%
	Rosewood Lafayette Holdings, L.L.C./ Highlands at Morristown Station  (b)	217	units	25.00	%			496			39,021	7/1/15	4.00	%
	PruRose Port Imperial South 15, LLC /RiversEdge at Port Imperial (b)	236	units	50.00	%			-			57,500	9/1/20	4.32	%
	Rosewood Morristown, L.L.C. / Metropolitan at 40 Park  (c) (d)	130	units	12.50	%			6,257			46,217	(e)	(e)
	Overlook Ridge JV, L.L.C./ Quarrystone  (b) (f)	251	units	25.00	%			-			75,366	(g)	(g)
	Overlook Ridge JV 2C/3B, L.L.C./Overlook Ridge 2C & 3B  (b)	371	units	25.00	%			-			41,006	12/28/15	L+2.50	%	(h)
	PruRose Riverwalk G, L.L.C./ RiverTrace at Port Imperial   (b)	316	units	25.00	%			1,950			76,334	7/15/21	6.00	%	(i)
	Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C)  (b)	355	units	7.50	%			-			72,619	6/27/16	L+2.10	%	(j)
	Crystal House Apartments Investors LLC / Crystal House  (k)	828	units	25.00	%			26,458			165,000	3/19/20	3.17	%
	Portside Master Company, L.L.C./ Portside at Pier One - Bldg 7  (b)	176	units	38.25	%			2,655			20,007	12/5/15	L+2.50	%	(l)
	PruRose Port Imperial South 13, LLC / Port Imperial Bldg 13  (b)	280	units	20.00	%			1,685			26,097	6/27/16	L+2.15	%	(m)
	Roseland/Port Imperial Partners, L.P./ Riverwalk C  (b) (n)	363	units	20.00	%			1,926			-	-	-
	RoseGarden Marbella South, L.L.C./ Marbella II  (b)	311	units	24.27	%			8,580			12,503	3/30/17	L+2.25	%	(o)
	Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) (b)	227	units	7.50	%			-			22,157	1/25/17	L+2.10	%	(p)
	Riverpark at Harrison I, L.L.C./ Riverpark at Harrison	141	units	36.00	%			4,247			13,370	6/27/16	L+2.35	%	(q)
	Capitol Place Mezz LLC / Station Townhouses	377	units	50.00	%			47,978			45,039	7/1/33	4.82	%	(r)
	Harborside Unit A Urban Renewal, L.L.C. / URL Harborside	763	units	85.00	%			22,150			-	-	-
	Overlook Ridge, L.L.C./Overlook Ridge Land	896	potential units	50.00	%			-			16,940	3/2/15	L+3.50	%
	RoseGarden Monaco, L.L.C./ San Remo Land	300	potential units	41.67	%			1,255			-	-	-
	Grand Jersey Waterfront URA, L.L.C./ Liberty Landing	1,000	potential units	50.00	%			337			-	-	-
	Office
	Red Bank Corporate Plaza, L.L.C./ Red Bank	92,878	sf	50.00	%			3,771			16,240	5/17/16	L+3.00	%	(s)
	12 Vreeland Associates, L.L.C./ 12 Vreeland Road	139,750	sf	50.00	%			5,658			14,717	7/1/23	2.87	%
	BNES Associates III / Offices at Crystal Lake	106,345	sf	31.25	%			1,899			7,057	11/1/23	4.76	%
	Hillsborough 206 Holdings, L.L.C./ Hillsborough 206	160,000	sf	50.00	%			1,962			-	-	-
	KPG-P 100 IMW JV, LLC / 100 Independence Mall West	339,615	sf	33.33	%			751			61,500	9/9/16	L+7.00	%	(t)
	Keystone-Penn	1,842,820	sf	(u)				-			200,601	(v)	(v)
	Keystone-TriState	1,266,384	sf	(u)				-			118,890	(w)	(w)
	KPG-MCG Curtis JV, L.L.C./ Curtis Center	885,000	sf	50.00	%			2,187			-	-	-
	Curtis Center TIC I and II LLC / Curtis Center	n/a		(x)				61,296			-	-	-
	Other
	Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations)	1,225,000	sf	50.00	%			3,848			-	-	-
	Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial  (b)	30,745	sf	20.00	%			1,883			-	-	-
	South Pier at Harborside / Hyatt Regency Jersey City on the Hudson	350	rooms	50.00	%			-			66,799	(y)	(y)
	Stamford SM LLC / Senior Mezzanine Loan  (z)	n/a	n/a	80.00	%			37,418			-	-	-
	Other (aa)							751			-	-	-
	Totals:						$	265,866		$	1,474,980
		(a)		Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.
		(b)		The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the Company is not expected to meaningfully participate in the venture's cash flows in the near term.
		(c)		Through the joint venture, the Company also owns a 12.5 percent interest in a 50,973 square feet of retail building ("Shops at 40 Park") and a 25 percent interest in a to-be-built 59-unit, five story multi-family rental development property ("Lofts at 40 Park").
		(d)		The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the payment of the outstanding balance remaining on a note ($975 as of June 30, 2014), and is not expected to meaningfully participate in the venture's cash flows in the near term.
		(e)		Property debt balance consists of: (i) a loan, collateralized by the Metropolitan at 40 Park, has a balance of $38,600, bears interest at 3.25 percent, matures in September 2020 and is interest only through September 2015; (ii) loan, collateralized by the Shops at 40 Park, has a balance of $6,500, bears interest at 3.63 percent, matures in August 2018 and is interest-only through July 2015; and (iii) the loan, collateralized by the Lofts at 40 Park, has a balance of $1,117, bears interest at LIBOR plus 250 basis points and matures in September 2015.  The Shops at 40 Park mortgage loan also provides for additional borrowing proceeds of $1 million based on certain preferred thresholds being achieved.
		(f)		Through the joint venture, the Company also owns a 50 percent interest in a land parcel ("Overlook Phase III Land") that can accommodate the development of approximately 240 apartment units.
		(g)		Property debt balance consists of: (i) a  loan, collateralized by the Overlook Phase III Land, has a balance of $5,709, bears interest at a rate of LIBOR plus 250 basis points, matures in April 2015 and, subject to certain conditions, provides for a one-year extension option with a fee of 25 basis points, and (ii) the senior loan, collateralized by the Quarrystone property, has a balance of $52,657, bears interest at LIBOR plus 200 basis, matures in March 2016 and (iii) the junior loan, with a balance of $17,000, bears interest at LIBOR plus 90 basis points, matures in March 2016 and is collateralized by a $17,000 letter of credit provided by an affiliate of the partner.
		(h)		The construction loan has a maximum borrowing amount of $55,500 and provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points each.  The joint venture has a swap agreement that fixes the all-in rate to 3.0875 percent per annum on an initial notional amount of $1,840, increasing to $50,800, for the period from September 3, 2013 to November 2, 2015.
		(i)		The construction loan has a maximum borrowing amount of $83,113.
		(j)		The construction loan has a maximum borrowing amount of $91,000 and provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.
		(k)		The Company also owns a 50 percent interest in a vacant land to accommodate the development of approximately 295 additional units of which 252 are currently approved.
		(l)		The construction loan has a maximum borrowing amount of $42,500 and provides, subject to certain conditions, two two-year extension options with a fee of 12.5 basis points for the first two-year extension and 25 basis points for the second two-year extension.
		(m)		The construction loan has a maximum borrowing amount of $73,350 and provides, subject to certain conditions, one-year extension option followed by a six-month extension option with a fee of 25 basis points each. The joint venture has a swap agreement that fixes the all-in rate to 2.79 percent per annum on an initial notional amount of $1,620, increasing to $69,500 for the period from July 1, 2013 to January 1, 2016.
		(n)		The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J ("Port Imperial North Land") that can accommodate the development of 836 apartment units.
		(o)		The construction loan has a maximum borrowing amount of $77,400 and provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points for each year.
		(p)		The construction loan has a maximum borrowing amount of $57,000 and provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.
		(q)		The construction loan has a maximum borrowing amount of $23,400 and provides, subject to certain conditions, two one-year extension options with a fee of 20 basis points for each year.
		(r)		The construction loan has a maximum borrowing amount of $100,700 with amortization starting in August 2017.
		(s)		The joint venture has a swap agreement that fixes the all-in rate to 3.99375 percent per annum on an initial notional amount of $13,650 and then adjusting in accordance with an amortization schedule, which is effective from October 17, 2011 through loan maturity.
		(t)		The mortgage loan has two one-year extension options, subject to certain conditions, and includes a $25 million construction reserve.
		(u)		The Company’s equity interests in the joint ventures will be subordinated to affiliates of the Keystone Property Group receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a ten percent IRR on its subordinate equity and then all profit will be split equally.
	(v)		Principal balance of $127,600 bears interest at 5.114 percent and matures in August 27, 2023; principal balance of $62,577 bears interest at rates ranging from LIBOR+5.0 percent to LIBOR+5.75 percent and matures in August 27, 2016; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures in August 27, 2015.
	(w)		Principal balance of $77,650 bears interest at rates ranging from 4.888 percent to 4.93 percent and matures on July 6, 2024; principal balance of $41,240 bears interest at LIBOR+4.95 percent and matures on July 1, 2017.
	(x)		Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12.  See discussion in Recent Transactions following in this footnote.
	(y)		Balance includes: (i) mortgage loan, collateralized by the hotel property, has a balance of $62,175, bears interest at 6.15 percent and matures in November 2016, and (ii) loan with a balance of $4.6 million, bears interest at fixed rates ranging from 6.09 percent to 6.62 percent and matures in August 1, 2020.  The Company posted a $4.6 million letter of credit in support of this loan, half of which is indemnified by the partner.
	(z)		The joint venture owns a senior mezzanine loan  ("Mezz Loan") with a face value of $50,000 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.  The interest-only Mezz Loan has a carrying value of $46,505 and is subject to an agreement that provides, subject to certain conditions, for the payment of principal proceeds above $47,000 to another party. The Mezz loan bears interest at LIBOR plus 325 basis points and matures in August 2014.  The joint venture is evaluating its option regarding its investment as the loan approaches maturity.
	(aa)		The Company owns other interests in various unconsolidated joint ventures, including interests in assets previously owned and interest in ventures whose businesses are related to its core operations. These ventures are not expected to significantly impact the Company's operations in the near term.
Summary Of Financial Position Of Unconsolidated Joint Ventures	'
				June 30,			December 31,
				2014			2013
	Assets:
	Rental property, net		$	1,202,271		$	755,049
	Loan receivable			46,505			45,050
	Other assets			486,239			582,990
	Total assets		$	1,735,015		$	1,383,089
	Liabilities and partners'/
	members' capital:
	Mortgages and loans payable		$	844,476		$	637,709
	Other liabilities			211,959			87,231
	Partners'/members' capital			678,580			658,149
	Total liabilities and
	partners'/members' capital		$	1,735,015		$	1,383,089
Summary Of Company's Investment In Unconsolidated Joint Ventures	'
			June 30,			December 31,
	Entity / Property Name		2014			2013
	Marbella RoseGarden, L.L.C./ Marbella	$	15,782		$	15,797
	RoseGarden Monaco Holdings, L.L.C./ Monaco (North and South)		2,686			3,201
	Rosewood Lafayette Holdings, L.L.C./ Highlands at Morristown Station		496			857
	PruRose Port Imperial South 15, LLC /RiversEdge at Port Imperial		-			-
	Rosewood Morristown, L.L.C. / Metropolitan at 40 Park		6,257			6,455
	Overlook Ridge JV, L.L.C./ Quarrystone		-			-
	Overlook Ridge JV 2C/3B, L.L.C./Overlook Ridge 2C & 3B		-			-
	PruRose Riverwalk G, L.L.C./ RiverTrace at Port Imperial		1,950			3,117
	Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C)		-			203
	Crystal House Apartments Investors LLC / Crystal House		26,458			26,838
	Portside Master Company, L.L.C./ Portside at Pier One - Bldg 7		2,655			3,207
	PruRose Port Imperial South 13, LLC / Port Imperial Bldg 13		1,685			2,206
	Roseland/Port Imperial Partners, L.P./ Riverwalk C		1,926			2,068
	RoseGarden Marbella South, L.L.C./ Marbella II		8,580			7,567
	Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B)		-			24
	Riverpark at Harrison I, L.L.C./ Riverpark at Harrison		4,247			3,655
	Capitol Place Mezz LLC / Station Townhouses		47,978			46,628
	Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (a)		22,150			-
	Overlook Ridge, L.L.C./Overlook Ridge Land		-			-
	RoseGarden Monaco, L.L.C./ San Remo Land		1,255			1,224
	Grand Jersey Waterfront URA, L.L.C./ Liberty Landing		337			337
	Red Bank Corporate Plaza, L.L.C./ Red Bank		3,771			4,046
	12 Vreeland Associates, L.L.C./ 12 Vreeland Road		5,658			5,514
	BNES Associates III / Offices at Crystal Lake		1,899			1,753
	Hillsborough 206 Holdings, L.L.C./ Hillsborough 206		1,962			1,962
	KPG-P 100 IMW JV, LLC / 100 Independence Mall West		751			1,887
	Keystone-Penn		-			-
	Keystone-TriState		-			-
	KPG-MCG Curtis JV, L.L.C./ Curtis Center (a)		2,187			-
	Curtis Center TIC I and II LLC / Curtis Center (b)		61,296			-
	Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations)		3,848			3,702
	Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial		1,883			1,930
	South Pier at Harborside / Hyatt Regency Jersey City on the Hudson (c)		-			-
	Stamford SM LLC / Senior Mezzanine Loan		37,418			36,258
	Other		751			693
	Company's investment in unconsolidated joint ventures	$	265,866		$	181,129
	(a)See discussion in Recent Transactions following in this footnote.
	(b)Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12.  See discussion in Recent Transactions following in this footnote.
	(c)The negative investment balance for this joint venture of $710 and $1,706 as of June 30, 2014 and December 31, 2013, respectively, were included in accounts payable, accrued expenses and other liabilities.
Summary Of Results Of Operations Of Unconsolidated Joint Ventures	'
			Three Months Ended						Six Months Ended
			June 30,						June 30,
			2014			2013			2014			2013
	Total revenues	$	113,118		$	91,274		$	144,111		$	103,693
	Operating and other expenses		-96,605			-81,321			-114,958			-89,268
	Depreciation and amortization		-8,213			-10,083			-16,581			-13,174
	Interest expense		-8,786			-3,310			-15,127			-5,322
	Net income (loss)	$	-486		$	-3,440		$	-2,555		$	-4,071
Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures	'
			Three Months Ended						Six Months Ended
			June 30,						June 30,
	Entity / Property Name		2014			2013			2014			2013
	Marbella RoseGarden, L.L.C./ Marbella	$	-9		$	-165		$	-15		$	-276
	RoseGarden Monaco Holdings, L.L.C./ Monaco (North and South)		-238			-423			-515			-822
	Rosewood Lafayette Holdings, L.L.C./ Highlands at Morristown Station		-203			-284			-419			-574
	PruRose Port Imperial South 15, LLC /RiversEdge at Port Imperial		-			-			-			-606
	Rosewood Morristown, L.L.C. / Metropolitan at 40 Park		-76			-117			-174			-241
	Overlook Ridge JV, L.L.C./ Quarrystone		-			-			-			-
	Overlook Ridge JV 2C/3B, L.L.C./Overlook Ridge 2C & 3B		-			224			62			151
	PruRose Riverwalk G, L.L.C./ RiverTrace at Port Imperial		-613			-192			-1,151			-378
	Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C)		-91			-82			-203			-168
	Crystal House Apartments Investors LLC / Crystal House		53			-1,535			-274			-1,522
	Portside Master Company, L.L.C./ Portside at Pier One - Bldg 7		-220			-68			-434			-113
	PruRose Port Imperial South 13, LLC / Port Imperial Bldg 13		-213			-145			-418			-278
	Roseland/Port Imperial Partners, L.P./ Riverwalk C		-180			-			-345			-
	RoseGarden Marbella South, L.L.C./ Marbella II		-			-19			-			-37
	Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B)		-			-34			-15			-63
	Riverpark at Harrison I, L.L.C./ Riverpark at Harrison		-			-			-			-
	Capitol Place Mezz LLC / Station Townhouses		-			-			-			-
	Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (a)		-212			-			-212			-
	Overlook Ridge, L.L.C./Overlook Ridge Land		-213			-			-259			-
	RoseGarden Monaco, L.L.C./ San Remo Land		-			-			-			-
	Grand Jersey Waterfront URA, L.L.C./ Liberty Landing		-16			-			-54			-
	Red Bank Corporate Plaza, L.L.C./ Red Bank		106			106			205			207
	12 Vreeland Associates, L.L.C./ 12 Vreeland Road		54			116			144			24
	BNES Associates III / Offices at Crystal Lake		110			-2			147			-71
	Hillsborough 206 Holdings, L.L.C./ Hillsborough 206		-			-			-5			-
	KPG-P 100 IMW JV, LLC / 100 Independence Mall West		-483			-			-1,136			-
	Keystone-Penn		-			-			-			-
	Keystone-TriState		-			-			-			-
	KPG-MCG Curtis JV, L.L.C./ TIC I and II LLC / Curtis Center (b)		251			-			251			-
	Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations)		44			19			146			28
	Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial		-23			-83			-47			-132
	South Pier at Harborside / Hyatt Regency Jersey City on the Hudson		892			1,056			1,290			545
	Stamford SM LLC / Senior Mezzanine Loan		928			897			1,844			1,782
	Other		795			651			795			714
	Company's equity in earnings (loss) of unconsolidated joint ventures	$	443		$	-80		$	-792		$	-1,830
	(a)See discussion in Recent Transactions following in this footnote.
	(b)Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12.  See discussion in Recent Transactions following in this footnote.

