Mack Cali Realty L P 10-Q 25 Oct 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 21, 2016
Entity Registrant Name	MACK CALI REALTY CORP
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Entity Central Index Key	924,901
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Entity Common Stock, Shares Outstanding		89,688,470
Mack Cali Realty LP [Member]
Entity Registrant Name	Mack Cali Realty LP
Entity Central Index Key	1,067,063
Entity Filer Category	Large Accelerated Filer

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Rental property
Land and leasehold interests	$ 667,095	$ 735,696
Buildings and improvements	3,821,332	3,648,238
Tenant improvements	361,301	408,617
Furniture, fixtures and equipment	19,622	15,167
Gross investment in rental property	4,869,350	4,807,718
Less - accumulated depreciation and amortization	(1,351,825)	(1,464,482)
Total investment in rental property	3,517,525	3,343,236
Rental property held for sale, net	102,798
Net investment in rental property	3,620,323	3,343,236
Cash and cash equivalents	21,555	37,077
Investments in unconsolidated joint ventures	319,807	303,457
Unbilled rents receivable, net	105,547	120,246
Deferred charges, goodwill and other assets, net	303,654	203,850
Restricted cash	54,784	35,343
Accounts receivable, net of allowance for doubtful accounts of $1,308 and $1,407	9,949	10,754
Total assets	4,435,619	4,053,963
LIABILITIES AND EQUITY
Senior unsecured notes, net	951,275	1,263,782
Unsecured term loan, net	347,830
Revolving credit facility	95,000	155,000
Mortgages, loans payable and other obligations, net	1,061,204	726,611
Dividends and distributions payable	15,233	15,582
Accounts payable, accrued expenses and other liabilities	185,326	135,057
Rents received in advance and security deposits	48,314	49,739
Accrued interest payable	17,613	24,484
Total liabilities	2,721,795	2,370,255
Commitments and contingencies
Mack-Cali Realty stockholders' equity:
Common stock, $0.01 par value, 190,000,000 shares authorized, 89,647,337 and 89,583,950 shares outstanding	897	896
Additional paid-in capital	2,574,999	2,570,392
Dividends in excess of net earnings	(1,053,910)	(1,115,612)
Accumulated other comprehensive loss	(6,739)
Total Mack-Cali Realty Corporation stockholders' equity	1,515,247	1,455,676
Noncontrolling interests in subsidiaries:
Operating Partnership	177,440	170,891
Consolidated joint ventures	21,137	57,141
Total noncontrolling interests in subsidiaries	198,577	228,032
Total equity	1,713,824	1,683,708
Total liabilities and equity	4,435,619	4,053,963
Mack Cali Realty LP [Member]
Rental property
Land and leasehold interests	667,095	735,696
Buildings and improvements	3,821,332	3,648,238
Tenant improvements	361,301	408,617
Furniture, fixtures and equipment	19,622	15,167
Gross investment in rental property	4,869,350	4,807,718
Less - accumulated depreciation and amortization	(1,351,825)	(1,464,482)
Total investment in rental property	3,517,525	3,343,236
Rental property held for sale, net	102,798
Net investment in rental property	3,620,323	3,343,236
Cash and cash equivalents	21,555	37,077
Investments in unconsolidated joint ventures	319,807	303,457
Unbilled rents receivable, net	105,547	120,246
Deferred charges, goodwill and other assets, net	303,654	203,850
Restricted cash	54,784	35,343
Accounts receivable, net of allowance for doubtful accounts of $1,308 and $1,407	9,949	10,754
Total assets	4,435,619	4,053,963
LIABILITIES AND EQUITY
Senior unsecured notes, net	951,275	1,263,782
Unsecured term loan, net	347,830
Revolving credit facility	95,000	155,000
Mortgages, loans payable and other obligations, net	1,061,204	726,611
Dividends and distributions payable	15,233	15,582
Accounts payable, accrued expenses and other liabilities	185,326	135,057
Rents received in advance and security deposits	48,314	49,739
Accrued interest payable	17,613	24,484
Total liabilities	2,721,795	2,370,255
Commitments and contingencies
Mack-Cali Realty stockholders' equity:
General Partner, 89,647,337 and 89,583,950 common units outstanding	1,464,864	1,399,419
Limited partners, 10,497,946 and 10,516,844 common units outstanding	234,562	227,148
Accumulated other comprehensive loss	(6,739)
Total Mack-Cali Realty, L.P. partners' capital	1,692,687	1,626,567
Noncontrolling interests in subsidiaries:
Noncontrolling interests in consolidated joint ventures	21,137	57,141
Total equity	1,713,824	1,683,708
Total liabilities and equity	$ 4,435,619	$ 4,053,963

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Allowance for doubtful accounts receivable	$ 1,308	$ 1,407
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	190,000,000	190,000,000
Common stock, shares outstanding	89,647,337	89,583,950
Mack Cali Realty LP [Member]
Allowance for doubtful accounts receivable	$ 1,308	$ 1,407
General partner common units outstanding	89,647,337	89,583,950
Limited partner common units outstanding	10,497,946	10,516,844

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
REVENUES
Base rents	$ 129,523	$ 119,707	$ 380,133	$ 364,746
Escalations and recoveries from tenants	16,177	15,050	45,248	49,291
Real estate services	6,650	7,510	19,931	22,555
Parking income	3,443	2,749	10,131	8,141
Other income	1,724	1,142	4,224	3,707
Total revenues	157,517	146,158	459,667	448,440
EXPENSES
Real estate taxes	20,606	19,143	66,250	63,005
Utilities	14,127	13,172	38,658	44,146
Operating services	25,553	24,535	76,309	78,607
Real estate services expenses	6,361	6,673	19,418	19,520
General and administrative	14,007	13,670	39,011	36,558
Acquisition-related costs	815		2,854	111
Depreciation and amortization	48,117	44,099	134,639	127,266
Impairments		164,176		164,176
Total expenses	129,586	285,468	377,139	533,389
Operating income (loss)	27,931	(139,310)	82,528	(84,949)
OTHER (EXPENSE) INCOME
Interest expense	(24,233)	(24,689)	(72,158)	(78,677)
Interest and other investment income (loss)	1,262	5	739	563
Equity in earnings (loss) of unconsolidated joint ventures	21,790	3,135	19,622	(2,723)
Gain on change of control of interests			15,347
Realized gains (losses) and unrealized losses on disposition of rental property, net	(17,053)	18,718	68,664	53,261
Gain on sale of investment in unconsolidated joint venture			5,670	6,448
Loss from extinguishment of debt, net	(19,302)		(6,882)
Total other income (expense)	(37,536)	(2,831)	31,002	(21,128)
Net income (loss)	(9,605)	(142,141)	113,530	(106,077)
Noncontrolling interest in consolidated joint ventures	65	(281)	460	582
Noncontrolling interest in Operating Partnership	999	15,530	(11,947)	11,461
Net income (loss) available to common shareholders	$ (8,541)	$ (126,892)	$ 102,043	$ (94,034)
Basic earnings per common share:
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.14	$ (1.05)
Diluted earnings per common share:
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.13	$ (1.05)
Basic weighted average shares outstanding	89,755	89,249	89,739	89,229
Diluted weighted average shares outstanding	100,253	100,172	100,486	100,236
Mack Cali Realty LP [Member]
REVENUES
Base rents	$ 129,523	$ 119,707	$ 380,133	$ 364,746
Escalations and recoveries from tenants	16,177	15,050	45,248	49,291
Real estate services	6,650	7,510	19,931	22,555
Parking income	3,443	2,749	10,131	8,141
Other income	1,724	1,142	4,224	3,707
Total revenues	157,517	146,158	459,667	448,440
EXPENSES
Real estate taxes	20,606	19,143	66,250	63,005
Utilities	14,127	13,172	38,658	44,146
Operating services	25,553	24,535	76,309	78,607
Real estate services expenses	6,361	6,673	19,418	19,520
General and administrative	14,007	13,670	39,011	36,558
Acquisition-related costs	815		2,854	111
Depreciation and amortization	48,117	44,099	134,639	127,266
Impairments		164,176		164,176
Total expenses	129,586	285,468	377,139	533,389
Operating income (loss)	27,931	(139,310)	82,528	(84,949)
OTHER (EXPENSE) INCOME
Interest expense	(24,233)	(24,689)	(72,158)	(78,677)
Interest and other investment income (loss)	1,262	5	739	563
Equity in earnings (loss) of unconsolidated joint ventures	21,790	3,135	19,622	(2,723)
Gain on change of control of interests			15,347
Realized gains (losses) and unrealized losses on disposition of rental property, net	(17,053)	18,718	68,664	53,261
Gain on sale of investment in unconsolidated joint venture			5,670	6,448
Loss from extinguishment of debt, net	(19,302)		(6,882)
Total other income (expense)	(37,536)	(2,831)	31,002	(21,128)
Net income (loss)	(9,605)	(142,141)	113,530	(106,077)
Noncontrolling interest in consolidated joint ventures	65	(281)	460	582
Net income (loss) available to common shareholders	$ (9,540)	$ (142,422)	$ 113,990	$ (105,495)
Basic earnings per common share:
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.14	$ (1.05)
Diluted earnings per common share:
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.13	$ (1.05)
Basic weighted average units outstanding	100,253	100,172	100,241	100,236
Diluted weighted average units outstanding	100,253	100,172	100,486	100,236

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (loss)	$ (9,605)	$ (142,141)	$ 113,530	$ (106,077)
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments for interest rate swaps	1,725		(7,528)
Comprehensive income (loss)	(7,880)	(142,141)	106,002	(106,077)
Comprehensive (income) loss attributable to noncontrolling interest in consolidated joint ventures	65	(281)	460	582
Comprehensive (income) loss attributable to noncontrolling interest in Operating Partnership	818	15,530	(11,158)	11,461
Comprehensive income (loss) attributable to common shareholders	(6,997)	(126,892)	95,304	(94,034)
Mack Cali Realty LP [Member]
Net income (loss)	(9,605)	(142,141)	113,530	(106,077)
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments for interest rate swaps	1,725		(7,528)
Comprehensive income (loss)	(7,880)	(142,141)	106,002	(106,077)
Comprehensive (income) loss attributable to noncontrolling interest in consolidated joint ventures	65	(281)	460	582
Comprehensive income (loss) attributable to common shareholders	$ (7,815)	$ (142,422)	$ 106,462	$ (105,495)

Consolidated Statement Of Chang

Consolidated Statement Of Changes In Equity - 9 months ended Sep. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Mack Cali Realty LP [Member]General Partner Common Units [Member]	Mack Cali Realty LP [Member]Limited Partner Common Units [Member]	Mack Cali Realty LP [Member]General Partner Common Unitholders [Member]	Mack Cali Realty LP [Member]Limited Partners Common Unitholders [Member]	Mack Cali Realty LP [Member]Accumulated Other Comprehensive Income (Loss) [Member]	Mack Cali Realty LP [Member]Noncontrolling Interests In Subsidiaries [Member]	Mack Cali Realty LP [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Dividends In Excess Of Net Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests In Subsidiaries [Member]	Total
Balance, value at Dec. 31, 2015								$ 896	$ 2,570,392	$ (1,115,612)		$ 228,032	$ 1,683,708
Balance, shares at Dec. 31, 2015		10,517						89,584
Net income			$ 102,043	$ 11,947		$ (460)	$ 113,530			102,043		11,487	113,530
Balance, value at Dec. 31, 2015			1,399,419	227,148		57,141	1,683,708
Balance, units at Dec. 31, 2015	89,584
Common stock dividends										(40,341)			(40,341)
Unit distributions			(40,341)	(4,947)			(45,288)					(4,947)	(4,947)
Acquisition/increase in noncontrolling interest in consolidated joint ventures			414			(35,544)	(35,130)		414			(35,544)	(35,130)
Redemption of common units for common stock, value			308	(308)					308			(308)
Redemption of common units for common stock, shares	19	(19)						19
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value			23				23		23				23
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares	1							1
Directors' deferred compensation plan, value			$ 285				$ 285		$ 285				$ 285
Directors' deferred compensation plan, shares
Stock compensation, value			2,788	1,511			4,299	1	2,787			1,511	4,299
Stock compensation, shares	$ 47							$ 47
Cancellation of restricted stock, value			$ (75)				$ (75)		$ (75)				$ (75)
Cancellation of restricted stock, shares	(4)							(4)
Other comprehensive income (loss)				(789)	(6,739)		(7,528)				(6,739)	(789)	(7,528)
Rebalancing of ownership percentage between parent and subsidiaries									865			(865)
Balance, value at Sep. 30, 2016								$ 897	$ 2,574,999	$ (1,053,910)	$ (6,739)	$ 198,577	$ 1,713,824
Balance, shares at Sep. 30, 2016		10,498						89,647
Balance, value at Sep. 30, 2016			$ 1,464,864	$ 234,562	$ (6,739)	$ 21,137	$ 1,713,824
Balance, units at Sep. 30, 2016	89,647

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 113,530	$ (106,077)
Adjustments to reconcile net income to net cash provided by Operating activities:
Depreciation and amortization, including related intangible assets	134,756	128,422
Amortization of directors deferred compensation stock units	285	297
Amortization of stock compensation	4,299	1,500
Amortization of deferred financing costs	3,583	2,846
Amortization of debt discount and mark-to-market	1,417	2,791
Equity in (earnings) loss of unconsolidated joint ventures	(19,622)	2,723
Distributions of cumulative earnings from unconsolidated joint ventures	4,833	3,145
Gain on change of control of interests	(15,347)
Realized (gains) losses and unrealized losses on disposition of rental property, net	(68,664)	(53,261)
Gain on sale of investments in unconsolidated joint ventures	(5,670)	(6,448)
Gain from extinguishment of debt	(12,420)
Impairments		164,176
Changes in operating assets and liabilities:
(Increase) decrease in unbilled rents receivable, net	(9,860)	17
Increase in deferred charges, goodwill and other assets	(11,173)	(23,387)
Decrease (increase) in accounts receivable, net	424	(603)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	(12,656)	5,298
Decrease in rents received in advance and security deposits	(1,425)	(4,502)
(Decrease) increase in accrued interest payable	(1,500)	7,751
Net cash provided by operating activities	104,790	124,688
CASH FLOWS FROM INVESTING ACTIVITIES
Rental property acquisitions and related intangibles	(405,808)	(6,057)
Rental property additions and improvements	(94,017)	(59,700)
Development of rental property and other related costs	(150,592)	(49,959)
Proceeds from the sales of rental property	409,101	81,049
Proceeds from the sale of investments in unconsolidated joint ventures	6,420	6,448
Repayment of notes receivable	375	7,750
Acquisition of noncontrolling interests	(37,946)
Investment in unconsolidated joint ventures	(31,318)	(68,468)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	20,906	4,329
Increase in restricted cash	(287)	(5,823)
Net cash used in investing activities	(283,166)	(90,431)
CASH FLOW FROM FINANCING ACTIVITIES
Borrowings from revolving credit facility	793,000	179,000
Repayment of revolving credit facility	(853,000)	(144,000)
Repayment of senior unsecured notes	(314,755)
Borrowings from unsecured term loan	350,000
Proceeds from mortgages and loans payable	426,613	6,193
Repayment of mortgages, loans payable and other obligations	(187,969)	(29,307)
Payment of financing costs	(7,050)	(98)
Contributions from noncontrolling interests	1,065	251
Payment of dividends and distributions	(45,050)	(44,979)
Net cash by (used in) financing activities	162,854	(32,940)
Net (decrease) increase in cash and cash equivalents	(15,522)	1,317
Cash and cash equivalents, beginning of period	37,077	29,549
Cash and cash equivalents, end of period	21,555	30,866
Mack Cali Realty LP [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	113,530	(106,077)
Adjustments to reconcile net income to net cash provided by Operating activities:
Depreciation and amortization, including related intangible assets	134,756	128,422
Amortization of directors deferred compensation stock units	285	297
Amortization of stock compensation	4,299	1,500
Amortization of deferred financing costs	3,583	2,846
Amortization of debt discount and mark-to-market	1,417	2,791
Equity in (earnings) loss of unconsolidated joint ventures	(19,622)	2,723
Distributions of cumulative earnings from unconsolidated joint ventures	4,833	3,145
Gain on change of control of interests	(15,347)
Realized (gains) losses and unrealized losses on disposition of rental property, net	(68,664)	(53,261)
Gain on sale of investments in unconsolidated joint ventures	(5,670)	(6,448)
Gain from extinguishment of debt	(12,420)
Impairments		164,176
Changes in operating assets and liabilities:
(Increase) decrease in unbilled rents receivable, net	(9,860)	17
Increase in deferred charges, goodwill and other assets	(11,173)	(23,387)
Decrease (increase) in accounts receivable, net	424	(603)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	(12,656)	5,298
Decrease in rents received in advance and security deposits	(1,425)	(4,502)
(Decrease) increase in accrued interest payable	(1,500)	7,751
Net cash provided by operating activities	104,790	124,688
CASH FLOWS FROM INVESTING ACTIVITIES
Rental property acquisitions and related intangibles	(405,808)	(6,057)
Rental property additions and improvements	(94,017)	(59,700)
Development of rental property and other related costs	(150,592)	(49,959)
Proceeds from the sales of rental property	409,101	81,049
Proceeds from the sale of investments in unconsolidated joint ventures	6,420	6,448
Repayment of notes receivable	375	7,750
Acquisition of noncontrolling interests	(37,946)
Investment in unconsolidated joint ventures	(31,318)	(68,468)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	20,906	4,329
Increase in restricted cash	(287)	(5,823)
Net cash used in investing activities	(283,166)	(90,431)
CASH FLOW FROM FINANCING ACTIVITIES
Borrowings from revolving credit facility	793,000	179,000
Repayment of revolving credit facility	(853,000)	(144,000)
Repayment of senior unsecured notes	(314,755)
Borrowings from unsecured term loan	350,000
Proceeds from mortgages and loans payable	426,613	6,193
Repayment of mortgages, loans payable and other obligations	(187,969)	(29,307)
Payment of financing costs	(7,050)	(98)
Contributions from noncontrolling interests	1,065	251
Payment of dividends and distributions	(45,050)	(44,979)
Net cash by (used in) financing activities	162,854	(32,940)
Net (decrease) increase in cash and cash equivalents	(15,522)	1,317
Cash and cash equivalents, beginning of period	37,077	29,549
Cash and cash equivalents, end of period	$ 21,555	$ 30,866