Deferred_Charges_Goodwill_And_1

Deferred Charges, Goodwill And Other Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Deferred Charges, Goodwill And Other Assets [Abstract]	'
Schedule Of Deferred Charges, Goodwill And Other Assets	'
			June 30,		December 31,
	(dollars in thousands)		2014		2013
	Deferred leasing costs	$	227,930	$	258,648
	Deferred financing costs		21,916		25,366
			249,846		284,014
	Accumulated amortization		-112,249		-131,669
	Deferred charges, net		137,597		152,345
	Notes receivable (1)		83,889		21,986
	In-place lease values, related intangibles and other assets, net		9,515		13,659
	Goodwill		2,945		2,945
	Prepaid expenses and other assets, net		32,814		27,584
	Total deferred charges, goodwill and other assets	$	266,760	$	218,519
	(1)Includes: a mortgage receivable for $10.4 million which bears interest at LIBOR plus six percent; a note receivable for $7.8 million which bears interest at eight percent; notes receivable for $62.3 million which bear interest at 3.5 percent (See Note 4: Unconsolidated joint ventures – Recent Transactions); and an interest-free note receivable with a net present value of $3.4 million as of June 30, 2014.  .

Restricted_Cash_Tables

Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2014
Restricted Cash [Abstract]	'
Schedule Of Restricted Cash	'
			June 30,		December 31,
			2014		2013
	Security deposits	$	8,782	$	8,534
	Escrow and other reserve funds		17,623		11,260
	Total restricted cash	$	26,405	$	19,794

Discontinued_Operations_Tables

Discontinued Operations (Tables)	6 Months Ended
	Jun. 30, 2014
Discontinued Operations [Abstract]	'
Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)	'
		Three Months Ended		Six Months Ended
			June 30,	June 30,
			2013		2013
	Total revenues	$	12,333	$	27,205
	Operating and other expenses		-4,778		-10,982
	Depreciation and amortization		-2,989		-6,442
	Interest expense		-36		-118
	Income from discontinued operations		4,530		9,663
	Loss from early extinguishment of debt		-703		-703
	Impairments (1)		-23,851		-23,851
	Realized gains on disposition of rental property		37,609		37,609
	Realized gains (losses) and unrealized losses on
	disposition of rental property and impairments, net		13,758		13,758
	Total discontinued operations	$	17,585	$	22,718
	(1)Represents impairment charges recorded on certain properties prior to their sale.

Senior_Unsecured_Notes_Tables

Senior Unsecured Notes (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Summary Of Senior Unsecured Notes	'
			June 30,		December 31,	Effective
			2014		2013	Rate (1)
	5.125% Senior Unsecured Notes, due February 15, 2014 (2)		-	$	200,030	5.110	%
	5.125% Senior Unsecured Notes, due January 15, 2015	$	149,948		149,902	5.297	%
	5.800% Senior Unsecured Notes, due January 15, 2016		200,123		200,161	5.806	%
	2.500% Senior Unsecured Notes, due  December 15, 2017		249,003		248,855	2.803	%
	7.750% Senior Unsecured Notes, due August 15, 2019		248,906		248,799	8.017	%
	4.500% Senior Unsecured Notes, due April 18, 2022		299,535		299,505	4.612	%
	3.150% Senior Unsecured Notes, due May 15, 2023		269,626		269,323	3.517	%
	Total senior unsecured notes	$	1,417,141	$	1,616,575
	(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)On February 17, 2014, the Company repaid these notes at their maturity using available cash and borrowings on the Company’s unsecured revolving credit facility.

Unsecured_Revolving_Credit_Fac1

Unsecured Revolving Credit Facility (Tables)	6 Months Ended
	Jun. 30, 2014
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)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Summary Of Mortgages, Loans Payable And Other Obligations	'
				Effective			June 30,		December 31,
	Property Name	Lender		Rate (a)			2014		2013	Maturity
	6301 Ivy Lane (b)	RGA Reinsurance Company		5.520	%	$	-	$	5,447	-
	395 West Passaic (c)	State Farm Life Insurance Co.		6.004	%		-		9,719	-
	35 Waterview Boulevard (d)	Wells Fargo CMBS		6.348	%		-		18,417	-
	233 Canoe Brook Road (e)	The Provident Bank		4.375	%		-		3,877	-
	6 Becker, 85 Livingston,	Wells Fargo CMBS		10.220	%		64,829		64,233	8/11/2014 (l)
	75 Livingston &
	20 Waterview (f)
	4 Sylvan	Wells Fargo CMBS		10.190	%		14,565		14,538	8/11/2014 (l)
	10 Independence (g)	Wells Fargo CMBS		12.440	%		16,850		16,638	8/11/14
	Port Imperial South 4/5	Wells Fargo Bank N.A.	LIBOR+3.50		%		36,950		36,950	8/30/14
	9200 Edmonston Road (h)	Principal Commercial Funding L.L.C.		5.534	%		4,026		4,115	5/1/15
	Port Imperial South	Wells Fargo Bank N.A.	LIBOR+1.75		%		43,697		43,278	9/19/15
	4 Becker	Wells Fargo CMBS		9.550	%		39,108		38,820	5/11/16
	5 Becker (i)	Wells Fargo CMBS		12.830	%		13,467		13,092	5/11/16
	210 Clay	Wells Fargo CMBS		13.420	%		13,039		12,767	5/11/16
	Various (j)	Prudential Insurance		6.332	%		146,532		147,477	1/15/17
	150 Main St.	Webster Bank	LIBOR+2.35		%		217		-	3/30/17
	23 Main Street	JPMorgan CMBS		5.587	%		29,529		29,843	9/1/18
	Harborside Plaza 5	The Northwestern Mutual Life		6.842	%		223,381		225,139	11/1/18
		Insurance Co. & New York Life
		Insurance Co.
	100 Walnut Avenue	Guardian Life Insurance Co.		7.311	%		18,669		18,792	2/1/19
	One River Center (k)	Guardian Life Insurance Co.		7.311	%		42,768		43,049	2/1/19
	Park Square	Wells Fargo Bank N.A.	LIBOR+1.75		%		27,500		-	4/10/19
	Total mortgages, loans payable and other obligations					$	735,127	$	746,191
		(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)		On April 1, 2014, the Company repaid the mortgage loan at par, using available cash.
		(c)		On May 1, 2014, the Company repaid the mortgage loan at par, using available cash.
		(d)		On May 12, 2014, the Company repaid the mortgage loan at par, using borrowings on the Company’s unsecured revolving credit facility.
		(e)		On April 30, 2014, the Company repaid the mortgage loan at par, using available cash.
		(f)		Mortgage is cross collateralized by the four properties.
		(g)		The Company is negotiating a deed-in-lieu of foreclosure in satisfaction of this mortgage loan.
		(h)		The mortgage loan originally matured on May 1, 2013.  The maturity date was extended until May 1, 2015 with the same interest rate.  Excess cash flow, as defined, is being held by the lender for re-leasing costs.  The deed for the property was placed in escrow and is available to the lender in the event of default or non-payment at maturity.
		(i)		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 deed-in-lieu of foreclosure and began remitting available cash flow to the lender effective August 2013.
		(j)		Mortgage is cross collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.
		(k)		Mortgage is collateralized by the three properties comprising One River Center.
	(l)The Company has begun discussions with the lender to extend the maturity date and modify the loan terms.

Commitments_And_Contingencies_

Commitments And Contingencies (Tables)	6 Months Ended
	Jun. 30, 2014
Commitments And Contingencies [Abstract]	'
Future Minimum Rental Payments Of Ground Leases	'
	Year		Amount
	July 1 through December 31, 2014	$	184
	2015		371
	2016		371
	2017		267
	2018		232
	2019 through 2084		15,819
	Total	$	17,244

Tenant_Leases_Tables

Tenant Leases (Tables)	6 Months Ended
	Jun. 30, 2014
Tenant Leases [Abstract]	'
Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases	'
	Year		Amount
	July 1 through December 31, 2014	$	243,001
	2015		451,877
	2016		409,744
	2017		357,438
	2018		274,021
	2019 and thereafter		1,045,178
	Total	$	2,781,259

MackCali_Realty_Corporation_St1

Mack-Cali Realty Corporation Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
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, 2014	15,000		$	40.54		$	-
	Granted	5,000			21.25
	Lapsed or Cancelled	-10,000			38.07
	Outstanding at June 30, 2014  ($21.25 – $45.47)	10,000		$	33.36		$	-
	Options exercisable at June 30, 2014	5,000
	Available for grant at June 30, 2014	4,466,143
Schedule Of Weighted Average Assumptions	'
	Expected life (in years)		6
	Risk-free interest rate		1.50	%
	Volatility		20.26	%
	Dividend yield		5.65	%
Schedule Of Restricted Stock Awards	'
					Weighted-Average
					Grant – Date
		Shares			Fair Value
	Outstanding at January 1, 2014 (a)	153,560		$	25.20
	Granted (b)	208,589			20.83
	Vested	-183,214			22.37
	Forfeited	-119			26.36
	Outstanding at June 30, 2014	178,816		$	23.00
	(a)Includes 63,933 Performance Shares which were legally granted in 2013 for which the 2013 performance goals were not met, which may be earned if subsequent years’ performance goals are met.
	(b)Includes 42,000 Performance Shares which were legally granted in 2013 for which the 2014 performance goals were set by the Committee on March 31, 2014.  Also includes 87,734 shares which were additionally granted to two executive officers in connection with their departure affective March 31, 2014 and which vested on April 1, 2014.
Schedule Of Basic And Diluted Earnings Per Share	'
			Three Months Ended							Six Months Ended
			June 30,							June 30,
	Computation of Basic EPS		2014			2013				2014		2013
	Income from continuing operations	$	57,347		$	8,599			$	39,719	$	16,555
	Add: Noncontrolling interest in consolidated joint ventures		290			62				612		124
	Add (deduct):  Noncontrolling interest in Operating Partnership		-6,514			-1,048				-4,506		-2,021
	Income from continuing operations available to common shareholders		51,123			7,613				35,825		14,658
	Income from discontinued operations available to common shareholders		-			15,458				-		19,969
	Net income available to common shareholders	$	51,123		$	23,071			$	35,825	$	34,627
	Weighted average common shares		88,691			87,708				88,491		87,688
	Basic EPS:
	Income from continuing operations available to common shareholders	$	0.58		$	0.09			$	0.40	$	0.16
	Income from discontinued operations available to common
	shareholders		-			0.17				-		0.23
	Net income available to common shareholders	$	0.58		$	0.26			$	0.40	$	0.39
			Three Months Ended							Six Months Ended
			June 30,							June 30,
	Computation of Diluted EPS		2014			2013				2014		2013
	Income from continuing operations available to common shareholders	$	51,123		$	7,613			$	35,825	$	14,658
	(Deduct) add: Noncontrolling interest in Operating Partnership		6,514			1,048				4,506		2,021
	Income from continuing operations for diluted earnings per share		57,637			8,661				40,331		16,679
	Income from discontinued operations for diluted earnings per share		-			17,585				-		22,718
	Net income available to common shareholders	$	57,637		$	26,246			$	40,331	$	39,397
	Weighted average common shares		100,023			99,895				99,964		99,892
	Diluted EPS:
	Income from continuing operations available to common shareholders	$	0.58		$	0.09			$	0.40	$	0.16
	Income from discontinued operations available to common
	shareholders		-			0.17				-		0.23
	Net income available to common shareholders	$	0.58		$	0.26			$	0.40	$	0.39
	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			Six Months Ended
		June 30,			June 30,
		2014	2013		2014	2013
	Basic EPS shares	88,691	87,708		88,491	87,688
	Add:   Operating Partnership – common units	11,302	12,072		11,444	12,085
	Restricted Stock Awards	30	115		29	119
	Diluted EPS Shares	100,023	99,895		99,964	99,892

Noncontrolling_Interests_In_Su1

Noncontrolling Interests In Subsidiaries (Tables)	6 Months Ended
	Jun. 30, 2014
Noncontrolling Interests In Subsidiaries [Abstract]	'
Changes In Noncontrolling Interests Of Subsidiaries	'
		Common
		Units
	Balance at January 1, 2014	11,864,775
	Redemption of common units for shares of common stock	-700,757
	Balance at June 30, 2014	11,164,018

Segment_Reporting_Tables

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Schedule Of Segment Reporting Information, By Segment	'
	Selected results of operations for the three and six months ended June 30, 2014 and 2013 and selected asset information as of June 30, 2014 and December 31, 2013 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				Multi-family				Corporate		Total
			& Other		Multi-family		Services				& Other (d)		Company
	Total revenues:
	Three months ended:
	30-Jun-14	$	150,877	$	6,329	$	7,403	(e)		$	-4,309	$	160,300
	30-Jun-13		155,249		3,655		6,394	(f)			3,048		168,346
	Six months ended:
	30-Jun-14		311,450		12,132		14,351	(g)			-8,037		329,896
	30-Jun-13		313,897		4,937		11,878	(h)			8,547		339,259
	Total operating and
	interest expenses (a):
	Three months ended:
	30-Jun-14	$	72,303	$	3,006	$	8,382			$	29,578	$	113,269
	30-Jun-13		65,889		1,568		7,657				38,888		114,002
	Six months ended:
	30-Jun-14		159,236		5,705		18,541				70,791		254,273
	30-Jun-13		136,282		2,104		15,132				78,343		231,861
	Equity in earnings (loss) of
	unconsolidated joint ventures:
	Three months ended:
	30-Jun-14	$	1,829	$	-2,255	$	869			$	-	$	443
	30-Jun-13		2,845		-2,925		-				-		-80
	Six months ended:
	30-Jun-14		2,817		-4,478		869				-		-792
	30-Jun-13		3,230		-5,060		-				-		-1,830
	Net operating income (loss) (b):
	Three months ended:
	30-Jun-14	$	80,403	$	1,068	$	-110			$	-33,887	$	47,474
	30-Jun-13		92,205		-838		-1,263				-35,840		54,264
	Six months ended:
	30-Jun-14		155,031		1,949		-3,321				-78,828		74,831
	30-Jun-13		180,845		-2,227		-3,254				-69,796		105,568
	Total assets:
	30-Jun-14	$	3,796,166	$	398,190	$	9,004			$	151,412	$	4,354,772
	31-Dec-13		3,886,574		377,237		10,488				241,029		4,515,328
	Total long-lived assets (c):
	30-Jun-14	$	3,421,351	$	277,734	$	3,923			$	3,479	$	3,706,487
	31-Dec-13		3,620,494		240,501		3,468				3,730		3,868,193
	Total investments in
	unconsolidated joint ventures:
	30-Jun-14	$	116,829	$	148,286	$	751			$	-	$	265,866
	31-Dec-13		53,160		127,276		693				-		181,129
	(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 and goodwill.
	(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 $935 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
	(f)Includes $571 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
	(g)Includes $1,800 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
	(h)Includes $767 of fees earned for this period from the multi-family 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				Six Months Ended
			June 30,				June 30,
			2014		2013		2014			2013
	Net operating income	$	47,474	$	54,264	$	74,831		$	105,568
	Less:
	Depreciation and amortization		-44,711		-45,665		-89,696			-89,013
	Realized gains and unrealized losses on disposition of
	rental property, net		54,584		-		54,584			-
	Income from continuing operations		57,347		8,599		39,719			16,555
	Discontinued operations:
Income from discontinued operations		-		4,530		-			9,663
Loss from early extinguishment of debt		-		-703		-			-703
Realized gains and unrealized losses on disposition of
rental property, net		-		13,758		-			13,758
Total discontinued operations		-		17,585		-			22,718
Net income		57,347		26,184		39,719			39,273
Noncontrolling interest in consolidated joint ventures		290		62		612			124
Noncontrolling interest in Operating Partnership		-6,514		-1,048		-4,506			-2,021
Noncontrolling interest in discontinued operations		-		-2,127		-			-2,749
Net income available to common shareholders	$	51,123	$	23,071	$	35,825		$	34,627

Organization_And_Basis_Of_Pres1

Organization And Basis Of Presentation (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
	sqft
	state
	property
Real Estate Properties [Line Items]	'	'
Number of properties owned or investment interests	279	'
Aggregate square feet of the property owned or investment interest	31,500,000	'
Number of states where properties are located	7	'
Consolidated joint ventures, total real estate assets	$227	$219.90
Consolidated joint ventures, mortgages	85.8	81.9
Consolidated joint ventures, other liabilities	$15.10	$18.30
Commercial Properties [Member]	'	'
Real Estate Properties [Line Items]	'	'
Number of properties owned or investment interests	266	'
Number of tenants	2,000	'
Multi-Family Properties [Member]	'	'
Real Estate Properties [Line Items]	'	'
Number of properties owned or investment interests	13	'
Number of units	3,898	'
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	30,900,000	'
Unconsolidated Joint Venture Office Buildings [Member]	'	'
Real Estate Properties [Line Items]	'	'
Number of properties owned or investment interests	30	'
Aggregate square feet of the property owned or investment interest	5,100,000	'
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	'
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	'
Parking/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	121,500	'
Unconsolidated Joint Venture Parking/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			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jul. 03, 2014	Jan. 06, 2014
Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Capitalized development and construction salaries and other related costs	$900,000	'	$900,000	$1,800,000	$1,700,000	'	'
Construction, tenant improvement, and development in-progress	44,200,000	40,800,000	'	44,200,000	'	'	'
Maximum period after cessation of major construction activity that projects are considered complete	'	'	'	'1 year	'	'	'
Threshold of investment value for discontinuation of equity method accounting	0	'	'	0	'	'	'
Amortization of deferred financing costs	759,000	'	809,000	1,528,000	1,582,000	'	'
Deferred leasing costs	845,000	'	1,033,000	1,876,000	2,206,000	'	'
Deferred tax asset	14,100,000	'	'	14,100,000	'	'	'
Income taxes, material adjustment amount	'	'	'	0	'	'	'
Common stock, shares outstanding	88,982,062	88,247,591	'	88,982,062	'	88,730,563	87,928,002
Common units outstanding	11,164,018	11,864,775	'	11,164,018	'	11,161,018	11,864,775
Distributions payable, record date	3-Jul-14	6-Jan-14	'	'	'	'	'
Common stock dividends and common unit distributions per share	$0.15	$0.30	'	'	'	'	'
Restricted stock expense	877,000	'	461,000	4,264,000	1,306,000	'	'
Common stock dividends and common unit distributions payable, date	11-Jul-14	15-Jan-14	'	'	'	'	'
Difference between other comprehensive income and net income	0	'	0	0	0	'	'
Accumulated other comprehensive income	0	0	'	0	'	'	'
Executive Officer [Member]	'	'	'	'	'	'	'
Significant Accounting Policies [Line Items]	'	'	'	'	'	'	'
Restricted stock expense	'	'	'	$3,203,000	'	'	'

Significant_Accounting_Policie4

Significant Accounting Policies (Estimated Useful Lives Of Assets) (Details)	6 Months Ended
	Jun. 30, 2014
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 $)	6 Months Ended	0 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Apr. 10, 2014
		Andover Place [Member]
		item
Real Estate Properties [Line Items]	'	'
Number of units	'	220
Cash consideration	'	$37.70
Transaction costs	1.9	'
Sales proceeds handled by intermediary	4.4	'
Acquisition and other investment fundings handled by intermediary	$40	'

Real_Estate_Transactions_Sched

Real Estate Transactions (Schedule Of Purchase Price Allocation) (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
In-Place And Below Market Leases [Member] | Maximum [Member]	'
Business Acquisition [Line Items]	'
Amortization period	'1 year
Andover Place [Member]	'
Business Acquisition [Line Items]	'
Land	8,535
Buildings and improvements	27,609
Furniture, fixtures and equipment	459
In-place lease values	1,118	[1]
Total assets acquired	37,721
Less: Below market lease values	-25	[1]
Net cash paid at acquisition	37,696
[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 Property Sales) (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
	item		property
	sqft		sqft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	9		24
Rentable Square Feet	1,694,563		3,000,000
Net Sales Proceeds	$235,322,000		$390,600,000
Net Book Value	180,738,000		'
Realized Gain (loss)	54,584,000		'
Ownership interest	11.10%		11.90%
22 Sylvan Way [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	1		'
Rentable Square Feet	249,409		'
Net Sales Proceeds	94,897,000		'
Net Book Value	60,244,000		'
Realized Gain (loss)	34,653,000		'
30 Knightsbridge Road [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	4	[1]	'
Rentable Square Feet	680,350	[1]	'
Net Sales Proceeds	54,641,000	[1]	'
Net Book Value	52,361,000	[1]	'
Realized Gain (loss)	2,280,000	[1]	'
470 Chestnut Ridge Road [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	1	[1],[2]	'
Rentable Square Feet	52,500	[1],[2]	'
Net Sales Proceeds	7,195,000	[1],[2]	'
Net Book Value	7,109,000	[1],[2]	'
Realized Gain (loss)	86,000	[1],[2]	'
530 Chestnut Ridge Road [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	1	[1],[2]	'
Rentable Square Feet	57,204	[1],[2]	'
Net Sales Proceeds	6,299,000	[1],[2]	'
Net Book Value	6,235,000	[1],[2]	'
Realized Gain (loss)	64,000	[1],[2]	'
400 Rella Boulevard [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	1		'
Rentable Square Feet	180,000		'
Net Sales Proceeds	27,539,000		'
Net Book Value	10,938,000		'
Realized Gain (loss)	16,601,000		'
412 Mt. Kemble Avenue [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Number of Buildings	1	[1]	'
Rentable Square Feet	475,100	[1]	'
Net Sales Proceeds	44,751,000	[1]	'
Net Book Value	43,851,000	[1]	'
Realized Gain (loss)	900,000	[1]	'
30 Knightsbridge Road, 470 Chestnut Ridge Road, 530 Chestnut Ridge Road And 412 Mount Kemble Avenue [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Net Sales Proceeds	112,900,000		'
Sale price of property	117,000,000		'
Sale price of property, cash	114,600,000		'
Sale price of property, capital accounts	2,400,000		'
Closing costs paid	1,700,000		'
Ownership interest	0.00%		'
30 Knightsbridge Road, 470 Chestnut Ridge Road, 530 Chestnut Ridge Road And 412 Mount Kemble Avenue [Member] | Keystone Entities [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Internal rate of return	15.00%		'
30 Knightsbridge Road, 470 Chestnut Ridge Road, 530 Chestnut Ridge Road And 412 Mount Kemble Avenue [Member] | Parent Company [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Internal rate of return	10.00%		'
7 Property Group [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Sale price of property	104,000,000		'
Sale price of property, cash	78,300,000		'
Sale price of property, capital accounts	18,800,000		'
Number of properties held for sale	7		'
Area of real estate property held for sale (in square feet)	928,258		'
Number of properties with senior pari passu interest	3		'
Sale price of property, capital balance in properties in which senior pari passu interest is held	6,900,000		'
470 Chestnut Ridge Road And 530 Chestnut Ridge Road [Member]	'		'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'		'
Impairment charge	'		$3,900,000
[1]	The Company completed the sale of these properties for approximately $117 million: $114.6 million in cash and subordinated equity interests in each of the properties sold with capital accounts aggregating $2.4 million. Net sale proceeds from the sale aggregated $112.9 million which was comprised of the $117 million gross sales price less the subordinated equity interests of $2.4 million and $1.7 million in closing costs. The purchasers of these properties are joint ventures formed between the Company and affiliates of the Keystone Property Group (bKeystone Entitiesb). The senior equity will receive a 15 percent internal rate of return (bIRRb) after which the subordinated equity will receive a ten percent IRR and then all distributable cash flow will be split equally between the Keystone Entities and the Company. 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. The Company has contracts with Keystone Entities to sell an additional seven of its office properties in New Jersey, New York and Connecticut, aggregating approximately 928,258 square feet, for approximately $104 million, comprised of: $78.3 million in cash from a combination of Keystone Entities senior and pari-passu equity and mortgage financing; Company subordinated equity interests in each of the properties being sold with capital accounts aggregating $18.8 million; and Company pari passu equity interests in three of the properties being sold aggregating $6.9 million.
[2]	The Company recorded an impairment charge of $3.9 million on these properties at December 31, 2013 as it estimated that the carrying value of the properties may not be recoverable over their anticipated holding periods.