Organization And Basis Of Prese

Organization And Basis Of Presentation	9 Months Ended
	Sep. 30, 2016
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 “General Partner” ) is a fully-integrated self-administered, self-managed real estate investment trust (“REIT”). The General Partner controls Mack-Cali Realty, L.P., a Delaware limited partnership, together with its subsidiaries (collectively, the “Operating Partnership”), as its sole general partner and owned an 89.5 percent common unit interest in the Operating Partnership as of both September 30, 2016 and December 31, 2015. The General Partner’s business is the ownership of interests in and operation of the Operating Partnership and all of the General Partner’s expenses are incurred for the benefit of the Operating Partnership. The General Partner is reimbursed by the Operating Partnership for all expenses it incurs relating to the ownership and operation of the Operating Partnership.  The Operating Partnership conducts the business of providing leasing, management, acquisition, development, construction and tenant-related services for its General Partner. The Operating Partnership, through its operating divisions and subsidiaries, including the Mack-Cali property-owning partnerships and limited liability companies , is the entity through which all of the General Partner’s operations are conducted. Unless stated otherwise or the context requires, the “Company” refers to the General Partner and its subsidiaries, including the Operating Partnership and its subsidiaries.  As of September 30, 2016 , the Company owned or had interests in 263 properties, consisting of 136 office and 110 flex properties, totaling approximately 29.0 million square feet, leased to approximately 1,800 commercial tenants, and 17 multi-family rental properties containing 5,214 residential units, plus developable land (collectively, the “Properties”). The Properties are comprised of 136 office buildings totaling approximately 23.7 million square feet (which include 36 buildings, aggregating approximately 5.6 million square feet owned by unconsolidated joint ventures in which the Company has investment interests), 94 office/flex buildings totaling approximately 4.8 million square feet, six industrial/warehouse buildings totaling approximately 387,400 square feet, 17 multi-family properties totaling 5,214 apartments (which include ten properties aggregating 3,587 apartments owned by unconsolidated joint ventures in which the Company has investment interests), six parking/retail properties totaling approximately 130,100 square feet (which include two buildings aggregating 81,700 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 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 (i) the ability to make decisions about the entity's activities through voting or similar rights, (ii) the obligation to absorb the expected losses of the entity, or (iii) the right to receive the expected residual returns of the entity; (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 substantially all of 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.  On January 1, 2016, the Company adopted accounting guidance under ASC 810, Consolidation, modifying the analysis it must perform to determine whether it should consolidate certain types of legal entities. The guidance does not amend the existing disclosure requirements for variable interest entities or voting interest model entities. The guidance, however, modified the requirements to qualify under the voting interest model. Under the revised guidance, the Operating Partnership will be a variable interest entity of the parent company, Mack-Cali Realty Corporation. As the Operating Partnership is already consolidated in the balance sheets of Mack-Cali Realty Corporation, the identification of this entity as a variable interest entity has no impact on the consolidated financial statements of Mack-Cali Realty Corporation. There were no other legal entities qualifying under the scope of the revised guidance that were consolidated as a result of the adoption.  As of September 30, 2016 and December 31, 2015 , the Company’s investments in consolidated real estate joint ventures , which are variable interest entities in which the Company is deemed to be the primary beneficiary have total real estate assets of $193.1 million and $273.4 million, respectively, mortgages of $70.1 million and $89.5 million, respectively, and other liabilities of $20.7 million and $17.5 million, respectively.  The financial statements have been prepared in conformity with GAAP. 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. These estimates and assumptions are based on management’s historical experience that are believed to be reasonable at the time. However, because future events and their effects cannot be determined with certainty, the determination of estimates requires the exercise of judgment.  Actual results could differ from those estimates. Certain reclassifications have been made to prior period amounts in order to conform with current period presentation.
Mack Cali Realty LP [Member]
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 “General Partner” ) is a fully-integrated self-administered, self-managed real estate investment trust (“REIT”). The General Partner controls Mack-Cali Realty, L.P., a Delaware limited partnership, together with its subsidiaries (collectively, the “Operating Partnership”), as its sole general partner and owned an 89.5 percent common unit interest in the Operating Partnership as of both September 30, 2016 and December 31, 2015. The General Partner’s business is the ownership of interests in and operation of the Operating Partnership and all of the General Partner’s expenses are incurred for the benefit of the Operating Partnership. The General Partner is reimbursed by the Operating Partnership for all expenses it incurs relating to the ownership and operation of the Operating Partnership.  The Operating Partnership conducts the business of providing leasing, management, acquisition, development, construction and tenant-related services for its General Partner. The Operating Partnership, through its operating divisions and subsidiaries, including the Mack-Cali property-owning partnerships and limited liability companies , is the entity through which all of the General Partner’s operations are conducted. Unless stated otherwise or the context requires, the “Company” refers to the General Partner and its subsidiaries, including the Operating Partnership and its subsidiaries.  As of September 30, 2016 , the Company owned or had interests in 263 properties, consisting of 136 office and 110 flex properties, totaling approximately 29.0 million square feet, leased to approximately 1,800 commercial tenants, and 17 multi-family rental properties containing 5,214 residential units, plus developable land (collectively, the “Properties”). The Properties are comprised of 136 office buildings totaling approximately 23.7 million square feet (which include 36 buildings, aggregating approximately 5.6 million square feet owned by unconsolidated joint ventures in which the Company has investment interests), 94 office/flex buildings totaling approximately 4.8 million square feet, six industrial/warehouse buildings totaling approximately 387,400 square feet, 17 multi-family properties totaling 5,214 apartments (which include ten properties aggregating 3,587 apartments owned by unconsolidated joint ventures in which the Company has investment interests), six parking/retail properties totaling approximately 130,100 square feet (which include two buildings aggregating 81,700 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 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 (i) the ability to make decisions about the entity's activities through voting or similar rights, (ii) the obligation to absorb the expected losses of the entity, or (iii) the right to receive the expected residual returns of the entity; (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 substantially all of 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.  On January 1, 2016, the Company adopted accounting guidance under ASC 810, Consolidation, modifying the analysis it must perform to determine whether it should consolidate certain types of legal entities. The guidance does not amend the existing disclosure requirements for variable interest entities or voting interest model entities. The guidance, however, modified the requirements to qualify under the voting interest model. Under the revised guidance, the Operating Partnership will be a variable interest entity of the parent company, Mack-Cali Realty Corporation. As the Operating Partnership is already consolidated in the balance sheets of Mack-Cali Realty Corporation, the identification of this entity as a variable interest entity has no impact on the consolidated financial statements of Mack-Cali Realty Corporation. There were no other legal entities qualifying under the scope of the revised guidance that were consolidated as a result of the adoption.  As of September 30, 2016 and December 31, 2015 , the Company’s investments in consolidated real estate joint ventures , which are variable interest entities in which the Company is deemed to be the primary beneficiary have total real estate assets of $193.1 million and $273.4 million, respectively, mortgages of $70.1 million and $89.5 million, respectively, and other liabilities of $20.7 million and $17.5 million, respectively.  The financial statements have been prepared in conformity with GAAP. 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. These estimates and assumptions are based on management’s historical experience that are believed to be reasonable at the time. However, because future events and their effects cannot be determined with certainty, the determination of estimates requires the exercise of judgment.  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 Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Significant Accounting Policies	2. SIGNIFICANT ACCOUNTING POLICIES  Rental Property Rental 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 $ 0.7 million and $ 0.9 million for the three months ended September 30, 2016 and 2015 , respectively, and $1.9 million and $3.5 million for the nine months ended September 30, 2016 and 2015 , respectively. Included in total rental property is construction, tenant improvement and development in-progress of $ 301 million and $ 88.7 million as of September 30, 2016 and December 31, 2015 , 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 differ from 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, 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 value 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. The Company generally considers assets to be held for sale when the transaction has received appropriate corporate authority, and there are no significant contingencies relating to the sale. If, in management’s opinion, the estimated net sales price, net of selling costs, of the assets which have been identified as held for sale is less than the carrying 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 value 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 The 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.  If the venture subsequently makes distributions and the Company does not have an implied or actual commitment to support the operations of the venture, including a general partner interest in the investee, the Company will not record a basis less than zero, rather such amounts will be recorded as equity in earnings of unconsolidated joint ventures. 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 value 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 All highly liquid investments with an original maturity of three months or less when purchased are considered to be cash equivalents. Deferred Financing Costs Costs incurred in obtaining financing are capitalized and amortized over the term of the related indebtedness. Deferred financing costs are presented in the balance sheet as a direct deduction from the carrying value of the debt liability to which they relate, except deferred financing costs related to the revolving credit facility, which are presented in deferred charges, goodwill and other assets. In all cases, amortization of such costs is included in interest expense and was $ 1,234,000 and $ 945,000 for the three months ended September 30, 2016 and 2015 , respectively, and $3,583,000 and $2,846,000 for the nine months ended September 30, 2016 and 2015 , respectively. If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (losses) from extinguishment of debt. Included in lo ss from extinguishment of debt , net of gains, of $19.3 million and $6.9 million for the three and nine months ended September 30, 2016, respectively, were unamortized deferred financing costs which were written off of $346,000 for both the three and nine months ended September 30, 2016 . Deferred Leasing Costs Costs 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, and included in deferred charges, goodwill and other assets, net, was approximately $ 790,000 and $ 922,000 for the three months ended September 30, 2016 and 2015 , respectively, and $2,440,000 and $2,738,000 for the nine months ended September 30, 2016 and 2015 , respectively. Goodwill Goodwill 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 value 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 value. If, based on this assessment, management determines that the fair value of the reporting unit is not less than its carrying value, then performing the additional two-step impairment test is unnecessary. If the carrying value of goodwill exceeds its fair value, an impairment charge is recognized. Derivative Instruments The 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 Base 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.  Real estate services revenue includes property management, development, construction 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. Allowance for Doubtful Accounts Management 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 The General Partner 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 General Partner 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 General Partner 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 General Partner retains and does not distribute any net capital gains, the General Partner will be required to pay federal, state and local taxes , as applicable, on such net capital gains at the rate applicable to capital gains of a corporation.  The Operating Partnership is a partnership, and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective tax returns. Accordingly, no provision or benefit for income taxes has been made in the accompanying financial statements.  T he 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 September 30, 2016 , the Company had a deferred tax asset related to its TRS activity with a balance of approximately $ 21.8 million which has been fully reserved for through a valuation allowance. If the General Partner fails to qualify as a REIT in any taxable year, the General Partner will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates. The General Partner is subject to certain state and local taxes.  Pursuant to the amended provisions related to uncertain tax provisions of ASC 740, Income Taxes, the Company recognized no material adjustments regarding its tax accounting treatment. The Company expects to recognize interest and penalties related to uncertain tax positions, if any, as income tax expense, which is included in general and administrative expense.  In the normal course of business, the Company or one of its subsidiaries is subject to examination by federal, state and local jurisdictions in which it operates, where applicable. As of September 30, 2016 , the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2011 forward. Earnings Per Share or Unit The Company presents both basic and diluted earnings per share or unit (“EPS or EPU ”). Basic EPS or EPU excludes dilution and is computed by dividing net income available to common shareholders or unitholders by the weighted average number of shares or units outstanding for the period. Diluted EPS or EPU 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 or EPU from continuing operations amount. Shares or Units whose issuance is contingent upon the satisfaction of certain conditions shall be considered outstanding and included in the computation of diluted EPS or EPU as follows (i) if all necessary conditions have been satisfied by the end of the period (the events have occurred), those shares or units 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 or units included in diluted EPS or EPU shall be based on the number of shares or units , 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 or units 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 or units shall be included in the denominator of diluted EPS or EPU as of the beginning of the period (or as of the date of the grant, if later).  Dividends and Distributions Payable The dividends and distributions payable at September 30, 2016 represents dividends payable to common shareholders ( 89,647,443 shares) and distributions payable to noncontrolling interest unitholders of the Operating Partnership ( 10,497,946 common units and 657,373 LTIP units) for all such holders of record as of October 5, 2016 with respect to the third quarter 2016 . The third quarter 2016 common stock dividends and unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on September 27, 2016 and paid on October 14, 2016 .  The dividends and distributions payable at December 31, 2015 represents dividends payable to common shareholders ( 89,584,008 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership ( 10,516,844 common units) for all such holders of record as of January 6, 2016 with respect to the fourth quarter 2015 . The fourth quarter 2015 common stock dividends and common unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on December 8, 2015 and paid on January 15, 2016 .  Costs Incurred For Stock Issuances Costs incurred in connection with the Company’s stock issuances are reflected as a reduction of additional paid ‑in capital.  Stock Compensation The 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”), restricted stock units (“RSUs”), performance share units (“PSUs”), long-term incentive plan awards and stock options at the grant date be amortized ratably into expense over the appropriate vesting period. The Company recorded stock compensation expense of $ 2,046,000 and $ 695,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 4,299,000 and $1,500,000 for the nine months ended September 30, 2016 and 2015 , respectively.  Other Comprehensive Income (Loss) Other comprehensive income (loss) includes items that are recorded in equity, such as effective portions of derivatives designated as cash flow hedges or unrealized holding gains or losses on marketable securities available for sale.  Fair Value Hierarchy The 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 in active 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 In April 2014, the Financial Accounting Standards Board (“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 is effective for all companies 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. The Company adopted 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.  Impact Of Recently-Issued Accounting Standards In May 2014, the 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, 2017, and early adoption is permitted for periods beginning after December 15, 2016. 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.  In August 2014, the FASB issued ASU 2014-15, which requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, and to provide certain disclosures when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. ASU 2014-15 is effective for the annual period ended December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The adoption of ASU 2014-15 is not expected to materially impact the Company’s consolidated financial statements or disclosures.  In February 2016, the FASB issued ASU 2016-02, modifying the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in the same manner as operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The guidance is expected to impact the consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee. The guidance supersedes previously issued guidance under ASC Topic 840 “Leases.” The guidance is effective on January 1, 2019, with early adoption permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s consolidated financial statements.  In March 2016, the FASB issued ASU 2016-07, which eliminates a requirement for the retroactive adjustment on a step by step basis of the investment, results of operations, and retained earnings as if the equity method had been effective during all previous periods that the investment had been held when an investment qualifies for equity method accounting due to an increase in the level of ownership or degree of influence. The cost of acquiring the additional interest in the investee is to be added to the current basis of the in
Mack Cali Realty LP [Member]
Significant Accounting Policies	2. SIGNIFICANT ACCOUNTING POLICIES  Rental Property Rental 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 $ 0.7 million and $ 0.9 million for the three months ended September 30, 2016 and 2015 , respectively, and $1.9 million and $3.5 million for the nine months ended September 30, 2016 and 2015 , respectively. Included in total rental property is construction, tenant improvement and development in-progress of $ 301 million and $ 88.7 million as of September 30, 2016 and December 31, 2015 , 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 differ from 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, 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 value 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. The Company generally considers assets to be held for sale when the transaction has received appropriate corporate authority, and there are no significant contingencies relating to the sale. If, in management’s opinion, the estimated net sales price, net of selling costs, of the assets which have been identified as held for sale is less than the carrying 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 value 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 The 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.  If the venture subsequently makes distributions and the Company does not have an implied or actual commitment to support the operations of the venture, including a general partner interest in the investee, the Company will not record a basis less than zero, rather such amounts will be recorded as equity in earnings of unconsolidated joint ventures. 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 value 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 All highly liquid investments with an original maturity of three months or less when purchased are considered to be cash equivalents. Deferred Financing Costs Costs incurred in obtaining financing are capitalized and amortized over the term of the related indebtedness. Deferred financing costs are presented in the balance sheet as a direct deduction from the carrying value of the debt liability to which they relate, except deferred financing costs related to the revolving credit facility, which are presented in deferred charges, goodwill and other assets. In all cases, amortization of such costs is included in interest expense and was $ 1,234,000 and $ 945,000 for the three months ended September 30, 2016 and 2015 , respectively, and $3,583,000 and $2,846,000 for the nine months ended September 30, 2016 and 2015 , respectively. If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (losses) from extinguishment of debt. Included in lo ss from extinguishment of debt , net of gains, of $19.3 million and $6.9 million for the three and nine months ended September 30, 2016, respectively, were unamortized deferred financing costs which were written off of $346,000 for both the three and nine months ended September 30, 2016 . Deferred Leasing Costs Costs 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, and included in deferred charges, goodwill and other assets, net, was approximately $ 790,000 and $ 922,000 for the three months ended September 30, 2016 and 2015 , respectively, and $2,440,000 and $2,738,000 for the nine months ended September 30, 2016 and 2015 , respectively. Goodwill Goodwill 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 value 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 value. If, based on this assessment, management determines that the fair value of the reporting unit is not less than its carrying value, then performing the additional two-step impairment test is unnecessary. If the carrying value of goodwill exceeds its fair value, an impairment charge is recognized. Derivative Instruments The 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 Base 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.  Real estate services revenue includes property management, development, construction 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. Allowance for Doubtful Accounts Management 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 The General Partner 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 General Partner 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 General Partner 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 General Partner retains and does not distribute any net capital gains, the General Partner will be required to pay federal, state and local taxes , as applicable, on such net capital gains at the rate applicable to capital gains of a corporation.  The Operating Partnership is a partnership, and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective tax returns. Accordingly, no provision or benefit for income taxes has been made in the accompanying financial statements.  T he 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 September 30, 2016 , the Company had a deferred tax asset related to its TRS activity with a balance of approximately $ 21.8 million which has been fully reserved for through a valuation allowance. If the General Partner fails to qualify as a REIT in any taxable year, the General Partner will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates. The General Partner is subject to certain state and local taxes.  Pursuant to the amended provisions related to uncertain tax provisions of ASC 740, Income Taxes, the Company recognized no material adjustments regarding its tax accounting treatment. The Company expects to recognize interest and penalties related to uncertain tax positions, if any, as income tax expense, which is included in general and administrative expense.  In the normal course of business, the Company or one of its subsidiaries is subject to examination by federal, state and local jurisdictions in which it operates, where applicable. As of September 30, 2016 , the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2011 forward. Earnings Per Share or Unit The Company presents both basic and diluted earnings per share or unit (“EPS or EPU ”). Basic EPS or EPU excludes dilution and is computed by dividing net income available to common shareholders or unitholders by the weighted average number of shares or units outstanding for the period. Diluted EPS or EPU 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 or EPU from continuing operations amount. Shares or Units whose issuance is contingent upon the satisfaction of certain conditions shall be considered outstanding and included in the computation of diluted EPS or EPU as follows (i) if all necessary conditions have been satisfied by the end of the period (the events have occurred), those shares or units 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 or units included in diluted EPS or EPU shall be based on the number of shares or units , 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 or units 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 or units shall be included in the denominator of diluted EPS or EPU as of the beginning of the period (or as of the date of the grant, if later).  Dividends and Distributions Payable The dividends and distributions payable at September 30, 2016 represents dividends payable to common shareholders ( 89,647,443 shares) and distributions payable to noncontrolling interest unitholders of the Operating Partnership ( 10,497,946 common units and 657,373 LTIP units) for all such holders of record as of October 5, 2016 with respect to the third quarter 2016 . The third quarter 2016 common stock dividends and unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on September 27, 2016 and paid on October 14, 2016 .  The dividends and distributions payable at December 31, 2015 represents dividends payable to common shareholders ( 89,584,008 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership ( 10,516,844 common units) for all such holders of record as of January 6, 2016 with respect to the fourth quarter 2015 . The fourth quarter 2015 common stock dividends and common unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on December 8, 2015 and paid on January 15, 2016 .  Costs Incurred For Stock Issuances Costs incurred in connection with the Company’s stock issuances are reflected as a reduction of additional paid ‑in capital.  Stock Compensation The 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”), restricted stock units (“RSUs”), performance share units (“PSUs”), long-term incentive plan awards and stock options at the grant date be amortized ratably into expense over the appropriate vesting period. The Company recorded stock compensation expense of $ 2,046,000 and $ 695,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 4,299,000 and $1,500,000 for the nine months ended September 30, 2016 and 2015 , respectively.  Other Comprehensive Income (Loss) Other comprehensive income (loss) includes items that are recorded in equity, such as effective portions of derivatives designated as cash flow hedges or unrealized holding gains or losses on marketable securities available for sale.  Fair Value Hierarchy The 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 in active 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 In April 2014, the Financial Accounting Standards Board (“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 is effective for all companies 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. The Company adopted 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.  Impact Of Recently-Issued Accounting Standards In May 2014, the 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, 2017, and early adoption is permitted for periods beginning after December 15, 2016. 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.  In August 2014, the FASB issued ASU 2014-15, which requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, and to provide certain disclosures when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. ASU 2014-15 is effective for the annual period ended December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The adoption of ASU 2014-15 is not expected to materially impact the Company’s consolidated financial statements or disclosures.  In February 2016, the FASB issued ASU 2016-02, modifying the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in the same manner as operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The guidance is expected to impact the consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee. The guidance supersedes previously issued guidance under ASC Topic 840 “Leases.” The guidance is effective on January 1, 2019, with early adoption permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s consolidated financial statements.  In March 2016, the FASB issued ASU 2016-07, which eliminates a requirement for the retroactive adjustment on a step by step basis of the investment, results of operations, and retained earnings as if the equity method had been effective during all previous periods that the investment had been held when an investment qualifies for equity method accounting due to an increase in the level of ownership or degree of influence. The cost of acquiring the additional interest in the investee is to be added to the current basis of the in