Real_Estate_Transactions_Summa

Real Estate Transactions (Summary Of Income From Properties Sold) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'
Total revenues	'	$12,333	'	$27,205
Operating and other expenses	'	-4,778	'	-10,982
Depreciation and amortization	'	-2,989	'	-6,442
Income from properties sold	'	4,530	'	9,663
Properties Sold, Year To Date [Member]	'	'	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'	'
Total revenues	6,547	9,235	16,302	18,478
Operating and other expenses	-3,208	-3,918	-8,764	-7,099
Depreciation and amortization	-1,433	-2,190	-3,379	-4,376
Interest income	3	'	3	'
Income from properties sold	$1,909	$3,127	$4,162	$7,003

Investments_In_Unconsolidated_2

Investments In Unconsolidated Joint Ventures (Narrative) (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Investments in unconsolidated joint ventures	$265,866,000		'	$265,866,000		'	$181,129,000
Management, leasing, development and other services fees	1,400,000		1,300,000	2,800,000		2,300,000	'
Accounts receivable due from unconsolidated joint ventures	824,000		'	824,000		'	523,000
Maximum exposure to loss	110,800,000		'	110,800,000		'	'
Estimated future funding commitments	16,300,000		'	16,300,000		'	'
Unconsolidated Joint Venture Office Buildings [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Number of properties	29		'	29		'	'
Unconsolidated Joint Venture Office And Retail Buildings [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Area of property (in square feet)	4,700,000		'	4,700,000		'	'
Unconsolidated Joint Venture Retail Buildings [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Number of properties	2		'	2		'	'
Unconsolidated Joint Venture Multi-Family Properties [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Number of properties	7		'	7		'	'
Number of units	2,597		'	2,597		'	'
Unconsolidated Joint Venture Hotel [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Number of units	350		'	350		'	'
Unconsolidated Joint Venture Commercial Property [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Area of property (in square feet)	1,700,000		'	1,700,000		'	'
Unconsolidated Joint Venture Development Projects [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Number of units	3,317		'	3,317		'	'
Unconsolidated Joint Venture Land Parcels [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Number of units	4,130		'	4,130		'	'
Unconsolidated Joint Ventures [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Maximum borrowing capacity	311,100,000		'	311,100,000		'	'
Amount outstanding	200,600,000		'	200,600,000		'	'
Unconsolidated Joint Ventures [Member] | Parent Company [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Maximum borrowing capacity	89,900,000		'	89,900,000		'	'
Amount outstanding	79,800,000		'	79,800,000		'	'
Minimum [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Percentage of interest in venture	7.50%		'	7.50%		'	'
Maximum [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Percentage of interest in venture	85.00%		'	85.00%		'	'
Variable Interest Entity [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Investments in unconsolidated joint ventures	94,500,000		'	94,500,000		'	'
Number of VIEs	8		'	8		'	'
Office [Member] | Unconsolidated Joint Venture Land Parcels [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Area of property (in square feet)	1,500,000		'	1,500,000		'	'
South Pier At Harborside [Member]	'		'	'		'	'
Schedule of Equity Method Investments [Line Items]	'		'	'		'	'
Investments in unconsolidated joint ventures	'	[1]	'	'	[1]	'	'	[1]
Number of units	350		'	350		'	'
Percentage of interest in venture	50.00%	[2]	'	50.00%	[2]	'	'
Letter of credit	$4,600,000		'	$4,600,000		'	'
[1]	The negative investment balance for this joint venture of $710 and $1,706 as of June 30, 2014 and December 31, 2013, respectively, were included in accounts payable, accrued expenses and other liabilities.
[2]	Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.

Investments_In_Unconsolidated_3

Investments In Unconsolidated Joint Ventures (Recent Transactions) (Narrative) (Details) (USD $)

6 Months Ended

6 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

6 Months Ended

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

21-May-14

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 06, 2014

Jun. 06, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

90-Day Loan 1 [Member]

90-Day Loan 2 [Member]

Harborside Residential Project [Member]

Harborside Residential Project [Member]

Curtis Center Property [Member]

Curtis Center Property [Member]

Curtis Center Property [Member]

Curtis Center Property [Member]

Curtis Center Property [Member]

Land [Member]

item

Parent Company [Member]

Ironstate Harborside-A, LLC [Member]

sqft

Parent Company [Member]

Keystone Property Group [Member]

Keystone Property Group [Member]

Keystone Property Group [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Parent Company [Member]

Keystone Property Group [Member]

KPG-MCG Curtis JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

item

Parent Company [Member]

Parent Company [Member]

Keystone Property Group [Member]

Parent Company [Member]

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of units

'

'

763

'

'

'

'

'

'

'

'

763

'

'

'

'

'

'

'

Total project costs

'

'

'

'

'

'

'

'

'

'

'

$320,000,000

$88,000,000

'

'

'

'

'

'

State tax credit

'

'

'

'

'

'

'

'

'

'

'

33,000,000

'

'

'

'

'

'

'

Percentage of interest in venture

'

'

85.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Investments in unconsolidated joint ventures

265,866,000

181,129,000

22,150,000

[1]

30,600,000

'

5,400,000

2,187,000

[1]

'

'

'

'

'

'

'

'

125,000,000

62,500,000

62,500,000

5,500,000

Capital credit receivable per developable square foot

'

'

30

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate capital credits

'

'

'

'

'

'

20,600,000

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of operating return on capital

'

'

'

'

75.00%

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Internal rate of return

'

'

'

'

18.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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

'

'

'

'

65.00%

35.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of interest in venture

'

'

85.00%

[2]

'

'

'

50.00%

[2]

50.00%

50.00%

'

'

'

'

50.00%

50.00%

'

'

'

'

Area of property (in square feet)

'

'

'

'

'

'

885,000

'

'

'

'

'

'

'

'

'

'

'

'

Maturity period

'

'

'

'

'

'

'

'

'

'90 days

'90 days

'

'

'

'

'

'

'

'

Loan to affiliate

62,276,000

'

'

'

'

'

'

'

'

52,300,000

10,000,000

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

'

'

'

'

'

3.50%

3.50%

'

'

'

'

'

'

'

'

Lease period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'29 years

'

'

'

Percentage of capital event cash flows distributed

'

'

'

'

75.00%

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Threshold of member unreturned capital for distribution of net operating cash flows

'

'

'

'

'

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

Holding and distribution pattern under operating agreement

'

'

'In general, the operating agreement of URL-Harborside provides that net operating cash flows are distributed first, to the members in respect of preferred return, as defined, until each member shall have received payment of the accrued and unpaid preferred return; and, thereafter, to each member as follows: 75 percent to the Company and 25 percent to ISA.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

See discussion in Recent Transactions following in this footnote.

[2]

Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.

Investments_In_Unconsolidated_4

Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

21-May-14

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Sep. 02, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Minimum [Member]

Maximum [Member]

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

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

RoseGarden Monaco Holdings, L.L.C. [Member]

RoseGarden Monaco Holdings, L.L.C. [Member]

Rosewood Lafayette Holdings, L.L.C. [Member]

Rosewood Lafayette Holdings, L.L.C. [Member]

PruRose Port Imperial South 15, L.L.C. [Member]

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

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

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

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

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

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

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

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

Crystal House Apartments Investors LLC [Member]

Crystal House Apartments Investors LLC [Member]

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

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

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

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

Roseland/Port Imperial Partners, L.P. [Member]

Roseland/Port Imperial Partners, L.P. [Member]

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

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

Estuary Urban Renewal Unit B, LLC [Member]

Estuary Urban Renewal Unit B, LLC [Member]

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

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

Capitol Place Mezz LLC [Member]

Capitol Place Mezz LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

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

RoseGarden Monaco, L.L.C. [Member]

RoseGarden Monaco, L.L.C. [Member]

Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]

Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]

Red Bank Corporate Plaza, L.L.C. [Member]

Red Bank Corporate Plaza, L.L.C. [Member]

12 Vreeland Associates, L.L.C. [Member]

12 Vreeland Associates, L.L.C. [Member]

BNES Associates III [Member]

BNES Associates III [Member]

Hillsborough 206 Holdings, L.L.C. [Member]

Hillsborough 206 Holdings, L.L.C. [Member]

KPG-P 100 IMW JV, LLC [Member]

KPG-P 100 IMW JV, LLC [Member]

Keystone-Penn [Member]

Keystone-Penn [Member]

Keystone-Penn [Member]

Keystone-Penn [Member]

Keystone-Penn [Member]

Keystone-Penn [Member]

Keystone-TriState [Member]

Keystone-TriState [Member]

Keystone-TriState [Member]

Keystone-Penn And Keystone TriState [Member]

Keystone-Penn And Keystone TriState [Member]

KPG-MCG Curtis JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

Curtis Center TIC I And II LLC [Member]

Plaza VIII & IX Associates, L.L.C. [Member]

Plaza VIII & IX Associates, L.L.C. [Member]

Roseland/North Retail, L.L.C. [Member]

Roseland/North Retail, L.L.C. [Member]

South Pier At Harborside [Member]

South Pier At Harborside [Member]

Stamford SM LLC [Member]

Stamford SM LLC [Member]

Other [Member]

Other [Member]

The Shops At 40 Park Property [Member]

Lofts At 40 Park Property [Member]

Metropolitan Property [Member]

Overlook Phase III [Member]

Port Imperial North Land [Member]

Senior Loans [Member]

Junior Loans [Member]

Letter of Credit [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 1 [Member]

Construction Loan Extension Number 2 [Member]

Construction Loan Extension Number 2 [Member]

Construction Loan Extension Number 2 [Member]

Construction Loan Extension Number 2 [Member]

Construction Loan Extension Number 2 [Member]

Mezz Loan [Member]

Class A Office Space [Member]

Residential Space [Member]

Hotel [Member]

item

item

item

item

item

item

item

item

item

item

item

item

item

item

item

item

item

item

Parent Company [Member]

item

item

item

sqft

sqft

sqft

sqft

item

item

Principal Balance Due August 27, 2023 [Member]

Principal Balance Due August 27, 2016 [Member]

Principal Balance Due August 27, 2016 [Member]

Principal Balance Due August 27, 2016 [Member]

Principal Balance Due August 27, 2015 [Member]

item

Principal Balance Due July 6, 2024 [Member]

Principal Balance Due July 1, 2017 [Member]

Parent Company [Member]

Keystone Property Group [Member]

sqft

Parent Company [Member]

Keystone Property Group [Member]

sqft

sqft

item

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

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

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

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

Roseland/Port Imperial Partners, L.P. [Member]

Quarrystone I Property [Member]

Quarrystone I Property [Member]

Quarrystone I Property [Member]

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

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

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

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

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

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

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

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

Estuary Urban Renewal Unit B, LLC [Member]

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

Capitol Place Mezz LLC [Member]

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

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

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

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

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

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

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

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

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

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

Stamford SM LLC [Member]

Mezz Loan [Member]

Mezz Loan [Member]

South Pier At Harborside [Member]

sqft

Minimum [Member]

Maximum [Member]

sqft

item

item

item

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

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

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

item

item

item

item

Stamford SM LLC [Member]

Stamford SM LLC [Member]

item

sqft

sqft

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of Apartment Units

'

'

'

'

412

[1]

'

523

[1]

'

217

[1]

'

236

[1]

130

[2],[3]

'

251

[1],[4]

371

[1]

316

[1]

'

355

[1]

'

828

[5]

'

176

[1]

'

280

[1]

'

363

[1],[6]

'

311

[1]

'

227

[1]

'

141

'

377

'

763

'

'

896

300

'

1,000

'

'

'

'

'

'

'

'

'

'

'

1,842,820

'

'

'

'

'

1,266,384

'

'

'

'

'

'

'

'

'

'

'

'

350

'

'

'

'

'

'

59

'

240

836

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

106

'

'

Square Feet

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

92,878

'

139,750

'

106,345

'

160,000

'

339,615

'

'

'

'

'

'

'

'

'

'

'

'

885,000

'

'

'

1,225,000

[7]

'

30,745

[8]

'

'

'

'

'

'

'

50,973

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,670,000

70,500

'

Company's Effective Ownership %

'

'

7.50%

85.00%

24.27%

[1],[9]

'

15.00%

[1],[9]

'

25.00%

[1],[9]

'

50.00%

[1],[9]

12.50%

[2],[3],[9]

'

25.00%

[1],[4],[9]

25.00%

[1],[9]

25.00%

[1],[9]

'

7.50%

[1],[9]

'

25.00%

[5],[9]

'

38.25%

[1],[9]

'

20.00%

[1],[9]

'

20.00%

[1],[6],[9]

'

24.27%

[1],[9]

'

7.50%

[1],[9]

'

36.00%

[9]

'

50.00%

[9]

'

85.00%

[9]

'

'

50.00%

[9]

41.67%

[9]

'

50.00%

[9]

'

50.00%

[9]

'

50.00%

[9]

'

31.25%

[9]

'

50.00%

[9]

'

33.33%

[9]

'

'

[10],[9]

'

'

'

'

'

'

[10],[9]

'

'

'

'

50.00%

[9]

50.00%

50.00%

'

[11],[9]

50.00%

[7],[9]

'

20.00%

[8],[9]

'

50.00%

[9]

'

80.00%

[7],[9]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Carrying Value

$265,866,000

$181,129,000

'

'

$15,782,000

[1]

$15,797,000

$2,686,000

[1]

$3,201,000

$496,000

[1]

$857,000

'

$6,257,000

[2],[3]

$6,455,000

'

'

$1,950,000

[1]

$3,117,000

'

$203,000

$26,458,000

[5]

$26,838,000

$2,655,000

[1]

$3,207,000

$1,685,000

[1]

$2,206,000

$1,926,000

[1],[6]

$2,068,000

$8,580,000

[1]

$7,567,000

'

$24,000

$4,247,000

$3,655,000

$47,978,000

$46,628,000

$22,150,000

[12]

$30,600,000

'

'

$1,255,000

$1,224,000

$337,000

$337,000

$3,771,000

$4,046,000

$5,658,000

$5,514,000

$1,899,000

$1,753,000

$1,962,000

$1,962,000

$751,000

$1,887,000

'

'

'

'

'

'

'

'

'

'

'

$2,187,000

[12]

'

'

$61,296,000

[11]

$3,848,000

[7]

$3,702,000

$1,883,000

[8]

$1,930,000

'

[13]

'

[13]

$37,418,000

[7]

$36,258,000

$751,000

[8]

$693,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property Debt, Balance

1,474,980,000

'

'

'

95,000,000

[1]

'

165,000,000

[1]

'

39,021,000

[1]

'

57,500,000

[1]

46,217,000

[14],[2],[3]

'

75,366,000

[1],[15],[4]

41,006,000

[1]

76,334,000

[1]

'

72,619,000

[1]

'

165,000,000

[5]

'

20,007,000

[1]

'

26,097,000

[1]

'

'

'

12,503,000

[1]

'

22,157,000

[1]

'

13,370,000

'

45,039,000

'

'

'

'

16,940,000

'

'

'

'

16,240,000

'

14,717,000

'

7,057,000

'

'

'

61,500,000

'

200,601,000

[16]

127,600,000

62,577,000

'

'

10,425,000

118,890,000

[17]

77,650,000

41,240,000

'

'

'

'

'

'

'

'

'

'

66,799,000

[18]