Recent Transactions

Recent Transactions	9 Months Ended
	Sep. 30, 2016
Recent Transactions	3. RECENT TRANSACTIONS  Acquisitions The Company acquired the following office properties during the nine months ended September 30, 2016 (dollars in thousands) :    Acquisition # of Rentable Acquisition  Date Property Address Location Bldgs. Square Feet Cost  04/04/16 11 Martine Avenue (a) White Plains, New York 1 82,000 $ 10,750  04/07/16 320, 321 University Avenue (b) Newark, New Jersey 2 147,406 23,000  06/02/16 101 Wood Avenue South (c) Edison, New Jersey 1 262,841 82,300  07/01/16 111 River Street (c) Hoboken, New Jersey 1 566,215 210,761   Total Acquisitions 5 1,058,462 $ 326,811   (a) Acquisition represented four units of condominium interests which collectively comprise floors 2 through 5. Upon completion of the acquisition, the Company owns the entire 14-story 262,000 square-foot building. The acquisition was funded using available cash.  (b) This acquisition was funded through borrowings under the Company’s unsecured revolving credit facility.  (c) This acquisition was funded using available cash and through borrowings under the Company’s unsecured revolving credit facility.  The purchase prices were preliminarily allocated to the net assets acquired, as follows (in thousands) :     320,321  11 Martine University 101 Wood 111 River  Avenue Avenue Avenue Street  Land and leasehold interest $ 2,460 $ 7,305 $ 8,509 $ 204  Buildings and improvements 8,290 15,695 72,738 198,609  Above market leases (a) - - 58 617  In-place lease values (a) - - 6,743 43,801  Other assets - - - 11,279  88,048 254,510  Less: Below market lease values (a) - - (5,748) (43,749)  Net assets recorded upon acquisition $ 10,750 $ 23,000 $ 82,300 $ 210,761  ( a ) Above market, in-pla ce and below market lease s will be amortized over a weighted-average term of 8.1 years .  Consolidations On January 5, 2016, the Company, which held a 50 percent subordinated interest in the unconsolidated joint venture, Overlook Ridge Apartment Investors LLC, a 371 -unit multi-family operating property located in Malden, Massachusetts, acquired the remaining interest for $39.8 million in cash plus the assumption of a first mortgage loan secured by the property with a principal balance of $52.7 million. The cash portion of the acquisition was funded primarily through borrowings under the Company’s unsecured revolving credit facility. Upon acquisition, the Company consolidated the asset and accordingly, remeasured its equity interests, as required by the FASB’s consolidation guidance, at fair value (based upon the income approach using current rates and market cap rates and discount rates). As a result, the Company recorded a gain on change of control of interests of $10.2 million in the nine months ended September 30, 2016 . On J anuary 19 , 2016, the Company repaid the assumed loan and obtained a new loan secured by the property in the amount o f $72.5 million, which bears interest at 3.625 percent and matures in February 2023 . See Note 10: Mortgages, Loans Payable and Other Obligations.  During the second quarter 2016 , the Company , which held a 38.25 percent subordinate interest in the unconsolidated Portside Ap artment Developers, L . L . C ., a joint venture which owns a 175 -unit operating multi-family property located in East Boston, Massachusetts , acquired the remaining interests of its joint venture partners for $39.6 million in cash plus the assumption of a mortgage loan secured by the property with a principal balance of $42.5 million . The cash portion of the acquisition was funded primarily through borrowings under the Company’s unsecured revolving credit facility. Upon acquisition, the Company consolidated the asset and accordingly, remeasured its equity interests, as required by the FASB’s consolidation guidance, at fair value (based upon the income approach using current rates and market cap rates and discount rates). As a result, the Company recorded a gain on change of control of interests of $5.2 million in the nine months ended September 30, 2016 . On July 8, 2016, the Company repaid the assumed loan and obtained a new loan secured by the property in the amount of $59 million, which bears interest at 3.44 percent and matures in August 2023. See Note 10: Mortgages, Loans Payable and Other Obligations.  The purchase prices were preliminarily allocated to the net assets acquired upon consolidation, as follows (in thousands) :     Overlook Portside  Ridge Apts  Land and leasehold interest $ 11,072 $ -  Buildings and improvements 87,793 73,713  Furniture, fixtures and equipment 1,695 1,038  Other assets 237 10,181  In-place lease values (a) 4,389 2,637  Less: Below market lease values (a) (489) (242)  Sub Total 104,697 87,327   Less: Debt assumed (52,662) (42,500)   Net assets recorded upon consolidation $ 52,035 $ 44,827  ( a ) In-place lease values and below - market lease values will be amortized over a weighted average term of 7 months .  Other Investments On April 26, 2016, the Company acquired the remaining non-controlling interest in a development project located in Weehawken, NJ for $36.4 million. The project includes developable land for approximately 1,100 multi-family units, 290,000 square feet of office space, a 52.5 percent ownership interest in Port Imperial 4/5 Garage and Retail operating properties. The initial phase, Port Imperial South 11, a 295 -unit multi-family project, began construction in the first quarter 2016.  Dispositions /Rental Property Held for Sale The Company disposed of the following office and multi-family properties during the nine months ended September 30, 2016 (dollars in thousands) :     Realized  Gains  Net Net (losses)/  Disposition # of Sales Book Unrealized  Date Property/Address Location Bldgs. Proceeds Value Losses, net  03/11/16 2 Independence Way (a) Princeton, New Jersey 1 $ 4,119 $ 4,283 $ (164)  03/24/16 1201 Connecticut Avenue, NW Washington, D.C. 1 90,591 31,827 58,764  04/26/16 125 Broad Street (b) New York, New York 1 192,323 200,183 (7,860)  05/09/16 9200 Edmonston Road Greenbelt, Maryland 1 4,083 (c) 3,837 246  05/18/16 1400 L Street Washington, D.C. 1 68,399 (d) 30,053 38,346  07/14/16 600 Parsippany Road Parsippany, New Jersey 1 10,465 (e) 5,875 4,590  07/14/16 4,5,6 Century Drive (f) Parsippany, New Jersey 3 14,533 17,308 (2,775)  08/11/16 Andover Place Andover, Massachusetts 1 39,863 37,150 2,713  09/26/16 222,233 Mount Airy Road (g) Basking Ridge, New Jersey 2 8,817 9,039 (222)  09/27/16 10 Mountainview Road Upper Saddle River, New Jersey 1 18,990 19,571 (581)  Sub-total 13 452,183 359,126 93,057   Unrealized losses on rental property held for sale (24,393)  Totals 13 $ 452,183 $ 359,126 $ 68,664   (a) The Company recorded an impairment charge of $3.2 million on this property during the year ended December 31, 2015.  (b) The Company recorded impairment charges of $83.2 million on this property during the year ended December 31, 2015.  (c) The Company transferred the deed for this property to the lender in satisfaction of its obligations. The Company recorded an impairment charge of $3.0 million on this property during the year ended December 31, 2012.  (d) $28.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (e) $10.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (f) The Company recorded impairment charges of $9.8 million on these properties during the year ended December 31, 2015.  (g) The Company recorded impairment charges of $1 million on these properties during the year ended December 31, 2015.    The following table summarizes income (loss) for the three and nine month periods ended September 30, 2016 and 2015 from the properties disposed of during the nine months ended September 30, 2016 and the six properties disposed of during the year ended December 31, 2015 : (dollars in thousands)    Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Total revenues $ 1,854 $ 12,934 $ 20,048 $ 47,583  Operating and other expenses (1,709) (7,273) (13,374) (25,488)  Depreciation and amortization (2,979) (7,798) (11,590) (20,061)  Interest expense (625) (1,241) (2,011) (6,621)   Income (loss) from properties disposed of $ (3,459) $ (3,378) $ (6,927) $ (4,587)   Impairments - (61,891) - (61,891)  Realized gains/unrealized Losses on dispositions 7,340 18,718 93,057 53,261   Total income (loss) from properties disposed of $ 3,881 $ (46,551) $ 86,130 $ (13,217)  Rental Property Held for Sale, Net During the three months ended September 30, 2016 , the Company signed agreements to sell 14 office properties totaling approximately 1.8 million square feet, subject to certain conditions, and identified them as held for sale as of September 30, 2016. The properties are located in Freehold, New Jersey, Roseland, New Jersey, Greenbelt, Maryland and Lanham, Maryland. The total estimated sales proceeds from the three separate sales are expected to be approximately $113 million. The Company determined that the carrying value of 11 of the office properties were not expected to be recovered from estimated net sales proceeds and accordingly recognized a n unrealized loss allowance of $24.4 million at September 30, 2016 .  The following table summarizes the rental property held for sale, net, as of September 30, 2016 : (dollars in thousands)     September 30,  2016  Land $ 34,802  Buildings and improvements 165,231  Less: Accumulated depreciation (72,842)  Less: Unrealized losses on properties held for sale (24,393)  Rental property held for sale,net $ 102,798  Other assets and liabilities related to the rental properties held for sale, as of September 30, 2016 , include $7.6 million in deferred charges, and other assets, $ 5.6 million in Unbilled rents receivable, $ 2.9 million in Accounts payable, accrued expenses and other liabilities, and $ 2.8 million in Rents received in advance and security deposits. Approximately $ 12.5 million of these assets and $2.8 million of these liabilities are expected to be written off with the completion of the sales.  Unconsolidated Joint Venture Activity O n April 1 , 2016 , the Company bought out its partner PruRose Riverwalk G , L.L.C. for $11.3 million and increased its subordinated interest in Riverwalk G Urban Renewal, L . L . C . from 25 percent to 50 percent using borrowings on the Company’s unsecured credit facility. Riverwalk G Urban Renewal , L.L.C., owns a 316 -unit operating multi-family property located in W est New York , New Jersey.  On May 26, 2016, the Company sold its 50 percent interest in Port Imperial South 15 , L . L . C . (“RiversEdge”) and its 20 percent interest in Port Imperial South 13 Urban Renewal, L.L. C . (“RiverParc”), joint ventures that own the 236 -unit and the 280 -unit multi-family operating properties, respectively, located in Weehawken, New Jersey for $6.4 million . The Company realized a gain on the sale of $5.7 million.
Mack Cali Realty LP [Member]
Recent Transactions	3. RECENT TRANSACTIONS  Acquisitions The Company acquired the following office properties during the nine months ended September 30, 2016 (dollars in thousands) :    Acquisition # of Rentable Acquisition  Date Property Address Location Bldgs. Square Feet Cost  04/04/16 11 Martine Avenue (a) White Plains, New York 1 82,000 $ 10,750  04/07/16 320, 321 University Avenue (b) Newark, New Jersey 2 147,406 23,000  06/02/16 101 Wood Avenue South (c) Edison, New Jersey 1 262,841 82,300  07/01/16 111 River Street (c) Hoboken, New Jersey 1 566,215 210,761   Total Acquisitions 5 1,058,462 $ 326,811   (a) Acquisition represented four units of condominium interests which collectively comprise floors 2 through 5. Upon completion of the acquisition, the Company owns the entire 14-story 262,000 square-foot building. The acquisition was funded using available cash.  (b) This acquisition was funded through borrowings under the Company’s unsecured revolving credit facility.  (c) This acquisition was funded using available cash and through borrowings under the Company’s unsecured revolving credit facility.  The purchase prices were preliminarily allocated to the net assets acquired, as follows (in thousands) :     320,321  11 Martine University 101 Wood 111 River  Avenue Avenue Avenue Street  Land and leasehold interest $ 2,460 $ 7,305 $ 8,509 $ 204  Buildings and improvements 8,290 15,695 72,738 198,609  Above market leases (a) - - 58 617  In-place lease values (a) - - 6,743 43,801  Other assets - - - 11,279  88,048 254,510  Less: Below market lease values (a) - - (5,748) (43,749)  Net assets recorded upon acquisition $ 10,750 $ 23,000 $ 82,300 $ 210,761  ( a ) Above market, in-pla ce and below market lease s will be amortized over a weighted-average term of 8.1 years .  Consolidations On January 5, 2016, the Company, which held a 50 percent subordinated interest in the unconsolidated joint venture, Overlook Ridge Apartment Investors LLC, a 371 -unit multi-family operating property located in Malden, Massachusetts, acquired the remaining interest for $39.8 million in cash plus the assumption of a first mortgage loan secured by the property with a principal balance of $52.7 million. The cash portion of the acquisition was funded primarily through borrowings under the Company’s unsecured revolving credit facility. Upon acquisition, the Company consolidated the asset and accordingly, remeasured its equity interests, as required by the FASB’s consolidation guidance, at fair value (based upon the income approach using current rates and market cap rates and discount rates). As a result, the Company recorded a gain on change of control of interests of $10.2 million in the nine months ended September 30, 2016 . On J anuary 19 , 2016, the Company repaid the assumed loan and obtained a new loan secured by the property in the amount o f $72.5 million, which bears interest at 3.625 percent and matures in February 2023 . See Note 10: Mortgages, Loans Payable and Other Obligations.  During the second quarter 2016 , the Company , which held a 38.25 percent subordinate interest in the unconsolidated Portside Ap artment Developers, L . L . C ., a joint venture which owns a 175 -unit operating multi-family property located in East Boston, Massachusetts , acquired the remaining interests of its joint venture partners for $39.6 million in cash plus the assumption of a mortgage loan secured by the property with a principal balance of $42.5 million . The cash portion of the acquisition was funded primarily through borrowings under the Company’s unsecured revolving credit facility. Upon acquisition, the Company consolidated the asset and accordingly, remeasured its equity interests, as required by the FASB’s consolidation guidance, at fair value (based upon the income approach using current rates and market cap rates and discount rates). As a result, the Company recorded a gain on change of control of interests of $5.2 million in the nine months ended September 30, 2016 . On July 8, 2016, the Company repaid the assumed loan and obtained a new loan secured by the property in the amount of $59 million, which bears interest at 3.44 percent and matures in August 2023. See Note 10: Mortgages, Loans Payable and Other Obligations.  The purchase prices were preliminarily allocated to the net assets acquired upon consolidation, as follows (in thousands) :     Overlook Portside  Ridge Apts  Land and leasehold interest $ 11,072 $ -  Buildings and improvements 87,793 73,713  Furniture, fixtures and equipment 1,695 1,038  Other assets 237 10,181  In-place lease values (a) 4,389 2,637  Less: Below market lease values (a) (489) (242)  Sub Total 104,697 87,327   Less: Debt assumed (52,662) (42,500)   Net assets recorded upon consolidation $ 52,035 $ 44,827  ( a ) In-place lease values and below - market lease values will be amortized over a weighted average term of 7 months .  Other Investments On April 26, 2016, the Company acquired the remaining non-controlling interest in a development project located in Weehawken, NJ for $36.4 million. The project includes developable land for approximately 1,100 multi-family units, 290,000 square feet of office space, a 52.5 percent ownership interest in Port Imperial 4/5 Garage and Retail operating properties. The initial phase, Port Imperial South 11, a 295 -unit multi-family project, began construction in the first quarter 2016.  Dispositions /Rental Property Held for Sale The Company disposed of the following office and multi-family properties during the nine months ended September 30, 2016 (dollars in thousands) :     Realized  Gains  Net Net (losses)/  Disposition # of Sales Book Unrealized  Date Property/Address Location Bldgs. Proceeds Value Losses, net  03/11/16 2 Independence Way (a) Princeton, New Jersey 1 $ 4,119 $ 4,283 $ (164)  03/24/16 1201 Connecticut Avenue, NW Washington, D.C. 1 90,591 31,827 58,764  04/26/16 125 Broad Street (b) New York, New York 1 192,323 200,183 (7,860)  05/09/16 9200 Edmonston Road Greenbelt, Maryland 1 4,083 (c) 3,837 246  05/18/16 1400 L Street Washington, D.C. 1 68,399 (d) 30,053 38,346  07/14/16 600 Parsippany Road Parsippany, New Jersey 1 10,465 (e) 5,875 4,590  07/14/16 4,5,6 Century Drive (f) Parsippany, New Jersey 3 14,533 17,308 (2,775)  08/11/16 Andover Place Andover, Massachusetts 1 39,863 37,150 2,713  09/26/16 222,233 Mount Airy Road (g) Basking Ridge, New Jersey 2 8,817 9,039 (222)  09/27/16 10 Mountainview Road Upper Saddle River, New Jersey 1 18,990 19,571 (581)  Sub-total 13 452,183 359,126 93,057   Unrealized losses on rental property held for sale (24,393)  Totals 13 $ 452,183 $ 359,126 $ 68,664   (a) The Company recorded an impairment charge of $3.2 million on this property during the year ended December 31, 2015.  (b) The Company recorded impairment charges of $83.2 million on this property during the year ended December 31, 2015.  (c) The Company transferred the deed for this property to the lender in satisfaction of its obligations. The Company recorded an impairment charge of $3.0 million on this property during the year ended December 31, 2012.  (d) $28.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (e) $10.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (f) The Company recorded impairment charges of $9.8 million on these properties during the year ended December 31, 2015.  (g) The Company recorded impairment charges of $1 million on these properties during the year ended December 31, 2015.    The following table summarizes income (loss) for the three and nine month periods ended September 30, 2016 and 2015 from the properties disposed of during the nine months ended September 30, 2016 and the six properties disposed of during the year ended December 31, 2015 : (dollars in thousands)    Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Total revenues $ 1,854 $ 12,934 $ 20,048 $ 47,583  Operating and other expenses (1,709) (7,273) (13,374) (25,488)  Depreciation and amortization (2,979) (7,798) (11,590) (20,061)  Interest expense (625) (1,241) (2,011) (6,621)   Income (loss) from properties disposed of $ (3,459) $ (3,378) $ (6,927) $ (4,587)   Impairments - (61,891) - (61,891)  Realized gains/unrealized Losses on dispositions 7,340 18,718 93,057 53,261   Total income (loss) from properties disposed of $ 3,881 $ (46,551) $ 86,130 $ (13,217)  Rental Property Held for Sale, Net During the three months ended September 30, 2016 , the Company signed agreements to sell 14 office properties totaling approximately 1.8 million square feet, subject to certain conditions, and identified them as held for sale as of September 30, 2016. The properties are located in Freehold, New Jersey, Roseland, New Jersey, Greenbelt, Maryland and Lanham, Maryland. The total estimated sales proceeds from the three separate sales are expected to be approximately $113 million. The Company determined that the carrying value of 11 of the office properties were not expected to be recovered from estimated net sales proceeds and accordingly recognized a n unrealized loss allowance of $24.4 million at September 30, 2016 .  The following table summarizes the rental property held for sale, net, as of September 30, 2016 : (dollars in thousands)     September 30,  2016  Land $ 34,802  Buildings and improvements 165,231  Less: Accumulated depreciation (72,842)  Less: Unrealized losses on properties held for sale (24,393)  Rental property held for sale,net $ 102,798  Other assets and liabilities related to the rental properties held for sale, as of September 30, 2016 , include $7.6 million in deferred charges, and other assets, $ 5.6 million in Unbilled rents receivable, $ 2.9 million in Accounts payable, accrued expenses and other liabilities, and $ 2.8 million in Rents received in advance and security deposits. Approximately $ 12.5 million of these assets and $2.8 million of these liabilities are expected to be written off with the completion of the sales.  Unconsolidated Joint Venture Activity O n April 1 , 2016 , the Company bought out its partner PruRose Riverwalk G , L.L.C. for $11.3 million and increased its subordinated interest in Riverwalk G Urban Renewal, L . L . C . from 25 percent to 50 percent using borrowings on the Company’s unsecured credit facility. Riverwalk G Urban Renewal , L.L.C., owns a 316 -unit operating multi-family property located in W est New York , New Jersey.  On May 26, 2016, the Company sold its 50 percent interest in Port Imperial South 15 , L . L . C . (“RiversEdge”) and its 20 percent interest in Port Imperial South 13 Urban Renewal, L.L. C . (“RiverParc”), joint ventures that own the 236 -unit and the 280 -unit multi-family operating properties, respectively, located in Weehawken, New Jersey for $6.4 million . The Company realized a gain on the sale of $5.7 million.

Investments In Unconsolidated J

Investments In Unconsolidated Joint Ventures	9 Months Ended
	Sep. 30, 2016
Investments In Unconsolidated Joint Ventures	4. INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES  As of September 30, 2016 , the Company had an aggregate investment of approximately $319.8 million in its equity method joint ventures. The Company formed these ventures with unaffiliated third parties, or acquired interests in them, to develop or manage primarily office and multi-family rental properties, or to acquire land in anticipation of possible development of office and multi-family rental properties. As of September 30, 2016 , the unconsolidated joint ventures owned: 36 office and two retail properties aggregating approximately 5.7 million square feet, 10 multi-family properties totaling 3,587 apartments, a 350 -room hotel, development projects for up to approximately 822 apartments; and interests and/or rights to developable land parcels able to accommodate up to 4,151 apartments. The Company’s unconsolidated interests range from 7.5 percent to 85 percent subject to specified priority allocations in certain of the joint ventures.  The amounts reflected in the following tables (except for the Company’s share of equity in earnings) are based on the historical financial information of the individual joint ventures. The Company does not record losses of the joint ventures in excess of its investment balances unless the Company is liable for the obligations of the joint venture or is otherwise committed to provide financial support to the joint venture. The outside basis portion of the Company’s investments in 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 September 30, 2016 , such debt had a total facility amount of $272.2 million of which the Company agreed to guarantee up to $22 million. As of September 30, 2016 , the outstanding balance of such debt totaled $221.8 million of which $22 million was guaranteed by the Company. The Company performed management, leasing, development and other services for the properties owned by the unconsolidated joint ventures and recognized $0.9 million and $1.4 million for such services in the three months ended September 30, 2016 and 2015 , respectively . T he Company had $ 1.4 million and $0.8 million in accounts receivable due from its unconsolidated joint ventures as of September 30, 2016 and December 31, 2015 , respectively.  Included in the Company’s investments in unconsolidated joint ventures as of September 30, 2016 are four 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 $ 183.6 million as of September 30, 2016 . The Company’s maximum exposure to loss as a result of its involvement with these VIEs is estimated to be approximately $ 205.6 million, which includes the Company’s current investment and estimated future funding commitments/guarantees of approximately $ 22 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 September 30, 2016 and December 31, 2015 : (dollars in thousands , including footnotes )    Property Debt  Number of Company's Carrying Value As of September 30, 2016  Apartment Units Effective September 30, December 31, Maturity Interest  Entity / Property Name or Rentable Square Feet (sf) Ownership % (a) 2016 2015 Balance Date Rate  Multi-family  Marbella RoseGarden, L.L.C./ Marbella (b) 412 units 24.27 % $ 15,360 $ 15,569 $ 95,000 05/01/18 4.99 %  RoseGarden Monaco Holdings, L.L.C./ Monaco (b) 523 units 15.00 % 68 937 165,000 02/01/21 4.19 %  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (b) (c) 130 units 12.50 % 6,958 5,723 44,190 (d) (d)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (b) (e) 316 units 50.00 % 10,464 - 79,067 07/15/21 6.00 % (f)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) (b) 355 units 7.50 % - - 128,100 03/01/30 4.00 %  Crystal House Apartments Investors LLC / Crystal House (g) 794 units 25.00 % 30,493 28,114 165,000 04/01/20 3.17 %  Roseland/Port Imperial Partners, L.P./ Riverwalk C (b) (h) 363 units 20.00 % 1,678 1,678 - - -  RoseGarden Marbella South, L.L.C./ Marbella II 311 units 24.27 % 17,895 16,728 72,955 03/30/17 L+2.25 % (i)  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) (b) 227 units 7.50 % - - 81,900 03/01/30 4.00 %  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison 141 units 45.00 % 2,169 2,544 30,000 08/01/25 3.70 %  Capitol Place Mezz LLC / Station Townhouses 378 units 50.00 % 44,103 46,267 100,700 07/01/33 4.82 %  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside 763 units 85.00 % 99,358 96,799 142,746 08/01/29 5.197 % (j)  RoseGarden Monaco, L.L.C./ San Remo Land 250 potential units 41.67 % 1,385 1,339 - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing 850 potential units 50.00 % 337 337 - - -  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 160,000 sf 50.00 % 1,962 1,962 - - -  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 1,225,000 sf 50.00 % 4,311 4,055 - - -   Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 92,878 sf 50.00 % 4,204 4,140 14,626 05/17/17 L+3.00 %  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 139,750 sf 50.00 % 6,157 5,890 11,420 07/01/23 2.87 %  BNES Associates III / Offices at Crystal Lake 106,345 sf 31.25 % 2,695 2,295 5,646 11/01/23 4.76 %  KPG-P 100 IMW JV, LLC / 100 Independence Mall West 339,615 sf 33.33 % - - 72,000 09/08/18 L+5.95 % (k)  Keystone-Penn 1,842,820 sf (l) - - 235,124 (m) (m)  Keystone-TriState 1,266,384 sf (n) 2,771 3,958 218,321 (o) (o)  KPG-MCG Curtis JV, L.L.C./ Curtis Center (p) 885,000 sf 50.00 % 64,909 59,858 (q) (q) (q)   Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (b) 30,745 sf 20.00 % 1,719 1,758 - - -  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 350 rooms 50.00 % (r) (r) 100,000 10/01/26 3.668 %  Other (s) 811 3,506 - - -  Totals: $ 319,807 $ 303,457 $ 1,761,795       (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 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) Property debt balance consists of: (i) an amortizable loan, collateralized by the Metropolitan at 40 Park, with a balance of $37,836 , bears interest at 3.25 percent, matures in September 2020 ; (ii) an amortizable loan, collateralized by the Shops at 40 Park, with a balance of $6,354 , bears interest at 3.63 percent, matures in August 2018 .  (e) During the second quarter 2016, the Company acquired the equity interests of its joint venture partner in Portside Apartment Holdings, L.L.C and PruRose Riverwalk G, L.L.C. for $39.6 million and $11.3 million, respectively, which increased its ownership to 100 percent in Portside Apartment Holdings, LLC and 50 percent in Riverwalk G Urban Renewal, L.L.C. (See Note 3: Recent Transactions – Acquisitions).  (f) The loan was refinanced in October 2016. The new $82 million loan matures in October 2026 and has an interest rate of 3.21 percent.  (g) 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.  (h) The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J that can accommodate the development of 836 apartment units.  (i) 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.  (j) The construction/permanent loan has a maximum borrowing amount of $192,000 .  (k) The mortgage loan has three one -year extension options, subject to certain conditions.  (l) The Company’s equity interests in the joint ventures will be subordinated to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (m) Principal balance of $127,538 bears interest at 5.114 percent and matures on August 27, 2023 ; principal balance of $45,500 bears interest at 5.01 percent and matures on September 6, 2025 ; principal balance of $17,911 bears interest at 8.0 percent and matures on October 31, 2016 ; principal balance of $22,500 bears interest at LIBOR+5.2 percent t and matures on August 31, 2019 ; principal balance of $11,250 bears interest at LIBOR+5.5 percent and matures on January 9, 2019 ; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures on August 27, 2017 .  (n) Includes the Company’s pari-passu interests of $2.8 million in five properties and Company’s subordinated equity interests to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (o) Principal balance of $47,500 bears interest at 5.38 percent and matures on July 1, 2017 ; principal balance of $78,121 bears interest at rates ranging from 5.65 percent to 6.75 percent and matures on September 9, 2017 ; principal balance of $14,250 bears interest at 4.88 percent and matures on July 6, 2024 ; principal balance of $63,400 bears interest at 4.93 percent and matures on July 6, 2044 ; principal balance of $15,050 bears interest at 4.71 percent and matures on August 6, 2044 .  (p) Includes undivided interests in the same manner as investments in noncontrolling partnership, pursuant to ASC 970-323-25-12.  (q) See Note 10: Mortgages, Loans Payable and Other Obligations for debt secured by interests in these assets.  (r) The negative carrying value for this venture of $3,317 as of December 31, 2015, was included in accounts payable, accrued expenses and other liabilities.  (s) 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 Company’s equity in earnings (loss) of unconsolidated joint ventures for the three and nine months ended September 30, 2016 a nd 2015 : (dollars in thousands)    Three Months Ended Nine Months Ended  September 30, September 30,  Entity / Property Name 2016 2015 2016 2015  Multi-family  Marbella RoseGarden, L.L.C./ Marbella $ 76 $ 64 $ 208 $ 186  RoseGarden Monaco Holdings, L.L.C./ Monaco (277) (295) (869) (924)  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (76) (93) (239) (277)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (594) (151) (1,189) (681)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) - - - -  Crystal House Apartments Investors LLC / Crystal House (99) (44) (321) (41)  Roseland/Port Imperial Partners, L.P./ Riverwalk C (36) (85) (36) (394)  RoseGarden Marbella South, L.L.C./ Marbella II 105 - (202) -  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) - - - -  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison (43) (54) (173) (377)  Capitol Place Mezz LLC / Station Townhouses (500) (1,454) (1,995) (2,642)  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (42) - (60) -  RoseGarden Monaco, L.L.C./ San Remo Land - - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing - (12) (60) (32)  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 (22) - (53) (5)  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 81 102 256 258  Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 111 110 321 332  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 74 38 266 110  BNES Associates III / Offices at Crystal Lake 109 13 (68) 133  KPG-P 100 IMW JV, LLC / 100 Independence Mall West - (37) - (800)  Keystone-Penn 150 3,663 450 3,663  Keystone-TriState (518) (173) (1,186) (1,763)  KPG-MCG Curtis JV, L.L.C./ Curtis Center 113 327 518 755  Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (14) (17) (39) (52)  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 22,447 1,151 23,267 1,934  Other 745 82 826 (2,106)  Company's equity in earnings (loss) of unconsolidated joint ventures $ 21,790 $ 3,135 $ 19,622 $ (2,723)  The following is a summary of the financial position of the unconsolidated joint ventures in which the Company had investment interests as of September 30, 2016 and December 31, 2015 : (dollars in thousands)     September 30, 2016   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 41,161 $ 1,684,502 $ 1,725,663  Other assets 17,959 250,274 268,233  Total assets $ 59,120 $ 1,934,776 $ 1,993,896  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 100,000 $ 1,235,918 $ 1,335,918  Other liabilities 4,985 226,086 231,071  Partners'/members' capital (45,865) 472,772 426,907  Total liabilities and  partners'/members' capital $ 59,120 $ 1,934,776 $ 1,993,896  Company's net investment  in unconsolidated  joint ventures $ - $ 319,807 $ 319,807       December 31, 2015   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 44,925 $ 1,736,696 $ 1,781,621  Other assets 15,249 291,751 307,000  Total assets $ 60,174 $ 2,028,447 $ 2,088,621  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 63,741 $ 1,234,552 $ 1,298,293  Other liabilities 5,481 210,470 215,951  Partners'/members' capital (9,048) 583,425 574,377  Total liabilities and  partners'/members' capital $ 60,174 $ 2,028,447 $ 2,088,621  Company's net investment  in unconsolidated  joint ventures $ - $ 303,457 $ 303,457   The following is a summary of the results of operations of the unconsolidated joint ventures for the period in which the Company had investment interests during the three and nine month periods ended September 30, 2016 and 2015:     Three Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 11,262 $ 78,808 $ 90,070  Operating and other expenses (7,248) (56,411) (63,659)  Depreciation and amortization (1,499) (14,825) (16,324)  Interest expense (1,036) (12,236) (13,272)  Net income $ 1,479 $ (4,664) $ (3,185)  Company's equity in earnings  of unconsolidated  joint ventures $ 22,447 $ (657) $ 21,790    Three Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 12,390 $ 70,196 $ 82,586  Operating and other expenses (7,580) (48,389) (55,969)  Depreciation and amortization (1,501) (15,322) (16,823)  Interest expense (1,008) (13,614) (14,622)  Net income $ 2,301 $ (7,129) $ (4,828)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,151 $ 1,984 $ 3,135       Nine Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 30,973 $ 223,412 $ 254,385  Operating and other expenses (20,356) (154,320) (174,676)  Depreciation and amortization (4,478) (47,612) (52,090)  Interest expense (3,020) (37,716) (40,736)  Net income $ 3,119 $ (16,236) $ (13,117)  Company's equity in earnings  of unconsolidated  joint ventures $ 23,267 $ (3,645) $ 19,622       Nine Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 31,815 $ 206,323 $ 238,138  Operating and other expenses (20,306) (148,972) (169,278)  Depreciation and amortization (4,589) (47,043) (51,632)  Interest expense (3,051) (36,229) (39,280)  Net income $ 3,869 $ (25,921) $ (22,052)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,934 $ (4,657) $ (2,723)   Recent Transactions The South Pier at Harborside venture had a $59.1 million mortgage loan collateralized by the hotel property, which bore interest at a rate of 6.15 percent and was scheduled to mature in November 2016 . The venture also had a $3.0 million loan with the City of Jersey City, provided by the U.S. Department of Housing and Urban Development (“HUD loan”), which was guaranteed by the Company, half of which was indemnified by the venture partner. On September 14, 2016, the venture refinanced the mortgage loan and repaid in full the HUD loan , eliminating the previous guarantee which had caused the Company to carry this investment at a negative balance. The Company recorded this reversal through equity in earnings for the three months ended September 30, 2016.  The new loan, with a balance of $100.0 million at September 30, 2016, bears interest at a rate of 3.668 percent and matures in October 2026 . In connection with the refinancing , t he venture distributed $35.7 million of the loan proceeds, of which the Company’s share was $17.8 million. Due to the fact that the Company’s equity basis in this investment was now held at zero, $17.8 million was recognized as equity in earnings for the three and nine months ended September 30, 2016 . The Company has no obligations to fund future venture losses n or has any guarantees on the joint venture’s current debt.
Mack Cali Realty LP [Member]
Investments In Unconsolidated Joint Ventures	4. INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES  As of September 30, 2016 , the Company had an aggregate investment of approximately $319.8 million in its equity method joint ventures. The Company formed these ventures with unaffiliated third parties, or acquired interests in them, to develop or manage primarily office and multi-family rental properties, or to acquire land in anticipation of possible development of office and multi-family rental properties. As of September 30, 2016 , the unconsolidated joint ventures owned: 36 office and two retail properties aggregating approximately 5.7 million square feet, 10 multi-family properties totaling 3,587 apartments, a 350 -room hotel, development projects for up to approximately 822 apartments; and interests and/or rights to developable land parcels able to accommodate up to 4,151 apartments. The Company’s unconsolidated interests range from 7.5 percent to 85 percent subject to specified priority allocations in certain of the joint ventures.  The amounts reflected in the following tables (except for the Company’s share of equity in earnings) are based on the historical financial information of the individual joint ventures. The Company does not record losses of the joint ventures in excess of its investment balances unless the Company is liable for the obligations of the joint venture or is otherwise committed to provide financial support to the joint venture. The outside basis portion of the Company’s investments in 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 September 30, 2016 , such debt had a total facility amount of $272.2 million of which the Company agreed to guarantee up to $22 million. As of September 30, 2016 , the outstanding balance of such debt totaled $221.8 million of which $22 million was guaranteed by the Company. The Company performed management, leasing, development and other services for the properties owned by the unconsolidated joint ventures and recognized $0.9 million and $1.4 million for such services in the three months ended September 30, 2016 and 2015 , respectively . T he Company had $ 1.4 million and $0.8 million in accounts receivable due from its unconsolidated joint ventures as of September 30, 2016 and December 31, 2015 , respectively.  Included in the Company’s investments in unconsolidated joint ventures as of September 30, 2016 are four 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 $ 183.6 million as of September 30, 2016 . The Company’s maximum exposure to loss as a result of its involvement with these VIEs is estimated to be approximately $ 205.6 million, which includes the Company’s current investment and estimated future funding commitments/guarantees of approximately $ 22 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 September 30, 2016 and December 31, 2015 : (dollars in thousands , including footnotes )    Property Debt  Number of Company's Carrying Value As of September 30, 2016  Apartment Units Effective September 30, December 31, Maturity Interest  Entity / Property Name or Rentable Square Feet (sf) Ownership % (a) 2016 2015 Balance Date Rate  Multi-family  Marbella RoseGarden, L.L.C./ Marbella (b) 412 units 24.27 % $ 15,360 $ 15,569 $ 95,000 05/01/18 4.99 %  RoseGarden Monaco Holdings, L.L.C./ Monaco (b) 523 units 15.00 % 68 937 165,000 02/01/21 4.19 %  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (b) (c) 130 units 12.50 % 6,958 5,723 44,190 (d) (d)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (b) (e) 316 units 50.00 % 10,464 - 79,067 07/15/21 6.00 % (f)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) (b) 355 units 7.50 % - - 128,100 03/01/30 4.00 %  Crystal House Apartments Investors LLC / Crystal House (g) 794 units 25.00 % 30,493 28,114 165,000 04/01/20 3.17 %  Roseland/Port Imperial Partners, L.P./ Riverwalk C (b) (h) 363 units 20.00 % 1,678 1,678 - - -  RoseGarden Marbella South, L.L.C./ Marbella II 311 units 24.27 % 17,895 16,728 72,955 03/30/17 L+2.25 % (i)  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) (b) 227 units 7.50 % - - 81,900 03/01/30 4.00 %  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison 141 units 45.00 % 2,169 2,544 30,000 08/01/25 3.70 %  Capitol Place Mezz LLC / Station Townhouses 378 units 50.00 % 44,103 46,267 100,700 07/01/33 4.82 %  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside 763 units 85.00 % 99,358 96,799 142,746 08/01/29 5.197 % (j)  RoseGarden Monaco, L.L.C./ San Remo Land 250 potential units 41.67 % 1,385 1,339 - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing 850 potential units 50.00 % 337 337 - - -  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 160,000 sf 50.00 % 1,962 1,962 - - -  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 1,225,000 sf 50.00 % 4,311 4,055 - - -   Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 92,878 sf 50.00 % 4,204 4,140 14,626 05/17/17 L+3.00 %  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 139,750 sf 50.00 % 6,157 5,890 11,420 07/01/23 2.87 %  BNES Associates III / Offices at Crystal Lake 106,345 sf 31.25 % 2,695 2,295 5,646 11/01/23 4.76 %  KPG-P 100 IMW JV, LLC / 100 Independence Mall West 339,615 sf 33.33 % - - 72,000 09/08/18 L+5.95 % (k)  Keystone-Penn 1,842,820 sf (l) - - 235,124 (m) (m)  Keystone-TriState 1,266,384 sf (n) 2,771 3,958 218,321 (o) (o)  KPG-MCG Curtis JV, L.L.C./ Curtis Center (p) 885,000 sf 50.00 % 64,909 59,858 (q) (q) (q)   Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (b) 30,745 sf 20.00 % 1,719 1,758 - - -  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 350 rooms 50.00 % (r) (r) 100,000 10/01/26 3.668 %  Other (s) 811 3,506 - - -  Totals: $ 319,807 $ 303,457 $ 1,761,795       (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 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) Property debt balance consists of: (i) an amortizable loan, collateralized by the Metropolitan at 40 Park, with a balance of $37,836 , bears interest at 3.25 percent, matures in September 2020 ; (ii) an amortizable loan, collateralized by the Shops at 40 Park, with a balance of $6,354 , bears interest at 3.63 percent, matures in August 2018 .  (e) During the second quarter 2016, the Company acquired the equity interests of its joint venture partner in Portside Apartment Holdings, L.L.C and PruRose Riverwalk G, L.L.C. for $39.6 million and $11.3 million, respectively, which increased its ownership to 100 percent in Portside Apartment Holdings, LLC and 50 percent in Riverwalk G Urban Renewal, L.L.C. (See Note 3: Recent Transactions – Acquisitions).  (f) The loan was refinanced in October 2016. The new $82 million loan matures in October 2026 and has an interest rate of 3.21 percent.  (g) 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.  (h) The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J that can accommodate the development of 836 apartment units.  (i) 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.  (j) The construction/permanent loan has a maximum borrowing amount of $192,000 .  (k) The mortgage loan has three one -year extension options, subject to certain conditions.  (l) The Company’s equity interests in the joint ventures will be subordinated to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (m) Principal balance of $127,538 bears interest at 5.114 percent and matures on August 27, 2023 ; principal balance of $45,500 bears interest at 5.01 percent and matures on September 6, 2025 ; principal balance of $17,911 bears interest at 8.0 percent and matures on October 31, 2016 ; principal balance of $22,500 bears interest at LIBOR+5.2 percent t and matures on August 31, 2019 ; principal balance of $11,250 bears interest at LIBOR+5.5 percent and matures on January 9, 2019 ; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures on August 27, 2017 .  (n) Includes the Company’s pari-passu interests of $2.8 million in five properties and Company’s subordinated equity interests to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (o) Principal balance of $47,500 bears interest at 5.38 percent and matures on July 1, 2017 ; principal balance of $78,121 bears interest at rates ranging from 5.65 percent to 6.75 percent and matures on September 9, 2017 ; principal balance of $14,250 bears interest at 4.88 percent and matures on July 6, 2024 ; principal balance of $63,400 bears interest at 4.93 percent and matures on July 6, 2044 ; principal balance of $15,050 bears interest at 4.71 percent and matures on August 6, 2044 .  (p) Includes undivided interests in the same manner as investments in noncontrolling partnership, pursuant to ASC 970-323-25-12.  (q) See Note 10: Mortgages, Loans Payable and Other Obligations for debt secured by interests in these assets.  (r) The negative carrying value for this venture of $3,317 as of December 31, 2015, was included in accounts payable, accrued expenses and other liabilities.  (s) 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 Company’s equity in earnings (loss) of unconsolidated joint ventures for the three and nine months ended September 30, 2016 a nd 2015 : (dollars in thousands)    Three Months Ended Nine Months Ended  September 30, September 30,  Entity / Property Name 2016 2015 2016 2015  Multi-family  Marbella RoseGarden, L.L.C./ Marbella $ 76 $ 64 $ 208 $ 186  RoseGarden Monaco Holdings, L.L.C./ Monaco (277) (295) (869) (924)  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (76) (93) (239) (277)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (594) (151) (1,189) (681)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) - - - -  Crystal House Apartments Investors LLC / Crystal House (99) (44) (321) (41)  Roseland/Port Imperial Partners, L.P./ Riverwalk C (36) (85) (36) (394)  RoseGarden Marbella South, L.L.C./ Marbella II 105 - (202) -  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) - - - -  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison (43) (54) (173) (377)  Capitol Place Mezz LLC / Station Townhouses (500) (1,454) (1,995) (2,642)  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (42) - (60) -  RoseGarden Monaco, L.L.C./ San Remo Land - - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing - (12) (60) (32)  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 (22) - (53) (5)  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 81 102 256 258  Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 111 110 321 332  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 74 38 266 110  BNES Associates III / Offices at Crystal Lake 109 13 (68) 133  KPG-P 100 IMW JV, LLC / 100 Independence Mall West - (37) - (800)  Keystone-Penn 150 3,663 450 3,663  Keystone-TriState (518) (173) (1,186) (1,763)  KPG-MCG Curtis JV, L.L.C./ Curtis Center 113 327 518 755  Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (14) (17) (39) (52)  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 22,447 1,151 23,267 1,934  Other 745 82 826 (2,106)  Company's equity in earnings (loss) of unconsolidated joint ventures $ 21,790 $ 3,135 $ 19,622 $ (2,723)  The following is a summary of the financial position of the unconsolidated joint ventures in which the Company had investment interests as of September 30, 2016 and December 31, 2015 : (dollars in thousands)     September 30, 2016   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 41,161 $ 1,684,502 $ 1,725,663  Other assets 17,959 250,274 268,233  Total assets $ 59,120 $ 1,934,776 $ 1,993,896  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 100,000 $ 1,235,918 $ 1,335,918  Other liabilities 4,985 226,086 231,071  Partners'/members' capital (45,865) 472,772 426,907  Total liabilities and  partners'/members' capital $ 59,120 $ 1,934,776 $ 1,993,896  Company's net investment  in unconsolidated  joint ventures $ - $ 319,807 $ 319,807       December 31, 2015   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 44,925 $ 1,736,696 $ 1,781,621  Other assets 15,249 291,751 307,000  Total assets $ 60,174 $ 2,028,447 $ 2,088,621  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 63,741 $ 1,234,552 $ 1,298,293  Other liabilities 5,481 210,470 215,951  Partners'/members' capital (9,048) 583,425 574,377  Total liabilities and  partners'/members' capital $ 60,174 $ 2,028,447 $ 2,088,621  Company's net investment  in unconsolidated  joint ventures $ - $ 303,457 $ 303,457   The following is a summary of the results of operations of the unconsolidated joint ventures for the period in which the Company had investment interests during the three and nine month periods ended September 30, 2016 and 2015:     Three Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 11,262 $ 78,808 $ 90,070  Operating and other expenses (7,248) (56,411) (63,659)  Depreciation and amortization (1,499) (14,825) (16,324)  Interest expense (1,036) (12,236) (13,272)  Net income $ 1,479 $ (4,664) $ (3,185)  Company's equity in earnings  of unconsolidated  joint ventures $ 22,447 $ (657) $ 21,790    Three Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 12,390 $ 70,196 $ 82,586  Operating and other expenses (7,580) (48,389) (55,969)  Depreciation and amortization (1,501) (15,322) (16,823)  Interest expense (1,008) (13,614) (14,622)  Net income $ 2,301 $ (7,129) $ (4,828)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,151 $ 1,984 $ 3,135       Nine Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 30,973 $ 223,412 $ 254,385  Operating and other expenses (20,356) (154,320) (174,676)  Depreciation and amortization (4,478) (47,612) (52,090)  Interest expense (3,020) (37,716) (40,736)  Net income $ 3,119 $ (16,236) $ (13,117)  Company's equity in earnings  of unconsolidated  joint ventures $ 23,267 $ (3,645) $ 19,622       Nine Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 31,815 $ 206,323 $ 238,138  Operating and other expenses (20,306) (148,972) (169,278)  Depreciation and amortization (4,589) (47,043) (51,632)  Interest expense (3,051) (36,229) (39,280)  Net income $ 3,869 $ (25,921) $ (22,052)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,934 $ (4,657) $ (2,723)   Recent Transactions The South Pier at Harborside venture had a $59.1 million mortgage loan collateralized by the hotel property, which bore interest at a rate of 6.15 percent and was scheduled to mature in November 2016 . The venture also had a $3.0 million loan with the City of Jersey City, provided by the U.S. Department of Housing and Urban Development (“HUD loan”), which was guaranteed by the Company, half of which was indemnified by the venture partner. On September 14, 2016, the venture refinanced the mortgage loan and repaid in full the HUD loan , eliminating the previous guarantee which had caused the Company to carry this investment at a negative balance. The Company recorded this reversal through equity in earnings for the three months ended September 30, 2016.  The new loan, with a balance of $100.0 million at September 30, 2016, bears interest at a rate of 3.668 percent and matures in October 2026 . In connection with the refinancing , t he venture distributed $35.7 million of the loan proceeds, of which the Company’s share was $17.8 million. Due to the fact that the Company’s equity basis in this investment was now held at zero, $17.8 million was recognized as equity in earnings for the three and nine months ended September 30, 2016 . The Company has no obligations to fund future venture losses n or has any guarantees on the joint venture’s current debt.