'

'

'

'

'

6,500,000

1,117,000

38,600,000

5,709,000

'

52,657,000

17,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

46,505,000

'

'

62,175,000

Property Debt, Maturity Date

'

'

'

'

'05/01/18

[1]

'

'02/01/21

[1]

'

'07/01/15

[1]

'

'09/01/20

[1]

'

'

'

'12/28/15

[1]

'07/15/21

[1]

'

'06/27/16

[1]

'

'03/19/20

[5]

'

'12/05/15

[1]

'

'06/27/16

[1]

'

'

'

'03/30/17

[1]

'

'01/25/17

[1]

'

'06/27/16

'

'07/01/2033

'

'

'

'

'03/02/15

'

'

'

'

'05/17/16

'

'07/01/23

'

'11/01/23

'

'

'

'09/09/16

'

'

'August 27, 2023

'August 27, 2016

'

'

'August 27, 2015

'

'July 6, 2024

'July 1, 2017

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'August 2018

'September 2015

'September 2020

'April 2015

'

'March 2016

'March 2016

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'August 2014

'

'

'November 2016

Property Debt, Interest Rate

'

'

'

'

4.99%

[1]

'

4.19%

[1]

'

4.00%

[1]

'

4.32%

[1]

'

'

'

'

6.00%

[1],[19]

'

'

'

3.17%

[5]

'

'

'

'

'

'

'

'

'

'

'

'

'

4.82%

[20]

'

'

'

'

'

'

'

'

'

3.99%

'

2.87%

'

4.76%

'

'

'

'

'

'

5.11%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.63%

'

3.25%

'

'

'

'

'

'

3.09%

'

'

'

'

2.79%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.15%

Property Debt, Interest Rate, LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'L+2.50

[1],[21]

'

'

'L+2.10

[1],[22]

'

'

'

'L+2.50

[1],[23]

'

'L+2.15

[1],[24]

'

'

'

'L+2.25

[1],[25]

'

'L+2.10

[1],[26]

'

'L+2.35

[27]

'

'

'

'

'

'

'L+3.50

'

'

'

'

'L+3.00

[28]

'

'

'

'

'

'

'

'L+7.00

[29]

'

'

'

'

'LIBOR+5.0

'LIBOR+5.75

'LIBOR+6.0

'

'

'LIBOR+4.95

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property Debt, Interest Rate, Spread Over LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

[1],[21]

'

'

2.10%

[1],[22]

'

'

'

2.50%

[1],[23]

'

2.15%

[1],[24]

'

'

'

2.25%

[1],[25]

'

2.10%

[1],[26]

'

2.35%

[27]

'

'

'

'

'

'

3.50%

'

'

'

'

3.00%

[28]

'

'

'

'

'

'

'

7.00%

[29]

'

'

'

'

5.00%

5.75%

6.00%

'

'

4.95%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

'

2.50%

'

2.00%

0.90%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.25%

'

'

'

Residual ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12.50%

'

'

'

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Indirect ownership interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of stories

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note payable

'

'

'

'

'

'

'

'

'

'

'

975,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Additional borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of extension options

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

2

'

'

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loan extension period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'1 year

'

'1 year

'

'

'

'1 year

'1 year

'1 year

'

'

'2 years

'1 year

'

'

'

'2 years

'6 months

'

'

'

'

'

'

Extension fee

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

'

'

'

'

'

0.25%

'

'

'

'

0.25%

'

'

0.25%

0.13%

0.25%

0.25%

0.20%

0.25%

0.25%

0.25%

0.25%

0.20%

'

'

'

'

Maximum borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

17,000,000

'

55,500,000

83,113,000

91,000,000

42,500,000

'

73,350,000

77,400,000

57,000,000

23,400,000

100,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notional amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

13,650,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,840,000

50,800,000

'

'

'

1,620,000

69,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of interest in developable land

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of units available for development

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

295

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of approved units available for development

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

252

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Construction reserve

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Internal rate of return

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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18.00%

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10.00%

15.00%

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Bears interest at fixed rate range, minimum

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4.89%

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6.09%

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Bears interest at fixed rate range, maximum

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4.93%

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6.62%

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Loan maturity date

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1-Aug-20

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Letter of credit

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4,600,000

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Mortgage loan face amount

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50,000,000

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Number of properties used to collateralized mortgage

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7

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Threshold of which excess proceeds are paid to another party

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$47,000,000

'

'

'

[1]

The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the Company is not expected to meaningfully participate in the venture's cash flows in the near term.

[2]

Through the joint venture, the Company also owns a 12.5 percent interest in a 50,973 square feet of retail building ("Shops at 40 Park") and a 25 percent interest in a to-be-built 59-unit, five story multi-family rental development property ("Lofts at 40 Park").

[3]

The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the payment of the outstanding balance remaining on a note ($975 as of June 30, 2014), and is not expected to meaningfully participate in the venture's cash flows in the near term.

[4]

Through the joint venture, the Company also owns a 50 percent interest in a land parcel ("Overlook Phase III Land") that can accommodate the development of approximately 240B apartment units.

[5]

The Company also owns a 50 percent interest in a vacant land to accommodate the development of approximately 295 additional units of which 252 are currently approved.

[6]

The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J ("Port Imperial North Land") that can accommodate the development of 836 apartment units.

[7]

The joint venture owns a senior mezzanine loan ("Mezz Loan") with a face value of $50,000 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. The interest-only Mezz Loan has a carrying value of $46,505 and is subject to an agreement that provides, subject to certain conditions, for the payment of principal proceeds above $47,000 to another party. The Mezz loan bears interest at LIBOR plus 325 basis points and matures in August 2014. The joint venture is evaluating its option regarding its investment as the loan approaches maturity.

[8]

The Company owns other interests in various unconsolidated joint ventures, including interests in assets previously owned and interest in ventures whose businesses are related to its core operations. These ventures are not expected to significantly impact the Company's operations in the near term.

[9]

Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.

[10]

The Companybs equity interests in the joint ventures will be subordinated to affiliates of the Keystone Property Group receiving a 15 percent internal rate of return (bIRRb) after which the Company will receive a ten percent IRR on its subordinate equity and then all profit will be split equally.

[11]

Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12. See discussion in Recent Transactions following in this footnote.

[12]

See discussion in Recent Transactions following in this footnote.

[13]

The negative investment balance for this joint venture of $710 and $1,706 as of June 30, 2014 and December 31, 2013, respectively, were included in accounts payable, accrued expenses and other liabilities.

[14]

Property debt balance consists of: (i) a loan, collateralized by the Metropolitan at 40 Park, has a balance of $38,600, bears interest at 3.25 percent, matures in September 2020 and is interest only through September 2015; (ii) loan, collateralized by the Shops at 40 Park, has a balance of $6,500, bears interest at 3.63 percent, matures in August 2018 and is interest-only through July 2015; and (iii) the loan, collateralized by the Lofts at 40 Park, has a balance of $1,117, bears interest at LIBOR plus 250 basis points and matures in September 2015. The Shops at 40 Park mortgage loan also provides for additional borrowing proceeds of $1 million based on certain preferred thresholds being achieved.

[15]

Property debt balance consists of: (i) a loan, collateralized by the Overlook Phase III Land, has a balance of $5,709, bears interest at a rate of LIBOR plus 250 basis points, matures in April 2015 and, subject to certain conditions, provides for a one-year extension option with a fee of 25 basis points, and (ii) the senior loan, collateralized by the Quarrystone property, has a balance of $52,657, bears interest at LIBOR plus 200 basis, matures in March 2016 and (iii) the junior loan, with a balance of $17,000, bears interest at LIBOR plus 90 basis points, matures in March 2016 and is collateralized by a $17,000 letter of credit provided by an affiliate of the partner.

[16]

Principal balance of $127,600 bears interest at 5.114 percent and matures in August 27, 2023; principal balance of $62,577 bears interest at rates ranging from LIBOR+5.0 percent to LIBOR+5.75 percent and matures in August 27, 2016; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures in AugustB 27, 2015.

[17]

Principal balance of $77,650 bears interest at rates ranging from 4.888 percent to 4.93 percent and matures on July 6, 2024; principal balance of $41,240 bears interest at LIBOR+4.95 percent and matures on July 1, 2017.

[18]

Balance includes: (i) mortgage loan, collateralized by the hotel property, has a balance of $62,175, bears interest at 6.15 percent and matures in November 2016, and (ii) loan with a balance of $4.6 million, bears interest at fixed rates ranging from 6.09 percent to 6.62 percent and matures in August 1, 2020. The Company posted a $4.6 million letter of credit in support of this loan, half of which is indemnified by the partner.

[19]

The construction loan has a maximum borrowing amount of $83,113.

[20]

The construction loan has a maximum borrowing amount of $100,700 with amortization starting in August 2017.

[21]

The construction loan has a maximum borrowing amount of $55,500 and provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points each. The joint venture has a swap agreement that fixes the all-in rate to 3.0875 percent per annum on an initial notional amount of $1,840, increasing to $50,800, for the period from September 3, 2013 to November 2, 2015.

[22]

The construction loan has a maximum borrowing amount of $91,000 and provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.

[23]

The construction loan has a maximum borrowing amount of $42,500 and provides, subject to certain conditions, two two-year extension options with a fee of 12.5 basis points for the first two-year extension and 25 basis points for the second two-year extension.

[24]

The construction loan has a maximum borrowing amount of $73,350 and provides, subject to certain conditions, one-year extension option followed by a six-month extension option with a fee of 25 basis points each. The joint venture has a swap agreement that fixes the all-in rate to 2.79 percent per annum on an initial notional amount of $1,620, increasing to $69,500 for the period from July 1, 2013 to January 1, 2016.

[25]

The construction loan has a maximum borrowing amount of $77,400 and provides, subject to certain conditions, two one-year extension options with a fee of 25 basis points for each year.

[26]

The construction loan has a maximum borrowing amount of $57,000 and provides, subject to certain conditions, a one-year extension option with a fee of 25 basis points.

[27]

The construction loan has a maximum borrowing amount of $23,400 and provides, subject to certain conditions, two one-year extension options with a fee of 20 basis points for each year.

[28]

The joint venture has a swap agreement that fixes the all-in rate to 3.99375 percent per annum on an initial notional amount of $13,650 and then adjusting in accordance with an amortization schedule, which is effective from October 17, 2011 through loan maturity.

[29]

The mortgage loan has two one-year extension options, subject to certain conditions, and includes a $25 million construction reserve.

Investments_In_Unconsolidated_5

Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Investments In Unconsolidated Joint Ventures [Abstract]	'	'
Rental property, net	$1,202,271	$755,049
Loan receivable	46,505	45,050
Other assets	486,239	582,990
Total assets	1,735,015	1,383,089
Mortgages and loans payable	844,476	637,709
Other liabilities	211,959	87,231
Partners'/members' capital	678,580	658,149
Total liabilities and partners'/members' capital	$1,735,015	$1,383,089

Investments_In_Unconsolidated_6

Investments In Unconsolidated Joint Ventures (Summary Of Company's Investment In Unconsolidated Joint Ventures) (Details) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

21-May-14

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

In Thousands, unless otherwise specified

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

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

RoseGarden Monaco Holdings, L.L.C. [Member]

RoseGarden Monaco Holdings, L.L.C. [Member]

Rosewood Lafayette Holdings, L.L.C. [Member]

Rosewood Lafayette Holdings, L.L.C. [Member]

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

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

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

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

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

Crystal House Apartments Investors LLC [Member]

Crystal House Apartments Investors LLC [Member]

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

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

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

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

Roseland/Port Imperial Partners, L.P. [Member]

Roseland/Port Imperial Partners, L.P. [Member]

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

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

Estuary Urban Renewal Unit B, LLC [Member]

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

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

Capitol Place Mezz LLC [Member]

Capitol Place Mezz LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

Harborside Unit A Urban Renewal, LLC [Member]

RoseGarden Monaco, L.L.C. [Member]

RoseGarden Monaco, L.L.C. [Member]

Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]

Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]

Red Bank Corporate Plaza, L.L.C. [Member]

Red Bank Corporate Plaza, L.L.C. [Member]

12 Vreeland Associates, L.L.C. [Member]

12 Vreeland Associates, L.L.C. [Member]

BNES Associates III [Member]

BNES Associates III [Member]

Hillsborough 206 Holdings, L.L.C. [Member]

Hillsborough 206 Holdings, L.L.C. [Member]

KPG-P 100 IMW JV, LLC [Member]

KPG-P 100 IMW JV, LLC [Member]

KPG-MCG Curtis JV, LLC [Member]

Curtis Center TIC I And II LLC [Member]

Plaza VIII & IX Associates, L.L.C. [Member]

Plaza VIII & IX Associates, L.L.C. [Member]

Roseland/North Retail, L.L.C. [Member]

Roseland/North Retail, L.L.C. [Member]

South Pier At Harborside [Member]

South Pier At Harborside [Member]

Stamford SM LLC [Member]

Stamford SM LLC [Member]

Other [Member]

Other [Member]

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

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'

'

Company's investments in unconsolidated joint ventures, net

$265,866

$181,129

$15,782

[1]

$15,797

$2,686

[1]

$3,201

$496

[1]

$857

$6,257

[2],[3]

$6,455

$1,950

[1]

$3,117

$203

$26,458

[4]

$26,838

$2,655

[1]

$3,207

$1,685

[1]

$2,206

$1,926

[1],[5]

$2,068

$8,580

[1]

$7,567

$24

$4,247

$3,655

$47,978

$46,628

$22,150

[6]

$30,600

$1,255

$1,224

$337

$337

$3,771

$4,046

$5,658

$5,514

$1,899

$1,753

$1,962

$1,962

$751

$1,887

$2,187

[6]

$61,296

[7]

$3,848

[8]

$3,702

$1,883

[9]

$1,930

'

[10]

'

[10]

$37,418

[8]

$36,258

$751

[9]

$693

Accounts payable, accrued expenses and other liabilities

$140,546

$121,286

'

'

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'

'

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'

'

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'

'

$710

$1,706

'

'

'

'

[1]

The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the Company is not expected to meaningfully participate in the venture's cash flows in the near term.

[2]

Through the joint venture, the Company also owns a 12.5 percent interest in a 50,973 square feet of retail building ("Shops at 40 Park") and a 25 percent interest in a to-be-built 59-unit, five story multi-family rental development property ("Lofts at 40 Park").