Deferred Charges, Goodwill And

Deferred Charges, Goodwill And Other Assets, Net	9 Months Ended
	Sep. 30, 2016
Deferred Charges, Goodwill And Other Assets, Net	5. DEFERRED CHARGES, GOODWILL AND OTHER ASSETS, NET    September 30, December 31,  (dollars in thousands) 2016 2015  Deferred leasing costs $ 230,718 $ 239,690  Deferred financing costs - revolving credit facility (a) 5,359 5,394  236,077 245,084  Accumulated amortization (107,982) (118,014)  Deferred charges, net 128,095 127,070  Notes receivable (b) 13,313 13,496  In-place lease values, related intangibles and other assets, net 77,656 10,931  Goodwill (c) 2,945 2,945  Prepaid expenses and other assets, net (d) 81,645 49,408   Total deferred charges, goodwill and other assets, net $ 303,654 $ 203,850  (a) Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the revolving credit facility) are classified to net against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies – Deferred Financing Costs. (b) Includes as of September 30, 2016 : a mortgage receivable for $ 10.4 million which bears interest at LIBOR plus six percent and matures in August 2017 ; and an interest-free note receivable with a net present value of $ 2.9 million and matures in April 2023 . The Company believes these balances are fully collectible. (c) All goodwill is attributable to the Company’s Multi-family Services segment. (d) Includes as of September 30, 2016 , $39.0 million of proceeds from property sales held by a qualified intermediary.  DERIVATIVE FINANCIAL INSTRUMENTS  Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. As of September 30, 2016 , the Company had outstanding interest rate swaps with a combined notional value of $350 million that were designated as cash flow hedges of interest rate risk. During the nine months ending September 30, 2016 , such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt.  The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive i ncome and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three and nine months ended September 30, 2016 , the Company recorded ineffectiveness gain of $1,012,000 and zero , respectively, which is in cluded in interest and other investment income (loss) in the consolidated statements of operations, attributable to a floor mismatch in the underlying indices of the derivatives and the hedged interest payments made on its variable-rate debt. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s variable-rate debt. During the next 12 months, the Company estimates that an additional $2.7 million will be reclassified as an increase to interest expense.  Undesignated Cash Flow Hedges of Interest Rate Risk Interest rate caps not designated as hedges are not speculative and are used to manage the Company’s exposure to interest rate movements but do not meet the strict hedge accounting requirements. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings. The Company recognized expense s of zero and $12,000 for the three months ended September 30, 2016 and 2015, respectively and $2,000 and $92,000 during the nine months ended September 30, 2016 and 2015 , respectively, which is included in interest and other investment income (loss) in the consolidated statements of operations.  The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Balance Sheet as of September 30, 2016 and December 31, 2015 . (dollars in thousands)     Fair Value  Liability Derivatives designated September 30, December 31,  as hedging instruments 2016 2015 Balance sheet location  Interest rate swaps $ 7,528 $ - Accounts payable, accrued expenses and other liabilities   Asset Derivatives not designated  as hedging instruments  Interest rate caps $ - $ 2 Deferred charges, goodwill and other assets  The table below presents the effect of the Company’s derivative financial instruments on the Income Statement for the three and nine months ending September 30, 2016 and 2015 . (dollars in thousands)     Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion, Reclassification for Forecasted Transactions No Longer Probable of Occurring and Amount Excluded from Effectiveness Testing)  2016 2015 2016 2015 2016 2015  Three months ended September 30,   Interest rate swaps $ 866 $ - Interest expense $ 860 $ - Interest and other investment income (loss) $ 1,012 $ -   Nine months ended September 30,   Interest rate swaps $ (10,128) $ - Interest expense $ 2,600 $ - Interest and other investment income (loss) $ - $ -  Credit-risk-related Contingent Features The Company has agreements with each of its derivative counterparties that contain a provision where the Company could be declared in default on its derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to the Company's default on the indebtedness. As of September 30, 2016 , the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $8.0 million. As of September 30, 2016 , the Company has not posted any collateral related to these agreements. If the Company had breached any of these provisions at September 30, 2016 , it could have been required to settle its obligations under the agreements at their termination value of $8.0 million.
Mack Cali Realty LP [Member]
Deferred Charges, Goodwill And Other Assets, Net	5. DEFERRED CHARGES, GOODWILL AND OTHER ASSETS, NET    September 30, December 31,  (dollars in thousands) 2016 2015  Deferred leasing costs $ 230,718 $ 239,690  Deferred financing costs - revolving credit facility (a) 5,359 5,394  236,077 245,084  Accumulated amortization (107,982) (118,014)  Deferred charges, net 128,095 127,070  Notes receivable (b) 13,313 13,496  In-place lease values, related intangibles and other assets, net 77,656 10,931  Goodwill (c) 2,945 2,945  Prepaid expenses and other assets, net (d) 81,645 49,408   Total deferred charges, goodwill and other assets, net $ 303,654 $ 203,850  (a) Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the revolving credit facility) are classified to net against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies – Deferred Financing Costs. (b) Includes as of September 30, 2016 : a mortgage receivable for $ 10.4 million which bears interest at LIBOR plus six percent and matures in August 2017 ; and an interest-free note receivable with a net present value of $ 2.9 million and matures in April 2023 . The Company believes these balances are fully collectible. (c) All goodwill is attributable to the Company’s Multi-family Services segment. (d) Includes as of September 30, 2016 , $39.0 million of proceeds from property sales held by a qualified intermediary.  DERIVATIVE FINANCIAL INSTRUMENTS  Cash Flow Hedges of Interest Rate Risk The Company’s objectives in using interest rate derivatives are to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company primarily uses interest rate swaps as part of its interest rate risk management strategy. As of September 30, 2016 , the Company had outstanding interest rate swaps with a combined notional value of $350 million that were designated as cash flow hedges of interest rate risk. During the nine months ending September 30, 2016 , such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt.  The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive i ncome and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. During the three and nine months ended September 30, 2016 , the Company recorded ineffectiveness gain of $1,012,000 and zero , respectively, which is in cluded in interest and other investment income (loss) in the consolidated statements of operations, attributable to a floor mismatch in the underlying indices of the derivatives and the hedged interest payments made on its variable-rate debt. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on the Company’s variable-rate debt. During the next 12 months, the Company estimates that an additional $2.7 million will be reclassified as an increase to interest expense.  Undesignated Cash Flow Hedges of Interest Rate Risk Interest rate caps not designated as hedges are not speculative and are used to manage the Company’s exposure to interest rate movements but do not meet the strict hedge accounting requirements. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings. The Company recognized expense s of zero and $12,000 for the three months ended September 30, 2016 and 2015, respectively and $2,000 and $92,000 during the nine months ended September 30, 2016 and 2015 , respectively, which is included in interest and other investment income (loss) in the consolidated statements of operations.  The table below presents the fair value of the Company’s derivative financial instruments as well as their classification on the Balance Sheet as of September 30, 2016 and December 31, 2015 . (dollars in thousands)     Fair Value  Liability Derivatives designated September 30, December 31,  as hedging instruments 2016 2015 Balance sheet location  Interest rate swaps $ 7,528 $ - Accounts payable, accrued expenses and other liabilities   Asset Derivatives not designated  as hedging instruments  Interest rate caps $ - $ 2 Deferred charges, goodwill and other assets  The table below presents the effect of the Company’s derivative financial instruments on the Income Statement for the three and nine months ending September 30, 2016 and 2015 . (dollars in thousands)     Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion, Reclassification for Forecasted Transactions No Longer Probable of Occurring and Amount Excluded from Effectiveness Testing)  2016 2015 2016 2015 2016 2015  Three months ended September 30,   Interest rate swaps $ 866 $ - Interest expense $ 860 $ - Interest and other investment income (loss) $ 1,012 $ -   Nine months ended September 30,   Interest rate swaps $ (10,128) $ - Interest expense $ 2,600 $ - Interest and other investment income (loss) $ - $ -  Credit-risk-related Contingent Features The Company has agreements with each of its derivative counterparties that contain a provision where the Company could be declared in default on its derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to the Company's default on the indebtedness. As of September 30, 2016 , the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $8.0 million. As of September 30, 2016 , the Company has not posted any collateral related to these agreements. If the Company had breached any of these provisions at September 30, 2016 , it could have been required to settle its obligations under the agreements at their termination value of $8.0 million.

Restricted Cash

Restricted Cash	9 Months Ended
	Sep. 30, 2016
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)    September 30, December 31,  2016 2015  Security deposits $ 8,872 $ 7,785  Escrow and other reserve funds 45,912 27,558   Total restricted cash $ 54,784 $ 35,343 
Mack Cali Realty LP [Member]
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)    September 30, December 31,  2016 2015  Security deposits $ 8,872 $ 7,785  Escrow and other reserve funds 45,912 27,558   Total restricted cash $ 54,784 $ 35,343 

Senior Unsecured Notes

Senior Unsecured Notes	9 Months Ended
	Sep. 30, 2016
Senior Unsecured Notes	7 . SENIOR UNSECURED NOTES  On September 12, 2016, the Company commenced a tender offer to purchase for cash any and all of its $250 million principal amount , 7.750 percent Senior Unsecured Notes due August 15, 2019, subject to certain terms and conditions. On September 19, 2016, the Company purchased approximately $114.9 million principal amount of these notes validly tendered pursuant to its tender offer. The purchase price, including a make-whole premium, was 115.977 percent of the face amount of these notes, plus all accrued and unpaid interest up to the settlement date. The Company funded the purchase price, including accrued and unpaid interest, of approximately $134.1 million using available cash and borrowings on the Company’s unsecured revolving credit facility. In connection with the purchase of these notes , the Company recorded approximately $19.3 million as a loss from extinguishment of debt for the three and nine months ended September 30, 2016.  A summary of the Company’s senior unsecured notes as of September 30, 2016 and December 31, 2015 is as follows: (dollars in thousands)     September 30, December 31, Effective  2016 2015 Rate (1)  5.800% Senior Unsecured Notes, due January 15, 2016 (2) - $ 200,000 5.806 %  2.500% Senior Unsecured Notes, due December 15, 2017 $ 250,000 250,000 2.803 %  7.750% Senior Unsecured Notes, due August 15, 2019 (3) 135,136 250,000 8.017 %  4.500% Senior Unsecured Notes, due April 18, 2022 300,000 300,000 4.612 %  3.150% Senior Unsecured Notes, due May 15, 2023 275,000 275,000 3.517 %  Principal balance outstanding 960,136 1,275,000  Adjustment for unamortized debt discount (5,013) (6,156)  Unamortized deferred financing costs (3,848) (5,062)   Total senior unsecured notes, net $ 951,275 $ 1,263,782  (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 January 15, 2016, the Company repaid these notes at their maturity using proceeds from a new unsecured term loan and borrowings under the Company’s unsecured revolving credit facility. (3) On September 19, 2016, the Company purchased $114.9 million principal amount of these notes pursuant to its tender offer. See summary above.  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 under the indenture relating to its senior unsecured notes as of September 30, 2016 .
Mack Cali Realty LP [Member]
Senior Unsecured Notes	7 . SENIOR UNSECURED NOTES  On September 12, 2016, the Company commenced a tender offer to purchase for cash any and all of its $250 million principal amount , 7.750 percent Senior Unsecured Notes due August 15, 2019, subject to certain terms and conditions. On September 19, 2016, the Company purchased approximately $114.9 million principal amount of these notes validly tendered pursuant to its tender offer. The purchase price, including a make-whole premium, was 115.977 percent of the face amount of these notes, plus all accrued and unpaid interest up to the settlement date. The Company funded the purchase price, including accrued and unpaid interest, of approximately $134.1 million using available cash and borrowings on the Company’s unsecured revolving credit facility. In connection with the purchase of these notes , the Company recorded approximately $19.3 million as a loss from extinguishment of debt for the three and nine months ended September 30, 2016.  A summary of the Company’s senior unsecured notes as of September 30, 2016 and December 31, 2015 is as follows: (dollars in thousands)     September 30, December 31, Effective  2016 2015 Rate (1)  5.800% Senior Unsecured Notes, due January 15, 2016 (2) - $ 200,000 5.806 %  2.500% Senior Unsecured Notes, due December 15, 2017 $ 250,000 250,000 2.803 %  7.750% Senior Unsecured Notes, due August 15, 2019 (3) 135,136 250,000 8.017 %  4.500% Senior Unsecured Notes, due April 18, 2022 300,000 300,000 4.612 %  3.150% Senior Unsecured Notes, due May 15, 2023 275,000 275,000 3.517 %  Principal balance outstanding 960,136 1,275,000  Adjustment for unamortized debt discount (5,013) (6,156)  Unamortized deferred financing costs (3,848) (5,062)   Total senior unsecured notes, net $ 951,275 $ 1,263,782  (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 January 15, 2016, the Company repaid these notes at their maturity using proceeds from a new unsecured term loan and borrowings under the Company’s unsecured revolving credit facility. (3) On September 19, 2016, the Company purchased $114.9 million principal amount of these notes pursuant to its tender offer. See summary above.  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 under the indenture relating to its senior unsecured notes as of September 30, 2016 .

Unsecured Term Loan

Unsecured Term Loan	9 Months Ended
	Sep. 30, 2016
Unsecured Term Loan	8. UNSECURED TERM LOAN  On January 7, 2016, the Company obtained a new $ 350 million unsecured term loan, which matures in January 2019 with two one ‑ year extension options. The interest rate for the new term loan is currently 140 basis points over LIBOR, subject to adjustment on a sliding scale based on the Operating Partnership’s unsecured debt ratings, or at the Company's option, a defined leverage ratio. The Company entered into interest rate swap arrangements to fix LIBOR for the duration of the term loan. Including costs, the current all-in fixed rate is 3.13 percent. The proceeds from the loan were used primarily to repay outstanding borrowings on the Company’s unsecured revolving credit facility and to repay the Company's $200 million, 5.8 percent senior unsecured notes that matured on January 15, 2016 . As of September 30, 2016 and December 31, 2015, there was $2,170,000 and zero of unamortized deferred financing c osts related to this debt.  The interest rate on the unsecured term loan is based upon the Operating Partnership’s unsecured debt ratings, as follows:     Operating Partnership's Interest Rate -  Unsecured Debt Ratings: Applicable Basis Points  Higher of S&P or Moody's Above LIBOR  No ratings or less than BBB-/Baa3 185.0  BBB- or Baa3 (current interest rate based on Company's election) 140.0  BBB or Baa2 115.0  BBB+ or Baa1 100.0  A- or A3 or higher 90.0  If the Company elected to use the defined leverage ratio, the interest rate under the unsecured term loan would be based on the following total leverage ratio grid:     Interest Rate -  Applicable Basis  Total Leverage Ratio Points above LIBOR  < 45% 145  ≥ 45% and < 50% (current ratio) 155  ≥ 50% and < 55% 165  ≥ 55% 195  The terms of the unsecured term loan 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 term loan described below, or (ii) the property dispositions are completed while the Company is under an event of default under the term loan, 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 General Partner to continue to qualify as a REIT under the Code. The Company was in compliance with its debt covenants under its unsecured term loan as of September 30, 2016 .
Mack Cali Realty LP [Member]
Unsecured Term Loan	8. UNSECURED TERM LOAN  On January 7, 2016, the Company obtained a new $ 350 million unsecured term loan, which matures in January 2019 with two one ‑ year extension options. The interest rate for the new term loan is currently 140 basis points over LIBOR, subject to adjustment on a sliding scale based on the Operating Partnership’s unsecured debt ratings, or at the Company's option, a defined leverage ratio. The Company entered into interest rate swap arrangements to fix LIBOR for the duration of the term loan. Including costs, the current all-in fixed rate is 3.13 percent. The proceeds from the loan were used primarily to repay outstanding borrowings on the Company’s unsecured revolving credit facility and to repay the Company's $200 million, 5.8 percent senior unsecured notes that matured on January 15, 2016 . As of September 30, 2016 and December 31, 2015, there was $2,170,000 and zero of unamortized deferred financing c osts related to this debt.  The interest rate on the unsecured term loan is based upon the Operating Partnership’s unsecured debt ratings, as follows:     Operating Partnership's Interest Rate -  Unsecured Debt Ratings: Applicable Basis Points  Higher of S&P or Moody's Above LIBOR  No ratings or less than BBB-/Baa3 185.0  BBB- or Baa3 (current interest rate based on Company's election) 140.0  BBB or Baa2 115.0  BBB+ or Baa1 100.0  A- or A3 or higher 90.0  If the Company elected to use the defined leverage ratio, the interest rate under the unsecured term loan would be based on the following total leverage ratio grid:     Interest Rate -  Applicable Basis  Total Leverage Ratio Points above LIBOR  < 45% 145  ≥ 45% and < 50% (current ratio) 155  ≥ 50% and < 55% 165  ≥ 55% 195  The terms of the unsecured term loan 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 term loan described below, or (ii) the property dispositions are completed while the Company is under an event of default under the term loan, 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 General Partner to continue to qualify as a REIT under the Code. The Company was in compliance with its debt covenants under its unsecured term loan as of September 30, 2016 .

Unsecured Revolving Credit Faci

Unsecured Revolving Credit Facility	9 Months Ended
	Sep. 30, 2016
Unsecured Revolving Credit Facility	9 . UNSECURED REVOLVING CREDIT FACILITY  T he Company has a $ 600 million unsecured revolving credit facility with a group of 17 lenders. The 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 (current) 130.0 30.0  BBB or Baa2 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 General Partner to continue to qualify as a REIT under the Code. The Company was in compliance with its debt covenants under its revolving credit facility as of September 30, 2016 . As of September 30, 2016 and December 31, 2015, the Company had outstanding borrowings of $ 95 million and $155 million, respectively, under its unsecured revolving credit facility .
Mack Cali Realty LP [Member]
Unsecured Revolving Credit Facility	9 . UNSECURED REVOLVING CREDIT FACILITY  T he Company has a $ 600 million unsecured revolving credit facility with a group of 17 lenders. The 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 (current) 130.0 30.0  BBB or Baa2 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 General Partner to continue to qualify as a REIT under the Code. The Company was in compliance with its debt covenants under its revolving credit facility as of September 30, 2016 . As of September 30, 2016 and December 31, 2015, the Company had outstanding borrowings of $ 95 million and $155 million, respectively, under its unsecured revolving credit facility .

Mortgages, Loans Payable And Ot

Mortgages, Loans Payable And Other Obligations	9 Months Ended
	Sep. 30, 2016
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 , land and development projects . As of September 30, 2016 , 21 of the Company’s properties, with a total carrying value of approximately $ 1.2 b illion, and three of the Company’s development projects, with a total carrying value of approximately $146 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 under its mortgages and loans payable as of September 30, 2016 .  A summary of the Company’s mortgages, loans payable and other obligations as of September 30, 2016 and December 31, 2015 is as follows: (dollars in thousands)    Effective September 30, December 31,  Property/Project Name Lender Rate (a) 2016 2015 Maturity  Port Imperial South (b) Wells Fargo Bank N.A. LIBOR+1.75 % - $ 34,962 -  6 Becker, 85 Livingston,  75 Livingston & 20 Waterview (c) Wells Fargo CMBS 10.260 % - 63,279 -  9200 Edmonston Road (d) Principal Commercial Funding L.L.C. 9.780 % - 3,793 -  4 Becker Wells Fargo CMBS 11.260 % $ 40,180 40,631 05/11/16 (e)  Various (f) Prudential Insurance 6.332 % 141,894 143,513 01/15/17  150 Main St. (g) Webster Bank LIBOR+2.35 % 25,159 10,937 03/30/17  Curtis Center (h) CCRE & PREFG LIBOR+5.912 % (i) 75,000 64,000 10/09/17  23 Main Street JPMorgan CMBS 5.587 % 28,020 28,541 09/01/18  Port Imperial 4/5 Hotel (j) Fifth Third Bank & Santander LIBOR+4.50 % 8,311 - 10/06/18  Harborside Plaza 5 The Northwestern Mutual Life 6.842 % 214,690 217,736 11/01/18  Insurance Co. & New York Life  Insurance Co.  Chase II (k) Fifth Third Bank LIBOR+2.25 % 23,599 - 12/15/18  100 Walnut Avenue Guardian Life Insurance Co. 7.311 % 18,058 18,273 02/01/19  One River Center (l) Guardian Life Insurance Co. 7.311 % 41,367 41,859 02/01/19  Park Square Wells Fargo Bank N.A. LIBOR+1.872 % (m) 27,500 27,500 04/10/19  Port Imperial South 11 (n) JPMorgan Chase LIBOR+2.35 % 7,136 - 11/24/19  Port Imperial South 4/5 Retail American General Life & A/G PC 4.559 % 4,000 4,000 12/01/21  The Chase at Overlook Ridge New York Community Bank 3.740 % 72,500 - 02/01/23  Portside 7 (o) CBRE Capital Markets/ 3.569 % 58,998 - 08/01/23  FreddieMac  101 Hudson (p) Wells Fargo CMBS 3.197 % (q) 250,000 - 10/11/26  Port Imperial South 4/5 Garage American General Life & A/G PC 4.853 % 32,600 32,600 12/01/29   Principal balance outstanding 1,069,012 731,624  Adjustment for unamortized debt discount - (548)  Unamortized deferred financing costs (7,808) (4,465)   Total mortgages, loans payable and other obligations, net $ 1,061,204 $ 726,611           (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 January 19, 2016, the loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.  (c) On April 22, 2016, the loan was repaid at a discount for $51.5 million, using borrowings from the Company's revolving credit facility. Accordingly, the Company recognized a gain on extinguishment of debt of $12.4 million, which is included in loss on extinguishment of debt, net.  (d) On May 5, 2016, the Company transferred the deed for 9200 Edmonston Road to the lender in satisfaction of its obligations and recorded a gain of $0.2 million.  (e) The Company has begun discussions with the lender regarding the past due maturity of the loan.  (f) Mortgage is cross collateralized by seven properties. The Company has agreed, subject to certain conditions, to guarantee repayment of $61.1 million of the loan.  (g) This construction loan has a maximum borrowing capacity of $28.8 million.  (h) The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company’s $75 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.8191 percent at September 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.025 percent at September 30, 2016. The senior loan rate is based on a floating rate of one -month LIBOR plus 329 basis points and the mezzanine loan rate is based on a floating rate of one -month LIBOR plus 950 basis points. The Company has entered into LIBOR caps for the periods of the loans. In October 2016, the first of three one -year extension options was exercised by the venture.  (i) The effective interest rate includes amortization of deferred financing costs of 1.362 percent.  (j) This construction loan has a maximum borrowing capacity of $94 million.  (k) This construction loan has a maximum borrowing capacity of $48 million.  (l) Mortgage is collateralized by the three properties comprising One River Center.  (m) The effective interest rate includes amortization of deferred financing costs of 0.122 percent.  (n) This constuction loan has a maximum borrowing capacity of $78 million.  (o) This mortgage loan was obtained by the Company in July 2016 to replace a $42.5 million mortgage loan that was in place at the property acquisition date of April 1, 2016.  (p) This mortgage loan was obtained by the Company on September 30, 2016. $19.2 million of the mortgage loan principal was placed in escrow accounts directly by the lender at the loan closing.  (q) The effective interest rate includes amortization of deferred financing costs of 0.0798 percent. CASH PAID FOR INTEREST AND INTEREST CAPITALIZED Cash paid for interest for the nine months ended September 30, 2016 and 2015 was $ 89,617,000 and $ 85,019,000 , respectively. Interest capitalized by the Company for the nine months ended September 30, 2016 and 2015 was $ 14,436,000 and $ 11,744,000 , respectively (which amounts included $ 3,937,000 and $ 3,769,000 for the nine months ended September 30, 2016 and 2015 , respectively, o f interest capitalized on the Company’s investments in unconsolidated joint ventures which were substantially in development).  SUMMARY OF INDEBTEDNESS As of September 30, 2016 , the Company’s total indebtedness of $ 2,474,148,000 (weighted average interest rate of 4.48 percent) was comprised of $ 261,706,000 of revolving credit facility borrowings and other variable rate mortgage debt (weighted average rate of 3.75 percent) and fixed rate debt and other obligations of $ 2,212,442,000 (weighted average rate of 4.56 percent).  As of December 31, 2015 , the Company’s total indebtedness of $ 2,154,920,000 (weighted average interest rate of 5.22 percent) was comprised of $ 292,399,000 of revolving credit facility borrowings and other variable rate mortgage debt (weighted average rate of 2.81 percent) and fixed rate debt and other obligations of $ 1,862,521,000 (weighted average rate of 5.60 percent).
Mack Cali Realty LP [Member]
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 , land and development projects . As of September 30, 2016 , 21 of the Company’s properties, with a total carrying value of approximately $ 1.2 b illion, and three of the Company’s development projects, with a total carrying value of approximately $146 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 under its mortgages and loans payable as of September 30, 2016 .  A summary of the Company’s mortgages, loans payable and other obligations as of September 30, 2016 and December 31, 2015 is as follows: (dollars in thousands)    Effective September 30, December 31,  Property/Project Name Lender Rate (a) 2016 2015 Maturity  Port Imperial South (b) Wells Fargo Bank N.A. LIBOR+1.75 % - $ 34,962 -  6 Becker, 85 Livingston,  75 Livingston & 20 Waterview (c) Wells Fargo CMBS 10.260 % - 63,279 -  9200 Edmonston Road (d) Principal Commercial Funding L.L.C. 9.780 % - 3,793 -  4 Becker Wells Fargo CMBS 11.260 % $ 40,180 40,631 05/11/16 (e)  Various (f) Prudential Insurance 6.332 % 141,894 143,513 01/15/17  150 Main St. (g) Webster Bank LIBOR+2.35 % 25,159 10,937 03/30/17  Curtis Center (h) CCRE & PREFG LIBOR+5.912 % (i) 75,000 64,000 10/09/17  23 Main Street JPMorgan CMBS 5.587 % 28,020 28,541 09/01/18  Port Imperial 4/5 Hotel (j) Fifth Third Bank & Santander LIBOR+4.50 % 8,311 - 10/06/18  Harborside Plaza 5 The Northwestern Mutual Life 6.842 % 214,690 217,736 11/01/18  Insurance Co. & New York Life  Insurance Co.  Chase II (k) Fifth Third Bank LIBOR+2.25 % 23,599 - 12/15/18  100 Walnut Avenue Guardian Life Insurance Co. 7.311 % 18,058 18,273 02/01/19  One River Center (l) Guardian Life Insurance Co. 7.311 % 41,367 41,859 02/01/19  Park Square Wells Fargo Bank N.A. LIBOR+1.872 % (m) 27,500 27,500 04/10/19  Port Imperial South 11 (n) JPMorgan Chase LIBOR+2.35 % 7,136 - 11/24/19  Port Imperial South 4/5 Retail American General Life & A/G PC 4.559 % 4,000 4,000 12/01/21  The Chase at Overlook Ridge New York Community Bank 3.740 % 72,500 - 02/01/23  Portside 7 (o) CBRE Capital Markets/ 3.569 % 58,998 - 08/01/23  FreddieMac  101 Hudson (p) Wells Fargo CMBS 3.197 % (q) 250,000 - 10/11/26  Port Imperial South 4/5 Garage American General Life & A/G PC 4.853 % 32,600 32,600 12/01/29   Principal balance outstanding 1,069,012 731,624  Adjustment for unamortized debt discount - (548)  Unamortized deferred financing costs (7,808) (4,465)   Total mortgages, loans payable and other obligations, net $ 1,061,204 $ 726,611           (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 January 19, 2016, the loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.  (c) On April 22, 2016, the loan was repaid at a discount for $51.5 million, using borrowings from the Company's revolving credit facility. Accordingly, the Company recognized a gain on extinguishment of debt of $12.4 million, which is included in loss on extinguishment of debt, net.  (d) On May 5, 2016, the Company transferred the deed for 9200 Edmonston Road to the lender in satisfaction of its obligations and recorded a gain of $0.2 million.  (e) The Company has begun discussions with the lender regarding the past due maturity of the loan.  (f) Mortgage is cross collateralized by seven properties. The Company has agreed, subject to certain conditions, to guarantee repayment of $61.1 million of the loan.  (g) This construction loan has a maximum borrowing capacity of $28.8 million.  (h) The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company’s $75 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.8191 percent at September 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.025 percent at September 30, 2016. The senior loan rate is based on a floating rate of one -month LIBOR plus 329 basis points and the mezzanine loan rate is based on a floating rate of one -month LIBOR plus 950 basis points. The Company has entered into LIBOR caps for the periods of the loans. In October 2016, the first of three one -year extension options was exercised by the venture.  (i) The effective interest rate includes amortization of deferred financing costs of 1.362 percent.  (j) This construction loan has a maximum borrowing capacity of $94 million.  (k) This construction loan has a maximum borrowing capacity of $48 million.  (l) Mortgage is collateralized by the three properties comprising One River Center.  (m) The effective interest rate includes amortization of deferred financing costs of 0.122 percent.  (n) This constuction loan has a maximum borrowing capacity of $78 million.  (o) This mortgage loan was obtained by the Company in July 2016 to replace a $42.5 million mortgage loan that was in place at the property acquisition date of April 1, 2016.  (p) This mortgage loan was obtained by the Company on September 30, 2016. $19.2 million of the mortgage loan principal was placed in escrow accounts directly by the lender at the loan closing.  (q) The effective interest rate includes amortization of deferred financing costs of 0.0798 percent. CASH PAID FOR INTEREST AND INTEREST CAPITALIZED Cash paid for interest for the nine months ended September 30, 2016 and 2015 was $ 89,617,000 and $ 85,019,000 , respectively. Interest capitalized by the Company for the nine months ended September 30, 2016 and 2015 was $ 14,436,000 and $ 11,744,000 , respectively (which amounts included $ 3,937,000 and $ 3,769,000 for the nine months ended September 30, 2016 and 2015 , respectively, o f interest capitalized on the Company’s investments in unconsolidated joint ventures which were substantially in development).  SUMMARY OF INDEBTEDNESS As of September 30, 2016 , the Company’s total indebtedness of $ 2,474,148,000 (weighted average interest rate of 4.48 percent) was comprised of $ 261,706,000 of revolving credit facility borrowings and other variable rate mortgage debt (weighted average rate of 3.75 percent) and fixed rate debt and other obligations of $ 2,212,442,000 (weighted average rate of 4.56 percent).  As of December 31, 2015 , the Company’s total indebtedness of $ 2,154,920,000 (weighted average interest rate of 5.22 percent) was comprised of $ 292,399,000 of revolving credit facility borrowings and other variable rate mortgage debt (weighted average rate of 2.81 percent) and fixed rate debt and other obligations of $ 1,862,521,000 (weighted average rate of 5.60 percent).