[3]

The Company's ownership interests in this venture are subordinate to its partner's preferred capital balance and the payment of the outstanding balance remaining on a note ($975 as of June 30, 2014), and is not expected to meaningfully participate in the venture's cash flows in the near term.

[4]

The Company also owns a 50 percent interest in a vacant land to accommodate the development of approximately 295 additional units of which 252 are currently approved.

[5]

The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J ("Port Imperial North Land") that can accommodate the development of 836 apartment units.

[6]

See discussion in Recent Transactions following in this footnote.

[7]

Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12. See discussion in Recent Transactions following in this footnote.

[8]

The joint venture owns a senior mezzanine loan ("Mezz Loan") with a face value of $50,000 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. The interest-only Mezz Loan has a carrying value of $46,505 and is subject to an agreement that provides, subject to certain conditions, for the payment of principal proceeds above $47,000 to another party. The Mezz loan bears interest at LIBOR plus 325 basis points and matures in August 2014. The joint venture is evaluating its option regarding its investment as the loan approaches maturity.

[9]

The Company owns other interests in various unconsolidated joint ventures, including interests in assets previously owned and interest in ventures whose businesses are related to its core operations. These ventures are not expected to significantly impact the Company's operations in the near term.

[10]

The negative investment balance for this joint venture of $710 and $1,706 as of June 30, 2014 and December 31, 2013, respectively, were included in accounts payable, accrued expenses and other liabilities.

Investments_In_Unconsolidated_7

Investments In Unconsolidated Joint Ventures (Summary Of Results Of Operations Of Unconsolidated Joint Ventures) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Investments In Unconsolidated Joint Ventures [Abstract]	'	'	'	'
Total revenues	$113,118	$91,274	$144,111	$103,693
Operating and other expenses	-96,605	-81,321	-114,958	-89,268
Depreciation and amortization	-8,213	-10,083	-16,581	-13,174
Interest expense	-8,786	-3,310	-15,127	-5,322
Net income (loss)	($486)	($3,440)	($2,555)	($4,071)

Investments_In_Unconsolidated_8

Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	$443		($80)	($792)		($1,830)
Marbella RoseGarden, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-9		-165	-15		-276
RoseGarden Monaco, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-238		-423	-515		-822
Rosewood Lafayette Holdings, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-203		-284	-419		-574
PruRose Port Imperial South 15, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	'		'	'		-606
Rosewood Morristown, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-76		-117	-174		-241
Overlook Ridge JV 2C/3B, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	'		224	62		151
PruRose Riverwalk G, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-613		-192	-1,151		-378
Elmajo Urban Renewal Associates, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-91		-82	-203		-168
Crystal House Apartments Investors LLC [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	53		-1,535	-274		-1,522
Portside Master Company, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-220		-68	-434		-113
PruRose Port Imperial South 13, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-213		-145	-418		-278
Roseland/Port Imperial Partners, L.P. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-180		'	-345		'
RoseGarden Marbella South, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	'		-19	'		-37
Estuary Urban Renewal Unit B, LLC [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	'		-34	-15		-63
Harborside Unit A Urban Renewal, LLC [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-212	[1]	'	-212	[1]	'
Overlook Ridge, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-213		'	-259		'
Grand Jersey Waterfront Urban Renewal Associates, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-16		'	-54		'
Red Bank Corporate Plaza, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	106		106	205		207
12 Vreeland Associates, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	54		116	144		24
BNES Associates III [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	110		-2	147		-71
Hillsborough 206 Holdings, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	'		'	-5		'
KPG-P 100 IMW JV, LLC [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-483		'	-1,136		'
KPG-MCG Curtis JV, LLC [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	251	[2]	'	251	[2]	'
Plaza VIII & IX Associates, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	44		19	146		28
Roseland/North Retail, L.L.C. [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	-23		-83	-47		-132
South Pier At Harborside [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	892		1,056	1,290		545
Stamford SM LLC [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	928		897	1,844		1,782
Other [Member]	'		'	'		'
Schedule of Equity Method Investments [Line Items]	'		'	'		'
Company's equity in earnings (loss) of unconsolidated joint ventures	$795		$651	$795		$714
[1]	See discussion in Recent Transactions following in this footnote.
[2]	Includes undivided interests in the same manner as investments in noncontrolled partnership, pursuant to ASC 970-323-25-12. See discussion in Recent Transactions following in this footnote.

Deferred_Charges_Goodwill_And_2

Deferred Charges, Goodwill And Other Assets (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) (USD $)	Jun. 30, 2014		Dec. 31, 2013		Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified					Mortgage Receivable [Member]	8% Notes Receivable [Member]	3.5% Notes Receivable [Member]	Interest-Free Notes Receivable [Member]
Deferred Charges, Goodwill And Other Assets [Line Items]	'		'		'	'	'	'
Deferred leasing costs	$227,930		$258,648		'	'	'	'
Deferred financing costs	21,916		25,366		'	'	'	'
Deferred charges, gross	249,846		284,014		'	'	'	'
Accumulated amortization	-112,249		-131,669		'	'	'	'
Deferred charges, net	137,597		152,345		'	'	'	'
Notes receivable	83,889	[1]	21,986	[1]	10,400	7,800	62,300	3,400
In-place lease values, related intangible and other assets, net	9,515		13,659		'	'	'	'
Goodwill	2,945		2,945		'	'	'	'
Prepaid expenses and other assets, net	32,814		27,584		'	'	'	'
Total deferred charges, goodwill and other assets	$266,760		$218,519		'	'	'	'
Spread over LIBOR	'		'		6.00%	'	'	'
Interest rate	'		'		'	8.00%	3.50%	'
[1]	Includes: a mortgage receivable for $10.4 million which bears interest at LIBOR plus six percent; a note receivable for $7.8 million which bears interest at eight percent; notes receivable for $62.3 million which bear interest at 3.5 percent (See Note 4: Unconsolidated joint ventures - Recent Transactions); and an interest-free note r

Restricted_Cash_Details

Restricted Cash (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Restricted Cash [Abstract]	'	'
Security deposits	$8,782	$8,534
Escrow and other reserve funds	17,623	11,260
Total restricted cash	$26,405	$19,794

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
	item	item
	sqft	property
		sqft
Discontinued Operations [Abstract]	'	'
Number of properties sold	9	24
Area of property sold	1,694,563	3,000,000
Number of land parcels sold	'	3
Sales proceeds	$235,322	$390,600

Discontinued_Operations_Summar

Discontinued Operations (Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2013		Jun. 30, 2013
Discontinued Operations [Abstract]	'		'
Total revenues	$12,333		$27,205
Operating and other expenses	-4,778		-10,982
Depreciation and amortization	-2,989		-6,442
Interest expense (net of interest income)	-36		-118
Income from discontinued operations	4,530		9,663
Loss from early extinguishment of debt	-703		-703
Impairments	-23,851	[1]	-23,851	[1]
Realized gains on disposition of rental property	37,609		37,609
Realized gains (losses) and unrealized losses on disposition of rental property, net	13,758		13,758
Total discontinued operations	$17,585		$22,718
[1]	Represents impairment charges recorded on certain properties prior to their sale.

Senior_Unsecured_Notes_Summary

Senior Unsecured Notes (Summary Of Senior Unsecured Notes) (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes	$1,417,141		$1,616,575
5.125% Senior Unsecured Notes, Due February 15, 2014 [Member]	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes	'		200,030	[1]
Effective Rate	5.11%	[1],[2]	'
Interest rate of senior unsecured notes	5.13%	[1]	'
Maturity date of the senior unsecured notes	15-Feb-14	[1]	'
5.125% Senior Unsecured Notes, Due January 15, 2015 [Member]	'		'
Debt Instrument [Line Items]	'		'
Senior Unsecured Notes	149,948		149,902
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	200,123		200,161
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	249,003		248,855
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	248,906		248,799
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	299,535		299,505
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	$269,626		$269,323
Effective Rate	3.52%	[2]	'
Interest rate of senior unsecured notes	3.15%		'
Maturity date of the senior unsecured notes	15-May-23		'
[1]	On February 17, 2014, the Company repaid these notes at their maturity using available cash and borrowings on the Companybs unsecured revolving credit facility.
[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 $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jul. 15, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014
			Unsecured Revolving Credit Facility [Member]	Unsecured Revolving Credit Facility Extension 1 [Member]	Unsecured Revolving Credit Facility Extension 2 [Member]	Previous Unsecured Revolving Credit Facility [Member]	Money Market Loan [Member]	Money Market Loan [Member]	Minimum [Member]	Maximum [Member]	Maximum [Member]
			item						Unsecured Revolving Credit Facility [Member]	Unsecured Revolving Credit Facility [Member]	Money Market Loan [Member]
			entity						item
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	'	'	'	0.08%	0.08%	0.25%	'	'	'	'	'
Line of credit facility, bid feature, current borrowing capacity	'	'	300,000,000	'	'	'	'	'	'	'	'
Leverage ratio	'	'	'	'	'	'	'	'	'	60.00%	'
Secured indebtedness	'	'	'	'	'	'	'	'	'	40.00%	'
Fixed charge coverage ratio	'	'	'	'	'	'	'	'	1.5	'	'
Unsecured indebtedness	'	'	'	'	'	'	'	'	'	60.00%	'
Unencumbered property interest coverage	'	'	'	'	'	'	'	'	2	'	'
Investment limitations as a percentage of total capitalization	'	'	'	'	'	'	'	'	'	15.00%	'
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 (60 percent), the maximum amount of secured indebtedness (40 percent), the minimum amount of fixed charge coverage (1.5 times), the maximum amount of unsecured indebtedness (60 percent), the minimum amount of unencumbered property interest coverage (2.0 times) and certain investment limitations (generally 15 percent of total capitalization).	'	'	'	'	'	'	'	'
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. The Company was in compliance with its debt covenants as of June 30, 2014.	'	'	'	'	'	'	'	'
Outstanding borrowings under the facility	$56,000,000	$0	'	'	'	'	$0	$0	'	'	'
Property Debt, Interest Rate, 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) (Unsecured Revolving Credit Facility [Member])	6 Months Ended
	Jun. 30, 2014
No Ratings Or Less Than BBB-/Baa3 [Member]	'
Line of Credit Facility [Line Items]	'
Unsecured Debt Ratings	'No ratings or less than BBB-/Baa3
Interest Rate - Applicable Basis Points Above LIBOR	1.70%
Facility Fee Basis Points	0.35%
BBB- Or Baa3 [Member]	'
Line of Credit Facility [Line Items]	'
Unsecured Debt Ratings	'BBB- or Baa3
Interest Rate - Applicable Basis Points Above LIBOR	1.30%
Facility Fee Basis Points	0.30%
BBB Or Baa2 (Current) [Member]	'
Line of Credit Facility [Line Items]	'
Unsecured Debt Ratings	'BBB or Baa2(current)
Interest Rate - Applicable Basis Points Above LIBOR	1.10%
Facility Fee Basis Points	0.20%
BBB+ Or Baa1 [Member]	'
Line of Credit Facility [Line Items]	'
Unsecured Debt Ratings	'BBB+ or Baa1
Interest Rate - Applicable Basis Points Above LIBOR	1.00%
Facility Fee Basis Points	0.15%
A-Or A3 Or Higher [Member]	'
Line of Credit Facility [Line Items]	'
Unsecured Debt Ratings	'A- or A3 or higher
Interest Rate - Applicable Basis Points Above LIBOR	0.93%
Facility Fee Basis Points	0.13%

Mortgages_Loans_Payable_And_Ot2

Mortgages, Loans Payable And Other Obligations (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
	property
Debt Instrument [Line Items]	'	'	'
Number of properties with encumbered company mortgages	27	'	'
Book value of encumbered properties	$879,000,000	'	'
Cash paid for interest	61,999,000	60,838,000	'
Interest capitalized	6,493,000	6,748,000	'
Total indebtedness	2,208,268,000	'	2,362,766,000
Total indebtedness, weighted average interest rate	5.51%	'	5.62%
Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total indebtedness	164,363,000	'	80,228,000
Total indebtedness, weighted average interest rate	2.11%	'	2.74%
Fixed Rate Debt And Other Obligations [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Total indebtedness	2,043,905,000	'	2,282,538,000
Total indebtedness, weighted average interest rate	5.78%	'	5.72%
Unconsolidated Joint Venture [Member]	'	'	'
Debt Instrument [Line Items]	'	'	'
Interest capitalized	$1,953,000	$584,000	'

Mortgages_Loans_Payable_And_Ot3

Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details) (USD $)

3 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Jun. 30, 2013

Jun. 30, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

6301 Ivy Lane [Member]

6301 Ivy Lane [Member]

395 West Passaic [Member]

395 West Passaic [Member]

35 Waterview Boulevard [Member]

35 Waterview Boulevard [Member]

233 Canoe Brook Road [Member]

233 Canoe Brook Road [Member]

6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]

6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]

4 Sylvan [Member]

4 Sylvan [Member]

10 Independence [Member]

10 Independence [Member]

Port Imperial South 4/5 [Member]

Port Imperial South 4/5 [Member]

9200 Edmonston Road [Member]

9200 Edmonston Road [Member]

Port Imperial South [Member]

Port Imperial South [Member]

4 Becker [Member]

4 Becker [Member]

5 Becker [Member]

5 Becker [Member]

210 Clay [Member]

210 Clay [Member]

Various [Member]

Various [Member]

150 Main St [Member]

23 Main Street [Member]

23 Main Street [Member]

Harborside Plaza 5 [Member]

Harborside Plaza 5 [Member]

100 Walnut Avenue [Member]

100 Walnut Avenue [Member]

One River Center [Member]

One River Center [Member]

Park Square [Member]

property

property

property

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property Name

'

'

'

'

'6301 Ivy Lane (b)

[1]

'

'395 West Passaic (c)

[2]

'

'35 Waterview Boulevard (d)

[3]

'

'233 Canoe Brook Road (e)

[4]

'

'6 Becker, 85 Livingston, 75 Livingston & 20 Waterview

[5]

'

'4 Sylvan

'

'10 Independence (g)

[6]

'

'Port Imperial South 4/5

'

'9200 Edmonston Road (h)

[7]

'

'Port Imperial South

'

'4 Becker

'

'5 Becker (i)

[8]

'

'210 Clay

'

'Various (j)

[9]

'

'150 Main St.

'23 Main Street

'

'Harborside Plaza 5

'

'100 Walnut Avenue

'

'One River Center (k)

[10]

'

'Park Square

Lender

'

'

'

'

'RGA Reinsurance Company

[1]

'

'State Farm Life Insurance Co.

[2]

'

'Wells Fargo CMBS

[3]

'

'The Provident Bank

[4]

'

'Wells Fargo CMBS

[5]

'

'Wells Fargo CMBS

'

'Wells Fargo CMBS

[6]

'

'Wells Fargo Bank N.A.

'

'Principal Commercial Funding L.L.C.

[7]

'

'Wells Fargo Bank N.A.

'

'Wells Fargo CMBS

'

'Wells Fargo CMBS

[8]

'

'Wells Fargo CMBS

'

'Prudential Insurance

[9]

'

'Webster Bank

'JPMorgan CMBS

'

'The Northwestern Mutual Life Insurance Co. & New York Life Insurance Co.

'

'Guardian Life Insurance Co.

'

'Guardian Life Insurance Co.

[10]

'

'Wells Fargo Bank N.A.

LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'LIBOR+3.50

[11]

'

'

'

'LIBOR+1.75

[11]

'

'

'

'

'

'

'

'

'

'LIBOR+2.35

[11]

'

'

'

'

'

'

'

'

'

Effective Rate

'

'

'

'

5.52%

[1],[11]

'

6.00%

[11],[2]

'

6.35%

[11],[3]

'

4.38%

[11],[4]

'

10.22%

[11],[5]

'

10.19%

[11]

'

12.44%

[11],[6]

'

'

'

5.53%

[11],[7]

'

'

'

9.55%

[11]

'

12.83%

[11],[8]

'

13.42%

[11]

'

6.33%

[11],[9]

'

'

5.59%

[11]

'

6.84%

[11]

'

7.31%

[11]

'

7.31%

[10],[11]

'

1.75%

[11]

Property Debt, Interest Rate, Spread Over LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.50%

'

'

'

1.75%

'

'

'

'

'

'

'

'

'

2.35%

'

'

'

'

'

'

'

'

1.75%

Mortgages, loans payable and other obligations

'

'

$735,127

$746,191

'

$5,447

[1]

'

$9,719

[2]

'

$18,417

[3]

'

$3,877

[4]

$64,829

[5]

$64,233

[5]

$14,565

$14,538

$16,850

[6]

$16,638

[6]

$36,950

$36,950

$4,026

[7]

$4,115

[7]

$43,697

$43,278

$39,108

$38,820

$13,467

[8]

$13,092

[8]

$13,039

$12,767

$146,532

[9]

$147,477

[9]

$217

$29,529

$29,843

$223,381

$225,139

$18,669

$18,792

$42,768

[10]

$43,049

[10]

$27,500

Loan maturity date

'

'

'

'

'

'

'

'

'

'

'

'

11-Aug-14

[12],[5]

'

11-Aug-14

[12]

'

11-Aug-14

[6]

'

30-Aug-14

'

1-May-15

[7]

'

19-Sep-15

'

11-May-16

'

11-May-16

[8]

'

11-May-16

'

15-Jan-17

[9]

'

30-Mar-17

1-Sep-18

'

1-Nov-18

'

1-Feb-19

'

1-Feb-19

[10]

'

10-Apr-19

Loss from early extinguishment of debt

$703

$703

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of properties used to collateralized mortgage

'

'

'

'

'

'

'

'

'

'

'

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7

'

'

'

'

'

'

'

'

3

'

'

[1]

On April 1, 2014, the Company repaid the mortgage loan at par, using available cash.

[2]

On May 1, 2014, the Company repaid the mortgage loan at par, using available cash.

[3]

On May 12, 2014, the Company repaid the mortgage loan at par, using borrowings on the Companybs unsecured revolving credit facility.

[4]

On April 30, 2014, the Company repaid the mortgage loan at par, using available cash.

[5]

Mortgage is cross collateralized by the four properties.

[6]

The Company is negotiating a deed-in-lieu of foreclosure in satisfaction of this mortgage loan.

[7]

The mortgage loan originally matured on May 1, 2013. The maturity date was extended until May 1, 2015 with the same interest rate. Excess cash flow, as defined, is being held by the lender for re-leasing costs. The deed for the property was placed in escrow and is available to the lender in the event of default or non-payment at maturity.

[8]

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 deed-in-lieu of foreclosure and began remitting available cash flow to the lender effective August 2013.

[9]

Mortgage is cross collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.

[10]

Mortgage is collateralized by the three properties comprising One River Center.

[11]

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.

[12]

The Company has begun discussions with the lender to extend the maturity date and modify the loan terms.

Employee_Benefit_401k_Plans_An1

Employee Benefit 401(k) Plans And Deferred Retirement Compensation Agreements (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013
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	$27,000	$29,000	$53,000		$67,000
Shares granted	'	'	208,589	[1]	'
Shares issued for accrued dividends	'	'	836		'
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 Lefkowitz And Messr Thomas [Member]	'	'	'		'
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'		'
Expenses for employee benefit plan	'	'	1,200,000		'
Messr Hersh [Member]	'	'	'		'
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'		'
Amount of annual employer contribution to deferred retirement compensation	'	'	500,000		'
Deferred Retirement Compensation Units [Member]	'	'	'		'
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]	'	'	'		'
Expenses for employee benefit plan	$142,000	$153,000	$1,300,000		$341,000
Shares granted	'	'	36,218		'
[1]	Includes 42,000 Performance Shares which were legally granted in 2013 for which the 2014 performance goals were set by the Committee on March 31, 2014. Also includes 87,734 shares which were additionally granted to two executive officers in connection with their departure affective March 31, 2014 and which vested on April 1, 2014.

Disclosure_Of_Fair_Value_Of_Fi1

Disclosure Of Fair Value Of Financial Instruments (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Disclosure Of Fair Value Of Financial Instruments [Abstract]	'	'
Fair value of Company's long-term debt	$2,261,079,000	$2,407,802,000
Book value of Company's long-term debt	$2,208,268,000	$2,362,766,000

Commitments_And_Contingencies_1

Commitments And Contingencies (Tax Abatement Agreements) (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Harborside Financial Center Plaza 4-A [Member]	'	'	'	'
Commitments And Contingencies [Line Items]	'	'	'	'
Project period	'	'	'20 years	'
Percentage of PILOT on project costs	'	'	2.00%	'
Total project costs	'	'	$49,500,000	'
Payments in lieu of property taxes (PILOT)	247,000	247,000	495,000	495,000
Harborside Financial Center Plaza 5 [Member]	'	'	'	'
Commitments And Contingencies [Line Items]	'	'	'	'
Project period	'	'	'20 years	'
Percentage of PILOT on project costs	'	'	2.00%	'
Total project costs	'	'	170,900,000	'
Payments in lieu of property taxes (PILOT)	$854,000	$854,000	$1,700,000	$1,700,000
Port Imperial 4/5 Garage Development [Member]	'	'	'	'
Commitments And Contingencies [Line Items]	'	'	'	'
Project period	'	'	'5 years	'
Period of real estate taxes phase in	'	'	'5 years	'
Park Square [Member]	'	'	'	'
Commitments And Contingencies [Line Items]	'	'	'	'
Period of partial abatement of real estate taxes	'	'	'4 years	'

Commitments_And_Contingencies_2

Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commitments And Contingencies [Abstract]	'	'	'	'
Ground lease expense incurred	$102,000	$102,000	$203,000	$203,000

Commitments_And_Contingencies_3

Commitments And Contingencies (Roseland Contingent Consideration) (Narrative) (Details) (USD $)

3 Months Ended

6 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Mar. 21, 2014

Jan. 25, 2014

Apr. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Sep. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

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 Assets [Member]

Completion Of Certain Developments [Member]

Start Of Construction On Certain Developments [Member]

Completion/Start Of Certain Developments [Member]

Completion/Start Of Certain Developments [Member]

Obtaining Of Tax Credits/Grants [Member]

Obtaining Of Tax Credits/Grants [Member]

Obtaining Of Tax Credits/Grants [Member]

Total Return To Shareholders [Member]

Failure To Achieve Certain Level Of Fee Revenue [Member]

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

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

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

Minimum [Member]

Maximum [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]

Scenario, Forecast [Member]

Business Acquisition, Contingent Consideration [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of contingent consideration

'

'

'

'

'

'

'

$10,000,000

$10,000,000

$6,300,000

'

'

'

'

'

'

'

$3,700,000

'

Business acquisition, contingent cash payment

'

'

'

'

'

'

'

15,600,000

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

'

Interest and other investment income

922,000

1,094,000

1,308,000

1,100,000

'

'

'

380,000

'

'

'

'

'

'

'

'

'

'

'

Purchase accounting adjustments

'

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

Earn out paid

'

'

3,936,000

2,755,000

1,400,000

2,800,000

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

Probability of occurrence

'

'

'

'

'

'

'

'

'

'

'

'

92.00%

99.00%

50.00%

'

'

'

'

Contingent purchase price measurement period

'

'

'

'

'

'

'

'

'33 months

'

'

'

'

'

'

'

'

'

'

Amount of cash deposited to escrow

'

'

'

'

'

'

'

'

34,000,000

'

'

'

'

'

'

'

'

'

'

Amount of escrow released

'

'

'

'

'

'

$6,700,000

'

'

'

'

'

'

'

'

'

'

'

'

Commitments_And_Contingencies_4

Commitments And Contingencies (Departure Of Executive Vice Presidents) (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Sep. 30, 2014
	item	Messr Lefkowitz [Member]	Messr Thomas [Member]	Scenario, Forecast [Member]
				Messr Thomas [Member]
Commitments And Contingencies [Line Items]	'	'	'	'
Severance benefits	$11,000,000	$3,400,000	$3,100,000	'
Stock options vested	'	11,457	33,605	'
Restricted stock units vested	183,214	68,667	41,000	'
Period for continuation of health insurance	'	'48 months	'48 months	'
Consulting payment	'	'	'	$300,000
Number of executive officers who departed	2	'	'	'

Commitments_And_Contingencies_5

Commitments And Contingencies (Roseland Transaction Modifications) (Narrative) (Details) (USD $)

6 Months Ended

0 Months Ended

6 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Mar. 21, 2014

Jan. 25, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Oct. 23, 2015

Apr. 24, 2015

Oct. 28, 2014

Jun. 30, 2014

Sep. 30, 2014

Minimum [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]

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]

Messr Goldberg [Member]

Messr Klatt And Messr Goldberg [Member]

Messr Tycher [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Scenario, Forecast [Member]

Obtaining Of Tax Credits/Grants [Member]

Obtaining Of Tax Credits/Grants [Member]

Minimum [Member]

Messr Goldberg [Member]

Messr Klatt And Messr Goldberg [Member]

Messr Klatt And Messr Goldberg [Member]

Scenario, Forecast [Member]

item

Commitments And Contingencies [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Consulting payment

'

'

'

'

'

'

'

'

'

$400,000

'

'

'

'

Consulting period

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

Period for continuation of health insurance

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

Number of installments

'

'

'

'

'

'

'

'

'

4

'

'

'

'

Severance benefits

11,000,000

'

'

'

'

'

'

'

'

'

500,000

750,000

'

'

Percentage of interest in venture

'

'

7.50%

'

'

'

'

'

50.00%

'

'

'

'

'

Earn out paid

3,936,000

2,755,000

'

1,400,000

2,800,000

'

'

'

'

'

'

'

'

1,000,000

Business acquisition, contingent cash payment

'

'

'

'

'

$15,600,000

'

'

'

'

'

'

$3,000,000

'

Commitments_And_Contingencies_6

Commitments And Contingencies (Joint Venture Interests Agreement And Other) (Narrative) (Details) (USD $)	6 Months Ended						3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Jul. 31, 2012	Sep. 30, 2014	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2014
			Property Lock-Ups [Member]	Property Lock-Ups Expired [Member]	Wegmans Food Markets, Inc. [Member]	Wegmans Food Markets, Inc. [Member]	Overlook Ridge Properties [Member]	Development Property [Member]	Multi-Family Properties [Member]	Multi-Family Properties [Member]
			property	property		sqft	Scenario, Forecast [Member]	Overlook Ridge Properties [Member]	item	Overlook Ridge Properties [Member]
								Scenario, Forecast [Member]		Scenario, Forecast [Member]
								item		property
Commitments And Contingencies [Line Items]	'	'	'	'	'	'	'	'	'	'
Acquisition cost	$38,948,000	$31,500,000	'	'	'	'	$16,600,000	'	'	'
Percentage of interest in venture	'	'	'	'	'	'	'	100.00%	'	50.00%
Number of apartments	'	'	'	'	'	'	'	1,167	3,898	'
Number of properties	'	'	7	115	'	'	'	'	'	2
Properties aggregate net book value	'	'	123,500,000	1,400,000,000	'	'	'	'	'	'
Expiration year	'	'	'2016	'	'	'	'	'	'	'
Costs of the project incurred	'	'	'	'	6,400,000	'	'	'	'	'
Delivery date to tenant	'	'	'	'	'first quarter of 2015	'	'	'	'	'
Area of property (in square feet)	'	'	'	'	'	140,000	'	'	'	'
Total project costs	'	'	'	'	$15,700,000	'	'	'	'	'

Commitments_And_Contingencies_7

Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Commitments And Contingencies [Abstract]	'
July 1 through December 31, 2014	$184
2015	371
2016	371
2017	267
2018	232
2019 through 2084	15,819
Total	$17,244

Tenant_Leases_Details

Tenant Leases (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Property Subject to or Available for Operating Lease [Line Items]	'
July 1 through December 31, 2014	243,001
2015	451,877
2016	409,744
2017	357,438
2018	274,021
2019 and thereafter	1,045,178
Total	2,781,259
Tenant Leases [Member]	'
Property Subject to or Available for Operating Lease [Line Items]	'
Operating leases with various expiration dates through year	31-Dec-35
Multi-Family Properties [Member]	'
Property Subject to or Available for Operating Lease [Line Items]	'
Lease period	'1 year

MackCali_Realty_Corporation_St2

Mack-Cali Realty Corporation Stockholders' Equity (Preferred Stock, Share Repurchase Program And Dividend Reinvestment And Stock Purchase Plan) (Narrative) (Details) (USD $)	6 Months Ended	22 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Mack Cali Realty Corporation Stockholders Equity [Line Items]	'	'
Date share repurchase program was initiated	'September 2012	'
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	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