Employee Benefit 401(k) Plans

Employee Benefit 401(k) Plans	9 Months Ended
	Sep. 30, 2016
Employee Benefit 401(k) Plans	1 1 . EMPLOYEE BENEFIT 401(k) PLANS  Employees of the General Partner , 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. Total expense recognized by the Company for the 401(k) Plan for the three months ended September 30, 2016 and 2015 was $ 254,000 and zero , respectively , and $ 746,000 and zero for the nine months ended September 30, 2016 and 2015 , respectively.
Mack Cali Realty LP [Member]
Employee Benefit 401(k) Plans	1 1 . EMPLOYEE BENEFIT 401(k) PLANS  Employees of the General Partner , 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. Total expense recognized by the Company for the 401(k) Plan for the three months ended September 30, 2016 and 2015 was $ 254,000 and zero , respectively , and $ 746,000 and zero for the nine months ended September 30, 2016 and 2015 , respectively.

Disclosure Of Fair Value Of Ass

Disclosure Of Fair Value Of Assets And Liabilities	9 Months Ended
	Sep. 30, 2016
Disclosure Of Fair Value Of Assets And Liabilities	12. DISCLOSURE OF FAIR VALUE OF ASSETS AND LIABILITIES  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 assets and liabilities at September 30, 2016 and December 31, 2015 . 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 September 30, 2016 and December 31, 2015 .  The fair value of the Company’s long-term debt, consisting of senior unsecured notes, an unsecured term loan, an unsecured revolving credit facility and mortgages, loans payable and other obligations aggregated approximately $ 2,483,897,000 and $ 2,150,507,000 as compared to the book value of approximately $ 2,455,309,000 and $ 2,145,393,000 as of September 30, 2016 and December 31, 2015 , respectively. The fair value of the Company’s long-term debt was categorized as a level 3 basis (as provided by ASC 820, Fair Value Measurements and Disclosures). The fair value was 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. Although the Company has determined that the majority of the inputs used to value its derivative financial instruments fall within level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivative financial instruments utilize level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. The Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivative financial instruments. As a result, the Company has determined that its derivative financial instruments valuations in their entirety are classified in level 2 of the fair value hierarchy.  The fair value measurements used in the evaluation of the Company’s rental properties are considered to be Level 3 valuations within the fair value hierarchy, as there are significant unobservable inputs. Examples of inputs utilized in the fair value calculations include estimated holding periods, discount rates, market capitalization rates, expected lease rental rates, and third party broker information. For rental properties identified as held for sale, fair value measurements used represent estimated fair value of properties, less selling costs, based on contract prices when available.  The valuation techniques and significant unobservable inputs used for the Company’s Level 3 fair value measurements at September 30, 2015 were as follows:     Fair Value at Primary  September 30, Valuation Unobservable Location Range of  Description 2015 Techniques Inputs Type Rates  Properties held and used on which the Company recognized impairment losses $ 438,606,000 Discounted cash flows Discount rate Suburban 8% - 15%  Central Business District 6% - 8%   Exit Capitalization rate Suburban 7.5% - 9%  Central Business District 4.6% - 5.75%   Disclosure about fair value of assets and liabilities is based on pertinent information available to management as of September 30, 2016 and December 31, 2015 . Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since September 30, 2016 and current estimates of fair value may differ significantly from the amounts presented herein.
Mack Cali Realty LP [Member]
Disclosure Of Fair Value Of Assets And Liabilities	12. DISCLOSURE OF FAIR VALUE OF ASSETS AND LIABILITIES  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 assets and liabilities at September 30, 2016 and December 31, 2015 . 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 September 30, 2016 and December 31, 2015 .  The fair value of the Company’s long-term debt, consisting of senior unsecured notes, an unsecured term loan, an unsecured revolving credit facility and mortgages, loans payable and other obligations aggregated approximately $ 2,483,897,000 and $ 2,150,507,000 as compared to the book value of approximately $ 2,455,309,000 and $ 2,145,393,000 as of September 30, 2016 and December 31, 2015 , respectively. The fair value of the Company’s long-term debt was categorized as a level 3 basis (as provided by ASC 820, Fair Value Measurements and Disclosures). The fair value was 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. Although the Company has determined that the majority of the inputs used to value its derivative financial instruments fall within level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivative financial instruments utilize level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. The Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivative financial instruments. As a result, the Company has determined that its derivative financial instruments valuations in their entirety are classified in level 2 of the fair value hierarchy.  The fair value measurements used in the evaluation of the Company’s rental properties are considered to be Level 3 valuations within the fair value hierarchy, as there are significant unobservable inputs. Examples of inputs utilized in the fair value calculations include estimated holding periods, discount rates, market capitalization rates, expected lease rental rates, and third party broker information. For rental properties identified as held for sale, fair value measurements used represent estimated fair value of properties, less selling costs, based on contract prices when available.  The valuation techniques and significant unobservable inputs used for the Company’s Level 3 fair value measurements at September 30, 2015 were as follows:     Fair Value at Primary  September 30, Valuation Unobservable Location Range of  Description 2015 Techniques Inputs Type Rates  Properties held and used on which the Company recognized impairment losses $ 438,606,000 Discounted cash flows Discount rate Suburban 8% - 15%  Central Business District 6% - 8%   Exit Capitalization rate Suburban 7.5% - 9%  Central Business District 4.6% - 5.75%   Disclosure about fair value of assets and liabilities is based on pertinent information available to management as of September 30, 2016 and December 31, 2015 . Although management is not aware of any factors that would significantly affect the fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since September 30, 2016 and current estimates of fair value may differ significantly from the amounts presented herein.

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments And Contingencies	1 3 . 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 $279,000 and $247,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 798,000 and $742,000 for the nine months ended September 30, 2016 and 2015 , 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 $1.1 million and $ 854,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 2.9 million and $ 2.6 million for the nine months ended September 30, 2016 and 2015 , respectively.  The Port Imperial 4/5 G arage development project agreement with the City of Weehawken has a term of five years beginning when the project is substantially complete, which occurred in the third quarter of 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 at zero percent year one and 80 percent in years two through five .  The Port Imperial South 1/3 Garage development project agreement with the City of Weehawken has a term of five years beginning when the project is substantially complete, which occurred in the fourth quarter of 2015. The agreement provides that real estate taxes be paid at 100 percent on the land value of the project only over the five year period and allows for a phase in of real estate taxes on the building improvement value at zero percent in year one and 95 percent in years two through five.  The Port Imperial Hotel development project agreement with the City of Weehawken is for a term of 15 years following substantial completion, which is anticipated to be in the first quarter 2018. The annual PILOT is equal to two percent of Total Project Costs, as defined.  The Port Imperial South 11 development project agreement with the City of Weehawken is for a term of 15 years following substantial completion, which is anticipated to be in the first quarter 2018. The annual PILOT is equal to 10 percent of Gross Revenues, as defined.  The 111 River Realty agreement with the City of Hoboken, which commenced on October 1, 2001 expires in April 2022. The PILOT payment equals $1,227,708 annually through April 2017 and then increases to $1,406,064 annually until expiration. The PILOT totaled $306,927 for the three months ended September 30, 2016.  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 September 30, 2016 , are as follows: (dollars in thousands)    Year Amount  October 1 through December 31, 2016 $ 320  2017 2,024  2018 1,989  2019 1,999  2020 2,015  2021 through 2084 172,264   Total $ 180,611 Ground lease expense incurred by the Company amounted to $ 538,000 and $102,000 d uring the three months ended September 30, 2016 and 2015 , respectively, and $ 767,000 and $305,000 during the nine months ended September 30, 2016 and 2015 , respectively.  CONSTRUCTION PROJECTS The Company owns a 76.25 percent interest in a consolidated joint venture which is constructing a 108 -unit multi-family development rental property located in Eastchester, New York (the “Eastchester Project”). The project is expected to be ready for occupancy in the fourth quarter of 2016 . The Eastchester Project is estimated to cost a total of $53.1 million (of which development costs of $49.4 million have been incurred through September 30, 2016 ). The venture has a $28.8 million construction loan (with $ 25.2 million outstanding as of September 30, 2016 ). The Company expects to fund costs of approximately $24 million for the development of the project (of which, as of September 30, 2016 , the Company has funded $20.1 million of the development costs and estimates it will need to fund an additional $3.9 million for the completion of the project).  On April 1, 2015, the Company acquired vacant land in Worcester, Massachusetts to accommodate a two-phase development of the CitySquare Project for a purchase price of $3.1 million with an additional $1.25 million to be paid (which is accrued as of September 30, 2016 ), subject to certain conditions, in accordance with the terms of the purchase and sale agreement. The first phase with 237 units started construction in the third quarter 2015 with anticipated initial deliveries in the fourth quarter 2017 . The second phase with 128 units started construction in the third quarter 2016 with anticipated initial deliveries in the third quarter 2018 . The Company has a construction loan with a maximum borrowing amount of $41.5 million and has received a term sheet to increase the loan to $58 million related to the construction of the second phase (with no outstanding balance as of September 30, 2016 ). T otal development costs for both phases are estimated to be approximately $90.5 million (of which $23.9 million was incurred by the Company through September 30, 2016 and estimates it will need to fund an additional $8.6 million for the completion of the project).  On October 6, 2015, the Company entered into a joint venture partnership with XS Port Imperial Hotel, LLC (“XS”) to form XS Hotel Urban Renewal Associates LLC (“XS Hotel URA”) for the development and ownership of a 372 -key dual branded hotel property located in Weehawken, New Jersey (“Port Imperial Hotel”). Concurrently, the Company and XS entered into a separate joint venture partnership to form XS Hotel Associates, L.L.C. (“XS Hotel”) for the management and operations of the completed hotel development. The Company holds a 90 percent interest and XS holds the remaining 10 percent interest in the consolidated joint ventures, XS Hotel URA and XS Hotel, with the Company having full and complete authority, power, and discretion to manage and control the ventures’ business, affairs, and property. The construction of the Port Imperial Hotel is estimated to cost a total of $105.9 million. The venture has a $94 million construction loan (with $ 8.3 million outstanding as of September 30, 2016 ). As of September 30, 2016 , the Company incurred development costs of $8.4 million and will not need to fund additional costs for the completion of the project.  The Company owns developable land to accommodate a multi-phase development project of approximately 1,034 -unit multi-family rental property located in Malden, Massachusetts. The initial phase commenced construction of 292 units in the third quarter of 2015 (the “Chase II Project”). The Chase II project is estimated to cost a total of $74.9 million (of which the Company has funded $26.9 million through September 30, 2016 ) and is expected to be ready for occupancy by fourth quarter of 2016 . The Company has a construction loan with a maximum borrowing amount of $48 million (with $ 23.6 million outstanding as of September 30, 2016 ). The Company will not need to fund additional costs for the completion of the Chase II P roject.  The Company own ed an office property that has been repurposed for residential use. The 197 -unit multi-family development project, which is located in Morris Plains, New Jersey (“Signature Place Project”), is expected to be ready for occupancy by the fourth quarter of 2017 . The Signature Place Project, which is estimated to cost a total of $58.7 million (of which development costs of $13.1 million have been incurred through September 30, 2016 ) is expected to be funded by a $42 million construction loan. The Company expects to fund costs of approximately $16.7 million for the development of the project, of which the Company has incurred $12.9 million as of September 30, 2016 .  The Company own s a leasehold interest in developable land for a 296 -unit multi-family development project located in East Boston, Massachusetts (“Portside 5/6 Project”). The project is expected to be ready for occupancy by the first quarter of 2018 . The Portside 5/6 Project, which is estimated to cost a total of $111.4 million (of which development costs of $27.7 million have been incurred through September 30, 2016 ), is expected to be funded primarily by a $73 million construction loan. The Company expects to fund costs of $38.4 million for the development of the project, of which the Company has funde d $26.0 million as of September 30, 2016 .  The Company owns developable land for a 295 -unit multi-family development project located in Weehawken, New Jersey (“RiverHouse 11 Project”), which began construction in the first quarter 2016. The project is expected to be ready for occupancy by first quarter 2018 . The RiverHouse 11 Project, which is estimated to cost a total of $124 million (of which development costs of $33 million have been incurred through September 30, 2016 ), is expected to be funded primarily by a $78 million construction loan. The Company expects to fund costs of $46 million for the development of the project, of which the Company has funded $25.8 million as of September 30, 2016 .  The Company owns developable land to accommodate a development project of approximately 310 -unit multi-family rental property located in Conshohocken, Pennsylvania, which began construction in the third quarter of 2016 (the “51 Washington Street Project”) with anticipated initial occupancy in the fourth quarter of 2018 . The 51 Washington Street Project, which is estimated to cost a total of $86.1 million (of which development costs of $19.5 million have been incurred through September 30, 2016), is expected to be funded with a $54 million construction loan and the balance of $32.1 million from the Company.  OTHER Through February 2016, the Company could not dispose of or distribute certain of its properties which were originally contributed by certain unrelated common unitholders of the Operating Partnership, without the express written consent of such common unitholders, as applicable, except in a manner which did not result in recognition of any built-in-gain (which could result in an income tax liability) or which reimbursed 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 did not apply in the event that the Company sold all of its properties or in connection with a sale transaction which the Company’s Board of Directors determined was 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 expired as of February 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; and Earle I. Mack, a former 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). As of September 30, 2016 , 116 of the Company’s properties, with an aggregate carrying value of approximately $ 1.3 billion, have lapsed restrictions and are subject to these conditions.
Mack Cali Realty LP [Member]
Commitments And Contingencies	1 3 . 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 $279,000 and $247,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 798,000 and $742,000 for the nine months ended September 30, 2016 and 2015 , 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 $1.1 million and $ 854,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 2.9 million and $ 2.6 million for the nine months ended September 30, 2016 and 2015 , respectively.  The Port Imperial 4/5 G arage development project agreement with the City of Weehawken has a term of five years beginning when the project is substantially complete, which occurred in the third quarter of 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 at zero percent year one and 80 percent in years two through five .  The Port Imperial South 1/3 Garage development project agreement with the City of Weehawken has a term of five years beginning when the project is substantially complete, which occurred in the fourth quarter of 2015. The agreement provides that real estate taxes be paid at 100 percent on the land value of the project only over the five year period and allows for a phase in of real estate taxes on the building improvement value at zero percent in year one and 95 percent in years two through five.  The Port Imperial Hotel development project agreement with the City of Weehawken is for a term of 15 years following substantial completion, which is anticipated to be in the first quarter 2018. The annual PILOT is equal to two percent of Total Project Costs, as defined.  The Port Imperial South 11 development project agreement with the City of Weehawken is for a term of 15 years following substantial completion, which is anticipated to be in the first quarter 2018. The annual PILOT is equal to 10 percent of Gross Revenues, as defined.  The 111 River Realty agreement with the City of Hoboken, which commenced on October 1, 2001 expires in April 2022. The PILOT payment equals $1,227,708 annually through April 2017 and then increases to $1,406,064 annually until expiration. The PILOT totaled $306,927 for the three months ended September 30, 2016.  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 September 30, 2016 , are as follows: (dollars in thousands)    Year Amount  October 1 through December 31, 2016 $ 320  2017 2,024  2018 1,989  2019 1,999  2020 2,015  2021 through 2084 172,264   Total $ 180,611 Ground lease expense incurred by the Company amounted to $ 538,000 and $102,000 d uring the three months ended September 30, 2016 and 2015 , respectively, and $ 767,000 and $305,000 during the nine months ended September 30, 2016 and 2015 , respectively.  CONSTRUCTION PROJECTS The Company owns a 76.25 percent interest in a consolidated joint venture which is constructing a 108 -unit multi-family development rental property located in Eastchester, New York (the “Eastchester Project”). The project is expected to be ready for occupancy in the fourth quarter of 2016 . The Eastchester Project is estimated to cost a total of $53.1 million (of which development costs of $49.4 million have been incurred through September 30, 2016 ). The venture has a $28.8 million construction loan (with $ 25.2 million outstanding as of September 30, 2016 ). The Company expects to fund costs of approximately $24 million for the development of the project (of which, as of September 30, 2016 , the Company has funded $20.1 million of the development costs and estimates it will need to fund an additional $3.9 million for the completion of the project).  On April 1, 2015, the Company acquired vacant land in Worcester, Massachusetts to accommodate a two-phase development of the CitySquare Project for a purchase price of $3.1 million with an additional $1.25 million to be paid (which is accrued as of September 30, 2016 ), subject to certain conditions, in accordance with the terms of the purchase and sale agreement. The first phase with 237 units started construction in the third quarter 2015 with anticipated initial deliveries in the fourth quarter 2017 . The second phase with 128 units started construction in the third quarter 2016 with anticipated initial deliveries in the third quarter 2018 . The Company has a construction loan with a maximum borrowing amount of $41.5 million and has received a term sheet to increase the loan to $58 million related to the construction of the second phase (with no outstanding balance as of September 30, 2016 ). T otal development costs for both phases are estimated to be approximately $90.5 million (of which $23.9 million was incurred by the Company through September 30, 2016 and estimates it will need to fund an additional $8.6 million for the completion of the project).  On October 6, 2015, the Company entered into a joint venture partnership with XS Port Imperial Hotel, LLC (“XS”) to form XS Hotel Urban Renewal Associates LLC (“XS Hotel URA”) for the development and ownership of a 372 -key dual branded hotel property located in Weehawken, New Jersey (“Port Imperial Hotel”). Concurrently, the Company and XS entered into a separate joint venture partnership to form XS Hotel Associates, L.L.C. (“XS Hotel”) for the management and operations of the completed hotel development. The Company holds a 90 percent interest and XS holds the remaining 10 percent interest in the consolidated joint ventures, XS Hotel URA and XS Hotel, with the Company having full and complete authority, power, and discretion to manage and control the ventures’ business, affairs, and property. The construction of the Port Imperial Hotel is estimated to cost a total of $105.9 million. The venture has a $94 million construction loan (with $ 8.3 million outstanding as of September 30, 2016 ). As of September 30, 2016 , the Company incurred development costs of $8.4 million and will not need to fund additional costs for the completion of the project.  The Company owns developable land to accommodate a multi-phase development project of approximately 1,034 -unit multi-family rental property located in Malden, Massachusetts. The initial phase commenced construction of 292 units in the third quarter of 2015 (the “Chase II Project”). The Chase II project is estimated to cost a total of $74.9 million (of which the Company has funded $26.9 million through September 30, 2016 ) and is expected to be ready for occupancy by fourth quarter of 2016 . The Company has a construction loan with a maximum borrowing amount of $48 million (with $ 23.6 million outstanding as of September 30, 2016 ). The Company will not need to fund additional costs for the completion of the Chase II P roject.  The Company own ed an office property that has been repurposed for residential use. The 197 -unit multi-family development project, which is located in Morris Plains, New Jersey (“Signature Place Project”), is expected to be ready for occupancy by the fourth quarter of 2017 . The Signature Place Project, which is estimated to cost a total of $58.7 million (of which development costs of $13.1 million have been incurred through September 30, 2016 ) is expected to be funded by a $42 million construction loan. The Company expects to fund costs of approximately $16.7 million for the development of the project, of which the Company has incurred $12.9 million as of September 30, 2016 .  The Company own s a leasehold interest in developable land for a 296 -unit multi-family development project located in East Boston, Massachusetts (“Portside 5/6 Project”). The project is expected to be ready for occupancy by the first quarter of 2018 . The Portside 5/6 Project, which is estimated to cost a total of $111.4 million (of which development costs of $27.7 million have been incurred through September 30, 2016 ), is expected to be funded primarily by a $73 million construction loan. The Company expects to fund costs of $38.4 million for the development of the project, of which the Company has funde d $26.0 million as of September 30, 2016 .  The Company owns developable land for a 295 -unit multi-family development project located in Weehawken, New Jersey (“RiverHouse 11 Project”), which began construction in the first quarter 2016. The project is expected to be ready for occupancy by first quarter 2018 . The RiverHouse 11 Project, which is estimated to cost a total of $124 million (of which development costs of $33 million have been incurred through September 30, 2016 ), is expected to be funded primarily by a $78 million construction loan. The Company expects to fund costs of $46 million for the development of the project, of which the Company has funded $25.8 million as of September 30, 2016 .  The Company owns developable land to accommodate a development project of approximately 310 -unit multi-family rental property located in Conshohocken, Pennsylvania, which began construction in the third quarter of 2016 (the “51 Washington Street Project”) with anticipated initial occupancy in the fourth quarter of 2018 . The 51 Washington Street Project, which is estimated to cost a total of $86.1 million (of which development costs of $19.5 million have been incurred through September 30, 2016), is expected to be funded with a $54 million construction loan and the balance of $32.1 million from the Company.  OTHER Through February 2016, the Company could not dispose of or distribute certain of its properties which were originally contributed by certain unrelated common unitholders of the Operating Partnership, without the express written consent of such common unitholders, as applicable, except in a manner which did not result in recognition of any built-in-gain (which could result in an income tax liability) or which reimbursed 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 did not apply in the event that the Company sold all of its properties or in connection with a sale transaction which the Company’s Board of Directors determined was 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 expired as of February 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; and Earle I. Mack, a former 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). As of September 30, 2016 , 116 of the Company’s properties, with an aggregate carrying value of approximately $ 1.3 billion, have lapsed restrictions and are subject to these conditions.