6 Months Ended

12 Months Ended

6 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Dec. 31, 2013

31-May-13

Jun. 30, 2014

31-May-04

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

2013 Incentive Stock Plan [Member]

2004 Incentive Stock Plan [Member]

2004 Incentive Stock Plan [Member]

Employee And Director Plan [Member]

Employee And Director Plan [Member]

2000 Employee Plan [Member]

2000 Employee Plan [Member]

2000 Employee Plan [Member]

2000 Director Plan [Member]

2000 Director Plan [Member]

2000 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

'

'

'5 years 4 months 24 days

'

'8 months 12 days

'

'

'

'

'

'

'

'

'

'

'

Share price

$1.71

'

$1.71

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from stock options exercised

$0

$0

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

Total intrinsic value of options exercised

0

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

Stock options expense

$1,000

$0

$2,000

$0

'

'

'

'

'

'

'

'

'

'

'

'

MackCali_Realty_Corporation_St4

Mack-Cali Realty Corporation Stockholders' Equity (Restricted Stock Awards And TSR-Based Awards) (Narrative) (Details) (USD $)

6 Months Ended

12 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

12 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Sep. 12, 2012

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Sep. 12, 2012

Jun. 30, 2014

Dec. 31, 2013

item

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Restricted Stock [Member]

Ratified Restricted Stock Awards [Member]

Ratified Restricted Stock Awards [Member]

Ratified Restricted Stock Awards [Member]

Ratified Restricted Stock Awards [Member]

Ratified Restricted Stock Awards [Member]

Total Stockholder Return Based Awards [Member]

Total Stockholder Return Based Awards [Member]

Total Stockholder Return Based Awards [Member]

Minimum [Member]

Maximum [Member]

Minimum [Member]

Maximum [Member]

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock compensation vesting period

'

'

'

'

'1 year

'7 years

'

'

'

'5 years

'7 years

'

'4 years

'

Unvested performance shares

42,000

63,933

'

'

'

'

'

'

63,933

'

'

'

'

'

Number of executive officers who departed

2

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares vested

183,214

'

'

'

'

'

'

109,667

'

'

'

'

357

'

Shares granted and vested

'

'

'

'

'

'

'

'

'

'

'

'

528

'

Unvested restricted stock outstanding

178,816

153,560

[1]

304,816

352,358

'

'

'

'

'

'

'

'

'

'

Restricted stock awards unvested shares outstanding, performance contingent

'

'

210,000

'

'

'

'

'

'

'

'

'

'

'

Awards issued

208,589

[2]

'

'

'

'

'

319,667

'

'

'

'

5,160

'

1,032

Value of common stock received upon vesting of awards

'

'

'

'

'

'

'

'

'

'

'

'

$1,000

'

Shares issued

'

'

'

'

'

'

'

'

'

'

'

'

45,062

'

Total unrecognized compensation cost

'

'

'

'

'

'

'

'

'

'

'

'

$2.50

'

Total unrecognized compensation cost, period of recognition

'

'

'

'

'

'

'

'

'

'

'

'

'1 year 3 months 18 days

'

[1]

Includes 63,933 Performance Shares which were legally granted in 2013 for which the 2013 performance goals were not met, which may be earned if subsequent yearsb performance goals are met.

[2]

Includes 42,000 Performance Shares which were legally granted in 2013 for which the 2014 performance goals were set by the Committee on March 31, 2014. Also includes 87,734 shares which were additionally granted to two executive officers in connection with their departure affective March 31, 2014 and which vested on April 1, 2014.

MackCali_Realty_Corporation_St5

Mack-Cali Realty Corporation Stockholders' Equity (Deferred Stock Compensation Plan For Directors) (Narrative) (Details)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]	'	'	'
Maximum percentage of retainer fee that directors may defer	100.00%	'	'
Deferred stock units earned	10,245	10,372	'
Deferred stock units outstanding	148,208	'	136,440

MackCali_Realty_Corporation_St6

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share) (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Anti-dilutive securities excluded from the computation of earnings per share	'	15,000	10,000	'	'
Dividends declared per common share	$0.15	$0.30	$0.45	$0.60	'
Unvested restricted stock outstanding	178,816	'	178,816	'	153,560	[1]
Restricted Stock [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Unvested restricted stock outstanding	304,816	352,358	304,816	352,358	'
[1]	Includes 63,933 Performance Shares which were legally granted in 2013 for which the 2013 performance goals were not met, which may be earned if subsequent yearsb performance goals are met.

MackCali_Realty_Corporation_St7

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Stock Option Plans) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]	'
Shares Under Options - Outstanding, beginning balance	15,000
Shares Under Options - Granted	5,000
Shares Under Options - Lapsed or Cancelled	-10,000
Shares Under Options - Outstanding, ending balance	10,000
Shares Under Options - Options exercisable	5,000
Shares Under Options - Available for grant	4,466,143
Weighted Average Exercise Price - Outstanding, beginning balance	$40.54
Weighted Average Exercise Price - Granted	$21.25
Weighted Average Exercise Price - Lapsed or Cancelled	$38.07
Weighted Average Exercise Price - Outstanding, ending balance	$33.36
Outstanding stock option price range, lower range	$21.25
Outstanding stock option price range, upper range	$45.47

MackCali_Realty_Corporation_St8

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Weighted Average Assumptions) (Details)	6 Months Ended
	Jun. 30, 2014
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]	'
Expected life (in years)	'6 years
Risk-free interest rate	1.50%
Volatility	20.26%
Dividend yield	5.65%

MackCali_Realty_Corporation_St9

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Restricted Stock Awards) (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
	item
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Shares, Outstanding, Beginning balance	153,560	[1]	'
Shares, Granted	208,589	[2]	'
Shares, Vested	-183,214		'
Shares, Forfeited	-119		'
Shares, Outstanding, Ending balance	178,816		153,560	[1]
Weighted-Average Grant-Date Fair Value, Outstanding beginning balance	$25.20	[1]	'
Weighted-Average Grant-Date Fair Value, Granted	$20.83	[2]	'
Weighted-Average Grant-Date Fair Value, Vested	$22.37		'
Weighted-Average Grant-Date Fair Value, Forfeited	$26.36		'
Weighted-Average Grant-Date Fair Value, Outstanding ending balance	$23		$25.20	[1]
Unvested performance shares	42,000		63,933
Number of executive officers who departed	2		'
Executive Officer [Member]	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'
Shares, Granted	87,734		'
[1]	Includes 63,933 Performance Shares which were legally granted in 2013 for which the 2013 performance goals were not met, which may be earned if subsequent yearsb performance goals are met.
[2]	Includes 42,000 Performance Shares which were legally granted in 2013 for which the 2014 performance goals were set by the Committee on March 31, 2014. Also includes 87,734 shares which were additionally granted to two executive officers in connection with their departure affective March 31, 2014 and which vested on April 1, 2014.

Recovered_Sheet1

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Basic Computation Of EPS) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]	'	'	'	'
Income from continuing operations	$57,347	$8,599	$39,719	$16,555
Add: Noncontrolling interest in consolidated joint ventures	290	62	612	124
Add (deduct): Noncontrolling interest in Operating Partnership	-6,514	-1,048	-4,506	-2,021
Income (loss) from continuing operations available to common shareholders	51,123	7,613	35,825	14,658
Income from discontinued operations available to common shareholders	'	15,458	'	19,969
Net income available to common shareholders	$51,123	$23,071	$35,825	$34,627
Weighted average common shares	88,691	87,708	88,491	87,688
Income from continuing operations available to common shareholders	$0.58	$0.09	$0.40	$0.16
Income from discontinued operations available to common shareholders	'	$0.17	'	$0.23
Net income available to common shareholders	$0.58	$0.26	$0.40	$0.39

Recovered_Sheet2

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]	'	'	'	'
Income (loss) from continuing operations attributable to common shareholders	$51,123	$7,613	$35,825	$14,658
(Deduct) add: Noncontrolling interest in Operating Partnership	6,514	1,048	4,506	2,021
Income (loss) from continuing operations for diluted earnings per share	57,637	8,661	40,331	16,679
Income from discontinued operations for diluted earnings per share	'	17,585	'	22,718
Net income (loss) available to common shareholders	$57,637	$26,246	$40,331	$39,397
Weighted average common shares	100,023	99,895	99,964	99,892
Income from continuing operations available to common shareholders	$0.58	$0.09	$0.40	$0.16
Income from discontinued operations available to common shareholders	'	$0.17	'	$0.23
Net income available to common shareholders	$0.58	$0.26	$0.40	$0.39

Recovered_Sheet3

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		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]	'	'	'	'
Basic EPS shares	88,691	87,708	88,491	87,688
Add: Operating Partnership - common units	11,302	12,072	11,444	12,085
Restricted Stock Awards	30	115	29	119
Diluted EPS Shares	100,023	99,895	99,964	99,892

Noncontrolling_Interests_In_Su2

Noncontrolling Interests In Subsidiaries (Narrative) (Details) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Noncontrolling Interest [Line Items]	'	'
Number of common shares received upon redemption of common units	1	'
Rebalance of ownership percentage	$0.20	'
Percentage of noncontrolling interest	11.10%	11.90%
Participation Rights [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Number of properties	3	'
Excess net cash flow remaining after the distribution to the Company	50.00%	'
Internal rate of return	10.00%	'
Future Developments [Member] | Participation Rights [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Number of properties	1	'

Noncontrolling_Interests_In_Su3

Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details)	6 Months Ended
	Jun. 30, 2014	Jul. 03, 2014	Jan. 06, 2014
Noncontrolling Interests In Subsidiaries [Abstract]	'	'	'
Balance, Beginning	11,864,775	11,161,018	11,864,775
Redemption of common units for shares of common stock	-700,757	'	'
Balance, Ending	11,164,018	11,161,018	11,864,775

Segment_Reporting_Narrative_De

Segment Reporting (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
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	'

Segment_Reporting_Selected_Res

Segment Reporting (Selected Results Of Operations And Asset Information) (Details) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	$160,300		$168,346		$329,896		$339,259		'
Total operating and interest expenses	113,269	[1]	114,002	[1]	254,273	[1]	231,861	[1]	'
Equity in earnings (loss) of unconsolidated joint ventures	443		-80		-792		-1,830		'
Net operating income (loss)	47,474	[2]	54,264	[2]	74,831	[2]	105,568	[2]	'
Total assets	4,354,772		'		4,354,772		'		4,515,328
Total long-lived assets	3,706,487	[3]	'		3,706,487	[3]	'		3,868,193	[3]
Investments in unconsolidated joint ventures	265,866		'		265,866		'		181,129
Real Estate - Commercial And Other [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	150,877		155,249		311,450		313,897		'
Total operating and interest expenses	72,303	[1]	65,889	[1]	159,236	[1]	136,282	[1]	'
Equity in earnings (loss) of unconsolidated joint ventures	1,829		2,845		2,817		3,230		'
Net operating income (loss)	80,403	[2]	92,205	[2]	155,031	[2]	180,845	[2]	'
Total assets	3,796,166		'		3,796,166		'		3,886,574
Total long-lived assets	3,421,351	[3]	'		3,421,351	[3]	'		3,620,494	[3]
Investments in unconsolidated joint ventures	116,829		'		116,829		'		53,160
Real Estate - Multi Family [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	6,329		3,655		12,132		4,937		'
Total operating and interest expenses	3,006	[1]	1,568	[1]	5,705	[1]	2,104	[1]	'
Equity in earnings (loss) of unconsolidated joint ventures	-2,255		-2,925		-4,478		-5,060		'
Net operating income (loss)	1,068	[2]	-838	[2]	1,949	[2]	-2,227	[2]	'
Total assets	398,190		'		398,190		'		377,237
Total long-lived assets	277,734	[3]	'		277,734	[3]	'		240,501	[3]
Investments in unconsolidated joint ventures	148,286		'		148,286		'		127,276
Multi Family Services [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	7,403	[4]	6,394	[5]	14,351	[6]	11,878	[7]	'
Total operating and interest expenses	8,382	[1]	7,657	[1]	18,541	[1]	15,132	[1]	'
Equity in earnings (loss) of unconsolidated joint ventures	869		'		869		'		'
Net operating income (loss)	-110	[2]	-1,263	[2]	-3,321	[2]	-3,254	[2]	'
Total assets	9,004		'		9,004		'		10,488
Total long-lived assets	3,923	[3]	'		3,923	[3]	'		3,468	[3]
Investments in unconsolidated joint ventures	751		'		751		'		693
Fee revenue	935		571		1,800		767		'
Corporate & Other [Member]	'		'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'		'
Total revenues	-4,309	[8]	3,048	[8]	-8,037	[8]	8,547	[8]	'
Total operating and interest expenses	29,578	[1],[8]	38,888	[1],[8]	70,791	[1],[8]	78,343	[1],[8]	'
Net operating income (loss)	-33,887	[2],[8]	-35,840	[2],[8]	-78,828	[2],[8]	-69,796	[2],[8]	'
Total assets	151,412	[8]	'		151,412	[8]	'		241,029	[8]
Total long-lived assets	$3,479	[3],[8]	'		$3,479	[3],[8]	'		$3,730	[3],[8]
[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 and goodwill.
[4]	Includes $935 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
[5]	Includes $571 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
[6]	Includes $1,800 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
[7]	Includes $767 of fees earned for this period from the multi-family real estate segment, which are eliminated in consolidation.
[8]	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				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting [Abstract]	'		'		'		'
Net operating income	$47,474	[1]	$54,264	[1]	$74,831	[1]	$105,568	[1]
Depreciation and amortization	-44,711		-45,665		-89,696		-89,013
Realized gains and unrealized losses on disposition of rental property, net	54,584		'		54,584		'
Income from continuing operations	57,347		8,599		39,719		16,555
Income from discontinued operations	'		4,530		'		9,663
Loss from early extinguishment of debt	'		-703		'		-703
Realized gains and unrealized losses on disposition of rental property, net	'		13,758		'		13,758
Total discontinued operations	'		17,585		'		22,718
Net income	57,347		26,184		39,719		39,273
Noncontrolling interest in consolidated joint ventures	290		62		612		124
Noncontrolling interest in Operating Partnership	-6,514		-1,048		-4,506		-2,021
Noncontrolling interest in discontinued operations	'		-2,127		'		-2,749
Net income available to common shareholders	$51,123		$23,071		$35,825		$34,627
[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.