Tenant Leases

Tenant Leases	9 Months Ended
	Sep. 30, 2016
Tenant Leases	1 4 . 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 September 30, 2016 are as follows (dollars in thousands) :     Year Amount  October 1 through December 31, 2016 $ 119,973  2017 438,466  2018 379,744  2019 319,822  2020 273,424  2021 and thereafter 1,194,462   Total $ 2,725,891       Multi-family rental property residential leases are excluded from the above table as they generally expire within one year.
Mack Cali Realty LP [Member]
Tenant Leases	1 4 . 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 September 30, 2016 are as follows (dollars in thousands) :     Year Amount  October 1 through December 31, 2016 $ 119,973  2017 438,466  2018 379,744  2019 319,822  2020 273,424  2021 and thereafter 1,194,462   Total $ 2,725,891       Multi-family rental property residential leases are excluded from the above table as they generally expire within one year.

Mack-Cali Realty Corporation St

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital	9 Months Ended
	Sep. 30, 2016
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital	1 5 . MACK-CALI REALTY CORPORATION STOCKHOLDERS’ EQUITY AND MACK-CALI REALTY, L.P.’S PARTNERS’ CAPITAL  To maintain its qualification as a REIT, not more than 50 percent in value of the outstanding shares of the General Partner may be owned, directly or indirectly, by five or fewer individuals at any time during the last half of any taxable year of the General Partner , other than its initial taxable year (defined to include certain entities), applying certain constructive ownership rules. To help ensure that the General Partner will not fail this test, the General Partner ’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 General Partner 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.  Partners’ Capital in the accompanying consolidated financial statements relates to (a) General Partners’ capital consisting of common units in the Operating Partnership held by the General Partner, and (b) Limited Partners’ capital consisting of common units and LTIP Units held by the limited partners. See Note 16: Noncontrolling interests in Subsidiaries.  Any transactions resulting in the issuance of additional common and preferred stock of the General Partner result in a corresponding issuance by the Operating Partnership of an equivalent amount of common and preferred units to the General Partner.  SHARE/UNIT REPURCHASE PROGRAM In September 2012 , the Board of Directors renewed and authorized an increase to the General Partner ’s repurchase program (“Repurchase Program”). The General Partner 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 General Partner has purchased and retired 394,625 shares of its outstanding common stock for an aggregate cost of approximately $ 11 million (all of which occurred in the year ended December 31, 2012), with a remaining authorization under the Repurchase Program of $ 139 million. Concurrent with these purchases, the General Partner sold to the Operating Partnership common units for approximately $11 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 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 10 years. As of September 30, 2016 and December 31, 2015 , the stock options outstanding had a weighted average remaining contractual life of approximately 8.6 and 9.4 years, respectively.  On June 5, 2015, in connection with employment agreements entered into with each of Messrs. Rudin and DeMarco (together, the “Executive Employment Agreements”), the Company granted options to purchase a total of 800,000 shares of the Company’s common stock, exercisable for a period of ten years with an exercise price equal to the closing price of the Company’s common stock on the grant date of $17.31 per share, with 400,000 of such options vesting in three equal annual installments commencing on the first anniversary of the grant date (“Time Vesting Options”), and 400,000 of such options vesting if the Company’s common stock trades at or above $25.00 per share for 30 consecutive trading days while the executive is employed (“Price Vesting Options”), or on or before June 30, 2019, subject to certain conditions. The Price Vesting options vested on July 5, 2016 on account of the price vesting condition being achieved.  Information regarding the Company’s stock option plans is summarized below:    Weighted Aggregate  Average Intrinsic  Shares Exercise Value  Under Options Price $(000’s)  Outstanding at January 1, 2016 805,000 $ 17.33 $ 4,843  Lapsed or Cancelled - -  Outstanding at September 30, 2016 ($17.31 – $21.25) 805,000 $ 17.33 $ 7,958  Options exercisable at September 30, 2016 538,334  Available for grant at September 30, 2016 2,728,507  There were no stock options exercised under a ny stock option plans for the nine months ended September 30, 2016 and 2015 , respectively. The Company has a policy of issuing new shares to satisfy stock option exercises.  The Company recognized stock options expense of $ 924,000 and $ 185,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 1,291,000 and $248,000 for the nine months ended September 30, 2016 and 2015 , respectively .  RESTRICTED STOCK AWARDS The Company has issued stock awards (“Restricted Stock Awards”) to officers, certain other employees and non-employee 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 82,716 unvested shares were legally outstanding at September 30, 2016 . Vesting o f the Restricted Stock Awards issued to executive officers and certain other employees is based on time and service.  On June 5, 2015, in connection with the Executive Employment Agreements, the Company granted a total of 37,550.54 Restricted Stock Awards, which were valued in accordance with ASC 718 – Stock Compensation, at their fair value. These awards vest equally over a three -year period on each annual anniversary date of the grant date.  All currently outstanding and unvested Restricted Stock Awards provided to the officers , certain other employees , and members of the Board of Directors of the Company were issued under the 2013 Plan.  Information regarding the Restricted Stock Awards grant activity is summarized below:     Weighted-Average  Grant – Date  Shares Fair Value  Outstanding at January 1, 2016 136,220 $ 19.36  Granted 36,870 21.70  Vested (61,654) 18.94  Forfeited (3,687) 21.70  Outstanding at September 30, 2016 107,749 $ 20.33 As of September 30, 2016 , the Company had $0.5 million of total unrecognized compensation cost related to unvested Restricted Stock Awards granted under the Company’s stock compensation plans. That cost is expected to be recognized over a weighted average period of 0.5 years.  PERFORMANCE SHARE UNITS On June 5, 2015, in connection with the Executive Employment Agreements, the Company granted a total of 112,651.64 performance share units (“PSUs”) which will vest from 0 to 150 percent of the number of PSUs granted based on the Company’s total shareholder return relative to a peer group of equity office REITs over a three -year performance period starting from the grant date, each PSU evidencing the right to receive a share of the Company’s common stock upon vesting. The PSUs are also entitled to the payment of dividend equivalents in respect of vested PSUs in the form of additional PSUs. The PSUs were valued in accordance with ASC 718, Compensation - Stock Compensation, at their fair value on the grant date, 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 2013 Plan for issuance upon vesting of the PSUs in accordance with their terms and conditions.  As of September 30, 2016 , the Company had $ 0.8 million of total unrecognized compensation cost related to unvested PSUs granted under the Company’s stock compensation plans. That cost is expected to be recognized over a weighted average period of 1.7 years.  LONG-TERM INCENTIVE PLAN AWARDS On March 8, 2016, the Company granted Long-Term Incentive Plan (“LTIP”) awards to senior management of the Company, including all of the Company’s executive officers (the “2016 LTIP Awards”). All of the 2016 LTIP Awards were in the form of units in the Operating Partnership (“LTIP Units”) and constitute awards under the 2013 Plan. For Messrs. Rudin, DeMarco and Tycher, approximately 25 percent of the target 2016 LTIP Award was in the form of a time-based award that will vest after three years on March 8, 2019 (the “2016 TBV LTIP Units”), and the remaining approximately 75 percent of the target 2016 LTIP Award was in the form of a performance-based award under a new Outperformance Plan (the “2016 OPP”) adopted by the Company’s Board of Directors consisting of a multi-year, performance-based equity compensation plan and related forms of award agreement (the “2016 PBV LTIP Units”). For all other executive officers, approximately 40 percent of the target 2016 LTIP Award was in the form of 2016 TBV LTIP Units and the remaining approximately 60 percent of the target 2016 LTIP Award was in the form of 2016 PBV LTIP Units.  The 2016 OPP is designed to align the interests of senior management to relative and absolute performance of the Company over a three-year performance period from March 8, 2016 through March 7, 2019. The senior management team that received 2016 LTIP Awards includes the Company’s eight executive officers. Participants in the 2016 OPP will only earn the full awards if, over the three -year performance period, the Company achieves a 50 percent absolute total stockholder return (“TSR”) and if the Company is in the 75th percentile of performance versus the NAREIT Office Index.  LTIP Units will remain subject to forfeiture depending on the extent that the 2016 LTIP Awards vest. The number of LTIP Units to be issued initially to recipients of the 2016 PBV LTIP Awards is the maximum number of LTIP Units that may be earned under the awards. The number of LTIP Units that actually vest for each award recipient will be determined at the end of the performance measurement period. TSR for the Company and for the Index over the three-year measurement period and other circumstances will determine how many LTIP Units vest for each recipient; if they are fewer than the number issued initially, the balance will be forfeited as of the performance measurement date.  Prior to vesting, recipients of LTIP Units will be entitled to receive per unit distributions equal to one -tenth ( 10 percent) of the regular quarterly distributions payable on a common unit of limited partnership interest in the Operating Partnership (a “common unit”), but will not be entitled to receive any special distributions. Distributions with respect to the other nine-tenths ( 90 percent) of regular quarterly distributions payable on a common unit will accrue but shall only become payable upon vesting of the LTIP Unit. After vesting of the 2016 TBV LTIP Units or the end of the measurement period for the 2016 PBV LTIP Units, the number of LTIP Units, both vested and unvested, will be entitled to receive distributions in an amount per unit equal to distributions, both regular and special, payable on a common unit.  The Company granted a total of 499,756 PBV LTIP Units and 157,617 TBV LTIP Units. The LTIP Units were valued in accordance with ASC 718 – Stock Compensation, at their fair value. The Company has reserved shares of common stock under the 2013 Plan for issuance upon vesting and conversion of the LTIP Units in accordance with their terms and conditions.  As of September 30, 2016 , the Company had $7.4 million of total unrecognized compensation cost related to unvested 2016 LTIP Awards granted under the Company’s stock compensation plans. That cost is expected to be recognized over a weighted average period of 2.9 years.  DEFERRED STOCK COMPENSATION PLAN FOR DIRECTORS The Amended and Restated Deferred Compensation Plan for Directors, which commenced January 1, 1999, allows non ‑employee directors of the Company to elect to defer up to 100 percent of their annual retainer fee into deferred stock units. The deferred stock units are convertible into an equal number of shares of common stock upon the directors’ termination of service from the Board of Directors or a change in control of the Company, as defined in the plan. Deferred stock units are credited to each director quarterly using the closing price of the Company’s common stock on the applicable dividend record date for the respective quarter. Each participating director’s account is also credited for an equivalent amount of deferred stock units based on the dividend rate for each quarter.  During the nine months ended September 30, 2016 and 2015 , 11,249 and 15,279 deferred stock units were earned, respectively. As of September 30, 2016 and December 31, 2015 , there were 190,322 and 178,039 deferred stock units outstanding, respectively.  EARNINGS PER SHARE /UNIT Basic EPS or EPU excludes dilution and is computed by dividing net income available to common shareholders or unitholders by the weighted average number of shares or units outstanding for the period. Diluted EPS or EPU 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 and nine months ended September 30, 2016 and 2015 in accordance with ASC 260, Earning s Per Share: (dollars in thousands, except per share amounts)  Mack-Cali Realty Corporation:   Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Basic EPS 2016 2015 2016 2015  Net income (loss) $ (9,605) $ (142,141) $ 113,530 $ (106,077)  Add: Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Add (deduct): Noncontrolling interest in Operating Partnership 999 15,530 (11,947) 11,461  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034)   Weighted average common shares 89,755 89,249 89,739 89,229   Basic EPS :  Net income (loss) available to common shareholders $ (0.10) $ (1.42) $ 1.14 $ (1.05)      Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Diluted EPS 2016 2015 2016 2015  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034)  Add (deduct): Noncontrolling interest in Operating Partnership (999) (15,530) 11,947 (11,461)  Net income (loss) for diluted earnings per share $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common shares 100,253 100,172 100,486 100,236   Diluted EPS :  Net income (loss) available to common shareholders $ (0.10) $ (1.42) $ 1.13 $ (1.05)   The following schedule reconciles the shares used in the basic EPS calculation to the shares used in the diluted EPS calculation: (in thousands)   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Basic EPS shares 89,755 89,249 89,739 89,229  Add: Operating Partnership – common units 10,498 10,923 10,502 11,007  Restricted Stock Awards - - 50 -  Stock Options - - 195 -  Diluted EPS Shares 100,253 100,172 100,486 100,236 Contingently issuable shares under the PSUs and Price Vesting Options were excluded from the denominator in 2016 and 2015 because the criteria had not been met for the period ended September 30, 2016. Not included in the computations of diluted EPS were zero and 405,000 stock options as such securities were anti-dilutive during the periods ended September 30, 2016 and 2015, respectively. Also, not included in the computations of diluted EPS were all of the LTIP Units as such securities were anti-dilutive during the periods. Unvested restricted stock outstanding as of September 30, 2016 and 2015 were 82,716 and 99,006 shares, respectively.  Dividends declared per common share for each of the three-month periods ended September 30, 2016 and 2015 was $0.15 per share. Dividends declared per common share for each of the nine-month periods ended September 30, 2016 and 2015 was $0.45 per share.    Mack-Cali Realty, L.P.:    Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Basic EPU 2016 2015 2016 2015  Net income (loss) $ (9,605) $ (142,141) $ 113,530 $ (106,077)  Add: Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common units 100,253 100,172 100,241 100,236   Basic EPU :  Net income (loss) available to common unitholders $ (0.10) $ (1.42) $ 1.14 $ (1.05)    Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Diluted EPU 2016 2015 2016 2015  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common unit 100,253 100,172 100,486 100,236   Diluted EPU :  Net income (loss) available to common unitholders $ (0.10) $ (1.42) $ 1.13 $ (1.05)  The following schedule reconciles the units used in the basic EPU calculation to the units used in the diluted EPU calculation: (in thousands)     Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Basic EPU units 100,253 100,172 100,241 100,236  Add: Restricted Stock Awards - - 50 -  Stock Options - - 195 -  Diluted EPU Units 100,253 100,172 100,486 100,236  Contingently issuable shares under the PSUs and Price Vesting Options were excluded from the denominator in 2016 and 2015 because the criteria had not been met for the period ended September 30, 2016 . Not included in the computations of diluted EPU were zero and 405,000 stock options as such securities were anti-dilutive during the periods ended September 30, 2016 and 2015 , respectively. Also, not included in the computations of diluted EPU were all of the LTIP Units as such securities were anti-dilutive during the periods. Unvested restricted stock outstanding as of September 30, 2016 and 2015 were 82,716 and 99,006 shares, respectively.  Distributions declared per common unit for each of the three - month periods ended September 30, 2016 and 2015 was $0.15 per unit . Distributions declared per common unit for each of the nine -month periods ended September 30, 2016 and 2015 was $0.45 per unit.
Mack Cali Realty LP [Member]
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital	1 5 . MACK-CALI REALTY CORPORATION STOCKHOLDERS’ EQUITY AND MACK-CALI REALTY, L.P.’S PARTNERS’ CAPITAL  To maintain its qualification as a REIT, not more than 50 percent in value of the outstanding shares of the General Partner may be owned, directly or indirectly, by five or fewer individuals at any time during the last half of any taxable year of the General Partner , other than its initial taxable year (defined to include certain entities), applying certain constructive ownership rules. To help ensure that the General Partner will not fail this test, the General Partner ’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 General Partner 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.  Partners’ Capital in the accompanying consolidated financial statements relates to (a) General Partners’ capital consisting of common units in the Operating Partnership held by the General Partner, and (b) Limited Partners’ capital consisting of common units and LTIP Units held by the limited partners. See Note 16: Noncontrolling interests in Subsidiaries.  Any transactions resulting in the issuance of additional common and preferred stock of the General Partner result in a corresponding issuance by the Operating Partnership of an equivalent amount of common and preferred units to the General Partner.  SHARE/UNIT REPURCHASE PROGRAM In September 2012 , the Board of Directors renewed and authorized an increase to the General Partner ’s repurchase program (“Repurchase Program”). The General Partner 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 General Partner has purchased and retired 394,625 shares of its outstanding common stock for an aggregate cost of approximately $ 11 million (all of which occurred in the year ended December 31, 2012), with a remaining authorization under the Repurchase Program of $ 139 million. Concurrent with these purchases, the General Partner sold to the Operating Partnership common units for approximately $11 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 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 10 years. As of September 30, 2016 and December 31, 2015 , the stock options outstanding had a weighted average remaining contractual life of approximately 8.6 and 9.4 years, respectively.  On June 5, 2015, in connection with employment agreements entered into with each of Messrs. Rudin and DeMarco (together, the “Executive Employment Agreements”), the Company granted options to purchase a total of 800,000 shares of the Company’s common stock, exercisable for a period of ten years with an exercise price equal to the closing price of the Company’s common stock on the grant date of $17.31 per share, with 400,000 of such options vesting in three equal annual installments commencing on the first anniversary of the grant date (“Time Vesting Options”), and 400,000 of such options vesting if the Company’s common stock trades at or above $25.00 per share for 30 consecutive trading days while the executive is employed (“Price Vesting Options”), or on or before June 30, 2019, subject to certain conditions. The Price Vesting options vested on July 5, 2016 on account of the price vesting condition being achieved.  Information regarding the Company’s stock option plans is summarized below:    Weighted Aggregate  Average Intrinsic  Shares Exercise Value  Under Options Price $(000’s)  Outstanding at January 1, 2016 805,000 $ 17.33 $ 4,843  Lapsed or Cancelled - -  Outstanding at September 30, 2016 ($17.31 – $21.25) 805,000 $ 17.33 $ 7,958  Options exercisable at September 30, 2016 538,334  Available for grant at September 30, 2016 2,728,507  There were no stock options exercised under a ny stock option plans for the nine months ended September 30, 2016 and 2015 , respectively. The Company has a policy of issuing new shares to satisfy stock option exercises.  The Company recognized stock options expense of $ 924,000 and $ 185,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 1,291,000 and $248,000 for the nine months ended September 30, 2016 and 2015 , respectively .  RESTRICTED STOCK AWARDS The Company has issued stock awards (“Restricted Stock Awards”) to officers, certain other employees and non-employee 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 82,716 unvested shares were legally outstanding at September 30, 2016 . Vesting o f the Restricted Stock Awards issued to executive officers and certain other employees is based on time and service.  On June 5, 2015, in connection with the Executive Employment Agreements, the Company granted a total of 37,550.54 Restricted Stock Awards, which were valued in accordance with ASC 718 – Stock Compensation, at their fair value. These awards vest equally over a three -year period on each annual anniversary date of the grant date.  All currently outstanding and unvested Restricted Stock Awards provided to the officers , certain other employees , and members of the Board of Directors of the Company were issued under the 2013 Plan.  Information regarding the Restricted Stock Awards grant activity is summarized below:     Weighted-Average  Grant – Date  Shares Fair Value  Outstanding at January 1, 2016 136,220 $ 19.36  Granted 36,870 21.70  Vested (61,654) 18.94  Forfeited (3,687) 21.70  Outstanding at September 30, 2016 107,749 $ 20.33 As of September 30, 2016 , the Company had $0.5 million of total unrecognized compensation cost related to unvested Restricted Stock Awards granted under the Company’s stock compensation plans. That cost is expected to be recognized over a weighted average period of 0.5 years.  PERFORMANCE SHARE UNITS On June 5, 2015, in connection with the Executive Employment Agreements, the Company granted a total of 112,651.64 performance share units (“PSUs”) which will vest from 0 to 150 percent of the number of PSUs granted based on the Company’s total shareholder return relative to a peer group of equity office REITs over a three -year performance period starting from the grant date, each PSU evidencing the right to receive a share of the Company’s common stock upon vesting. The PSUs are also entitled to the payment of dividend equivalents in respect of vested PSUs in the form of additional PSUs. The PSUs were valued in accordance with ASC 718, Compensation - Stock Compensation, at their fair value on the grant date, 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 2013 Plan for issuance upon vesting of the PSUs in accordance with their terms and conditions.  As of September 30, 2016 , the Company had $ 0.8 million of total unrecognized compensation cost related to unvested PSUs granted under the Company’s stock compensation plans. That cost is expected to be recognized over a weighted average period of 1.7 years.  LONG-TERM INCENTIVE PLAN AWARDS On March 8, 2016, the Company granted Long-Term Incentive Plan (“LTIP”) awards to senior management of the Company, including all of the Company’s executive officers (the “2016 LTIP Awards”). All of the 2016 LTIP Awards were in the form of units in the Operating Partnership (“LTIP Units”) and constitute awards under the 2013 Plan. For Messrs. Rudin, DeMarco and Tycher, approximately 25 percent of the target 2016 LTIP Award was in the form of a time-based award that will vest after three years on March 8, 2019 (the “2016 TBV LTIP Units”), and the remaining approximately 75 percent of the target 2016 LTIP Award was in the form of a performance-based award under a new Outperformance Plan (the “2016 OPP”) adopted by the Company’s Board of Directors consisting of a multi-year, performance-based equity compensation plan and related forms of award agreement (the “2016 PBV LTIP Units”). For all other executive officers, approximately 40 percent of the target 2016 LTIP Award was in the form of 2016 TBV LTIP Units and the remaining approximately 60 percent of the target 2016 LTIP Award was in the form of 2016 PBV LTIP Units.  The 2016 OPP is designed to align the interests of senior management to relative and absolute performance of the Company over a three-year performance period from March 8, 2016 through March 7, 2019. The senior management team that received 2016 LTIP Awards includes the Company’s eight executive officers. Participants in the 2016 OPP will only earn the full awards if, over the three -year performance period, the Company achieves a 50 percent absolute total stockholder return (“TSR”) and if the Company is in the 75th percentile of performance versus the NAREIT Office Index.  LTIP Units will remain subject to forfeiture depending on the extent that the 2016 LTIP Awards vest. The number of LTIP Units to be issued initially to recipients of the 2016 PBV LTIP Awards is the maximum number of LTIP Units that may be earned under the awards. The number of LTIP Units that actually vest for each award recipient will be determined at the end of the performance measurement period. TSR for the Company and for the Index over the three-year measurement period and other circumstances will determine how many LTIP Units vest for each recipient; if they are fewer than the number issued initially, the balance will be forfeited as of the performance measurement date.  Prior to vesting, recipients of LTIP Units will be entitled to receive per unit distributions equal to one -tenth ( 10 percent) of the regular quarterly distributions payable on a common unit of limited partnership interest in the Operating Partnership (a “common unit”), but will not be entitled to receive any special distributions. Distributions with respect to the other nine-tenths ( 90 percent) of regular quarterly distributions payable on a common unit will accrue but shall only become payable upon vesting of the LTIP Unit. After vesting of the 2016 TBV LTIP Units or the end of the measurement period for the 2016 PBV LTIP Units, the number of LTIP Units, both vested and unvested, will be entitled to receive distributions in an amount per unit equal to distributions, both regular and special, payable on a common unit.  The Company granted a total of 499,756 PBV LTIP Units and 157,617 TBV LTIP Units. The LTIP Units were valued in accordance with ASC 718 – Stock Compensation, at their fair value. The Company has reserved shares of common stock under the 2013 Plan for issuance upon vesting and conversion of the LTIP Units in accordance with their terms and conditions.  As of September 30, 2016 , the Company had $7.4 million of total unrecognized compensation cost related to unvested 2016 LTIP Awards granted under the Company’s stock compensation plans. That cost is expected to be recognized over a weighted average period of 2.9 years.  DEFERRED STOCK COMPENSATION PLAN FOR DIRECTORS The Amended and Restated Deferred Compensation Plan for Directors, which commenced January 1, 1999, allows non ‑employee directors of the Company to elect to defer up to 100 percent of their annual retainer fee into deferred stock units. The deferred stock units are convertible into an equal number of shares of common stock upon the directors’ termination of service from the Board of Directors or a change in control of the Company, as defined in the plan. Deferred stock units are credited to each director quarterly using the closing price of the Company’s common stock on the applicable dividend record date for the respective quarter. Each participating director’s account is also credited for an equivalent amount of deferred stock units based on the dividend rate for each quarter.  During the nine months ended September 30, 2016 and 2015 , 11,249 and 15,279 deferred stock units were earned, respectively. As of September 30, 2016 and December 31, 2015 , there were 190,322 and 178,039 deferred stock units outstanding, respectively.  EARNINGS PER SHARE /UNIT Basic EPS or EPU excludes dilution and is computed by dividing net income available to common shareholders or unitholders by the weighted average number of shares or units outstanding for the period. Diluted EPS or EPU 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 and nine months ended September 30, 2016 and 2015 in accordance with ASC 260, Earning s Per Share: (dollars in thousands, except per share amounts)  Mack-Cali Realty Corporation:   Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Basic EPS 2016 2015 2016 2015  Net income (loss) $ (9,605) $ (142,141) $ 113,530 $ (106,077)  Add: Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Add (deduct): Noncontrolling interest in Operating Partnership 999 15,530 (11,947) 11,461  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034)   Weighted average common shares 89,755 89,249 89,739 89,229   Basic EPS :  Net income (loss) available to common shareholders $ (0.10) $ (1.42) $ 1.14 $ (1.05)      Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Diluted EPS 2016 2015 2016 2015  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034)  Add (deduct): Noncontrolling interest in Operating Partnership (999) (15,530) 11,947 (11,461)  Net income (loss) for diluted earnings per share $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common shares 100,253 100,172 100,486 100,236   Diluted EPS :  Net income (loss) available to common shareholders $ (0.10) $ (1.42) $ 1.13 $ (1.05)   The following schedule reconciles the shares used in the basic EPS calculation to the shares used in the diluted EPS calculation: (in thousands)   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Basic EPS shares 89,755 89,249 89,739 89,229  Add: Operating Partnership – common units 10,498 10,923 10,502 11,007  Restricted Stock Awards - - 50 -  Stock Options - - 195 -  Diluted EPS Shares 100,253 100,172 100,486 100,236 Contingently issuable shares under the PSUs and Price Vesting Options were excluded from the denominator in 2016 and 2015 because the criteria had not been met for the period ended September 30, 2016. Not included in the computations of diluted EPS were zero and 405,000 stock options as such securities were anti-dilutive during the periods ended September 30, 2016 and 2015, respectively. Also, not included in the computations of diluted EPS were all of the LTIP Units as such securities were anti-dilutive during the periods. Unvested restricted stock outstanding as of September 30, 2016 and 2015 were 82,716 and 99,006 shares, respectively.  Dividends declared per common share for each of the three-month periods ended September 30, 2016 and 2015 was $0.15 per share. Dividends declared per common share for each of the nine-month periods ended September 30, 2016 and 2015 was $0.45 per share.    Mack-Cali Realty, L.P.:    Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Basic EPU 2016 2015 2016 2015  Net income (loss) $ (9,605) $ (142,141) $ 113,530 $ (106,077)  Add: Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common units 100,253 100,172 100,241 100,236   Basic EPU :  Net income (loss) available to common unitholders $ (0.10) $ (1.42) $ 1.14 $ (1.05)    Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Diluted EPU 2016 2015 2016 2015  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common unit 100,253 100,172 100,486 100,236   Diluted EPU :  Net income (loss) available to common unitholders $ (0.10) $ (1.42) $ 1.13 $ (1.05)  The following schedule reconciles the units used in the basic EPU calculation to the units used in the diluted EPU calculation: (in thousands)     Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Basic EPU units 100,253 100,172 100,241 100,236  Add: Restricted Stock Awards - - 50 -  Stock Options - - 195 -  Diluted EPU Units 100,253 100,172 100,486 100,236  Contingently issuable shares under the PSUs and Price Vesting Options were excluded from the denominator in 2016 and 2015 because the criteria had not been met for the period ended September 30, 2016 . Not included in the computations of diluted EPU were zero and 405,000 stock options as such securities were anti-dilutive during the periods ended September 30, 2016 and 2015 , respectively. Also, not included in the computations of diluted EPU were all of the LTIP Units as such securities were anti-dilutive during the periods. Unvested restricted stock outstanding as of September 30, 2016 and 2015 were 82,716 and 99,006 shares, respectively.  Distributions declared per common unit for each of the three - month periods ended September 30, 2016 and 2015 was $0.15 per unit . Distributions declared per common unit for each of the nine -month periods ended September 30, 2016 and 2015 was $0.45 per unit.

Noncontrolling Interests In Sub

Noncontrolling Interests In Subsidiaries	9 Months Ended
	Sep. 30, 2016
Noncontrolling Interests In Subsidiaries	16. NONCONTROLLING INTERESTS IN SUBSIDIARIES  NONCONTROLLING INTEREST IN OPERATING PARTNERSHIP (applicable only to General Partner)  Noncontrolling interests in subsidiaries in the accompanying consolidated financial statements relate to (i) common units and LTIP units in the Operating Partnership, held by parties other than the General Partner (“Limited Partners”) , and (ii) interests in consolidated joint ventures for the portion of such ventures not owned by the Company.  The following table reflects the activity of noncontrolling interests for the nine months ended September 30, 2016 and 2015 , respectively (dollars in thousands):    Nine Months Ended  September 30,  2016 2015  Balance at January 1 $ 228,032 $ 257,230  Net income 11,487 (12,043)  Unit distributions (4,947) (4,927)  Acquisition/increase in noncontrolling interests in consolidated joint ventures (35,544) 251  Redemption of common units  for common stock (308) (5,370)  Stock compensation 1,511 -  Other comprehensive income (loss) (789) -  Rebalancing of ownership percentage  between parent and subsidiaries (865) 276  Balance at September 30 $ 198,577 $ 235,417 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 value of the noncontrolling interest shall be adjusted to reflect the change in its ownership interest in the subsidiary, with the offset to equity attributable to the parent. Accordingly, as a result of equity transactions which caused changes in ownership percentages between Mack-Cali Realty Corporation stockholders’ equity and noncontrolling interests in the Operating Partnership that occurred during the nine months ended September 30, 2016 , the Company has decreased noncontrolling interests in the Operating Partnership and increased additional paid-in capital in Mack-Cali Realty Corporation stockholders’ equity by approximately $ 0.9 million as of September 30, 2016 .  Common Units Certain individuals and entities own common units in the Operating Partnership. A common unit and a share of Common Stock of the General Partner 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 General Partner’s Common Stock, or cash equal to the fair market value of a share of the General Partner’s Common Stock at the time of redemption, for each common unit. The General Partner, 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 General Partner 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 General Partner 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.  LTIP Units On March 8, 2016, the Company granted 2016 LTIP awards to senior management of the Company, including all of the General Partner ’s executive officers. All of the 2016 LTIP Awards will be in the form of units in the Operating Partnership. See Note 15: Mack-Cali Realty Corporation Stockholders’ Equity and Mack-Cali Realty, L.P.’s Partners’ Capital – Long-Term Incentive Plan Awards.  LTIP Units are designed to qualify as “profits interests” in the Operating Partnership for federal income tax purposes. As a general matter, the profits interests characteristics of the LTIP Units mean that initially they will not be economically equivalent in value to a common unit. If and when events specified by applicable tax regulations occur, LTIP Units can over time increase in value up to the point where they are equivalent to common units on a one-for-one basis. After LTIP Units are fully vested, and to the extent the special tax rules applicable to profits interests have allowed them to become equivalent in value to common units, LTIP Units may be converted on a one-for-one basis into common units. Common units in turn have a one-for-one relationship in value with shares of the General Partner ’s common stock, and are redeemable on a one-for-one basis for cash or, at the election of the Company, shares of the General Partner ’s common stock.  Unit Transactions The following table sets forth the changes in noncontrolling interests in the Operating Partnership which relate to the common units and LTIP units in the Operating Partnership for the nine months ended September 30, 2016 :     Common LTIP  Units Units  Balance at January 1, 2016 10,516,844 -  Granted - 657,373  Redemption of common units for shares of common stock (18,898) -  Balance at September 30, 2016 10,497,946 657,373 Noncontrolling Interest Ownership in Operating Partnership As of September 30, 2016 and December 31, 2015 , the noncontrolling interest common unitholders owned 10.5 percent and 10.5 percent of the Operating Partnership, respectively.  NONCONTROLLING INTEREST IN CONSOLIDATED JOINT VENTURES (applicable to General Partner and Operating Partnership) 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 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.
Mack Cali Realty LP [Member]
Noncontrolling Interests In Subsidiaries	16. NONCONTROLLING INTERESTS IN SUBSIDIARIES  NONCONTROLLING INTEREST IN OPERATING PARTNERSHIP (applicable only to General Partner)  Noncontrolling interests in subsidiaries in the accompanying consolidated financial statements relate to (i) common units and LTIP units in the Operating Partnership, held by parties other than the General Partner (“Limited Partners”) , and (ii) interests in consolidated joint ventures for the portion of such ventures not owned by the Company.  The following table reflects the activity of noncontrolling interests for the nine months ended September 30, 2016 and 2015 , respectively (dollars in thousands):    Nine Months Ended  September 30,  2016 2015  Balance at January 1 $ 228,032 $ 257,230  Net income 11,487 (12,043)  Unit distributions (4,947) (4,927)  Acquisition/increase in noncontrolling interests in consolidated joint ventures (35,544) 251  Redemption of common units  for common stock (308) (5,370)  Stock compensation 1,511 -  Other comprehensive income (loss) (789) -  Rebalancing of ownership percentage  between parent and subsidiaries (865) 276  Balance at September 30 $ 198,577 $ 235,417 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 value of the noncontrolling interest shall be adjusted to reflect the change in its ownership interest in the subsidiary, with the offset to equity attributable to the parent. Accordingly, as a result of equity transactions which caused changes in ownership percentages between Mack-Cali Realty Corporation stockholders’ equity and noncontrolling interests in the Operating Partnership that occurred during the nine months ended September 30, 2016 , the Company has decreased noncontrolling interests in the Operating Partnership and increased additional paid-in capital in Mack-Cali Realty Corporation stockholders’ equity by approximately $ 0.9 million as of September 30, 2016 .  Common Units Certain individuals and entities own common units in the Operating Partnership. A common unit and a share of Common Stock of the General Partner 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 General Partner’s Common Stock, or cash equal to the fair market value of a share of the General Partner’s Common Stock at the time of redemption, for each common unit. The General Partner, 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 General Partner 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 General Partner 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.  LTIP Units On March 8, 2016, the Company granted 2016 LTIP awards to senior management of the Company, including all of the General Partner ’s executive officers. All of the 2016 LTIP Awards will be in the form of units in the Operating Partnership. See Note 15: Mack-Cali Realty Corporation Stockholders’ Equity and Mack-Cali Realty, L.P.’s Partners’ Capital – Long-Term Incentive Plan Awards.  LTIP Units are designed to qualify as “profits interests” in the Operating Partnership for federal income tax purposes. As a general matter, the profits interests characteristics of the LTIP Units mean that initially they will not be economically equivalent in value to a common unit. If and when events specified by applicable tax regulations occur, LTIP Units can over time increase in value up to the point where they are equivalent to common units on a one-for-one basis. After LTIP Units are fully vested, and to the extent the special tax rules applicable to profits interests have allowed them to become equivalent in value to common units, LTIP Units may be converted on a one-for-one basis into common units. Common units in turn have a one-for-one relationship in value with shares of the General Partner ’s common stock, and are redeemable on a one-for-one basis for cash or, at the election of the Company, shares of the General Partner ’s common stock.  Unit Transactions The following table sets forth the changes in noncontrolling interests in the Operating Partnership which relate to the common units and LTIP units in the Operating Partnership for the nine months ended September 30, 2016 :     Common LTIP  Units Units  Balance at January 1, 2016 10,516,844 -  Granted - 657,373  Redemption of common units for shares of common stock (18,898) -  Balance at September 30, 2016 10,497,946 657,373 Noncontrolling Interest Ownership in Operating Partnership As of September 30, 2016 and December 31, 2015 , the noncontrolling interest common unitholders owned 10.5 percent and 10.5 percent of the Operating Partnership, respectively.  NONCONTROLLING INTEREST IN CONSOLIDATED JOINT VENTURES (applicable to General Partner and Operating Partnership) 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 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	9 Months Ended
	Sep. 30, 2016
Segment Reporting	1 7 . 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 phased out this line of business in 2014. The Company had no revenues from foreign countries recorded for the nine months ended September 30, 2016 and 2015 . The Company had no long lived assets in foreign locations as of September 30, 2016 and December 31, 2015 . 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 nine months ended September 30, 2016 and 2015 and selected asset information as of September 30, 2016 and December 31, 2015 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:  September 30, 2016 $ 141,226 $ 8,806 $ 9,842 (e) $ (2,357) $ 157,517  September 30, 2015 131,910 6,964 8,409 (f) (1,125) 146,158  Nine months ended:  September 30, 2016 411,947 27,011 27,990 (e) (7,281) 459,667  September 30, 2015 406,128 20,541 24,910 (f) (3,139) 448,440   Total operating and  interest expenses (a):  Three months ended:  September 30, 2016 $ 68,533 $ 5,005 $ 9,633 (g) $ 21,269 $ 104,440  September 30, 2015 59,810 4,233 9,598 (h) 28,236 101,877  Nine months ended:  September 30, 2016 201,914 16,337 29,879 (g) 65,789 313,919  September 30, 2015 199,178 12,775 28,304 (h) 79,804 320,061   Equity in earnings (loss) of  unconsolidated joint ventures:  Three months ended:  September 30, 2016 $ 22,487 $ (1,442) $ 745 $ - $ 21,790  September 30, 2015 5,181 (2,793) 747 - 3,135  Nine months ended:  September 30, 2016 23,569 (4,773) 826 - 19,622  September 30, 2015 4,611 (8,290) 956 - (2,723)   Net operating income (loss) (b):  Three months ended:  September 30, 2016 $ 95,180 $ 2,359 $ 954 $ (23,626) $ 74,867  September 30, 2015 77,281 (62) (442) (29,361) 47,416  Nine months ended:  September 30, 2016 233,602 5,901 (1,063) (73,070) 165,370  September 30, 2015 211,561 (524) (2,438) (82,943) 125,656   Total assets:  September 30, 2016 $ 3,394,462 $ 963,569 $ 15,441 $ 62,147 $ 4,435,619  December 31, 2015 3,166,577 836,020 9,831 41,535 4,053,963   Total long-lived assets (c):  September 30, 2016 $ 3,061,298 $ 667,602 $ 4,371 $ (4,455) $ 3,728,816  December 31, 2015 2,886,583 577,705 3,670 (1,531) 3,466,427   Total investments in  unconsolidated joint ventures:  September 30, 2016 $ 80,735 $ 238,261 $ 811 $ - $ 319,807  December 31, 2015 76,140 225,850 1,467 - 303,457   (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, acquisition related costs and interest expense (net of interest income). All interest expense, net of interest and other investment 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 $ 3.8 million and $10.1 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (f) Includes $ 1.5 million and $5.9 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2015, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (g) Includes $1.8 million and $4.9 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (h) Includes $1 million and $ 4.5 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016 , respectively, from the multi-family real estate segment, which are eliminated in consolidation. Mack-Cali Realty Corporation The following schedule reconciles net operating income to net income available to common shareholders: (dollars in thousands)      Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Net operating income $ 74,867 $ 47,416 $ 165,370 $ 125,656  Add (deduct):  Depreciation and amortization (48,117) (44,099) (134,639) (127,266)  Gain on change of control of interests - - 15,347 -  Realized gains (losses) and unrealized losses on disposition of  rental property, net (17,053) 18,718 68,664 53,261  Gain on sale of investment in unconsolidated joint venture - - 5,670 6,448  Loss from extinguishment of debt, net (19,302) - (6,882) -  Impairments - (164,176) - (164,176)  Net income (loss) (9,605) (142,141) 113,530 (106,077)  Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Noncontrolling interest in Operating Partnership 999 15,530 (11,947) 11,461  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034) 
Mack Cali Realty LP [Member]
Segment Reporting	1 7 . 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 phased out this line of business in 2014. The Company had no revenues from foreign countries recorded for the nine months ended September 30, 2016 and 2015 . The Company had no long lived assets in foreign locations as of September 30, 2016 and December 31, 2015 . 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 nine months ended September 30, 2016 and 2015 and selected asset information as of September 30, 2016 and December 31, 2015 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:  September 30, 2016 $ 141,226 $ 8,806 $ 9,842 (e) $ (2,357) $ 157,517  September 30, 2015 131,910 6,964 8,409 (f) (1,125) 146,158  Nine months ended:  September 30, 2016 411,947 27,011 27,990 (e) (7,281) 459,667  September 30, 2015 406,128 20,541 24,910 (f) (3,139) 448,440   Total operating and  interest expenses (a):  Three months ended:  September 30, 2016 $ 68,533 $ 5,005 $ 9,633 (g) $ 21,269 $ 104,440  September 30, 2015 59,810 4,233 9,598 (h) 28,236 101,877  Nine months ended:  September 30, 2016 201,914 16,337 29,879 (g) 65,789 313,919  September 30, 2015 199,178 12,775 28,304 (h) 79,804 320,061   Equity in earnings (loss) of  unconsolidated joint ventures:  Three months ended:  September 30, 2016 $ 22,487 $ (1,442) $ 745 $ - $ 21,790  September 30, 2015 5,181 (2,793) 747 - 3,135  Nine months ended:  September 30, 2016 23,569 (4,773) 826 - 19,622  September 30, 2015 4,611 (8,290) 956 - (2,723)   Net operating income (loss) (b):  Three months ended:  September 30, 2016 $ 95,180 $ 2,359 $ 954 $ (23,626) $ 74,867  September 30, 2015 77,281 (62) (442) (29,361) 47,416  Nine months ended:  September 30, 2016 233,602 5,901 (1,063) (73,070) 165,370  September 30, 2015 211,561 (524) (2,438) (82,943) 125,656   Total assets:  September 30, 2016 $ 3,394,462 $ 963,569 $ 15,441 $ 62,147 $ 4,435,619  December 31, 2015 3,166,577 836,020 9,831 41,535 4,053,963   Total long-lived assets (c):  September 30, 2016 $ 3,061,298 $ 667,602 $ 4,371 $ (4,455) $ 3,728,816  December 31, 2015 2,886,583 577,705 3,670 (1,531) 3,466,427   Total investments in  unconsolidated joint ventures:  September 30, 2016 $ 80,735 $ 238,261 $ 811 $ - $ 319,807  December 31, 2015 76,140 225,850 1,467 - 303,457   (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, acquisition related costs and interest expense (net of interest income). All interest expense, net of interest and other investment 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 $ 3.8 million and $10.1 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (f) Includes $ 1.5 million and $5.9 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2015, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (g) Includes $1.8 million and $4.9 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (h) Includes $1 million and $ 4.5 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016 , respectively, from the multi-family real estate segment, which are eliminated in consolidation. Mack-Cali Realty Corporation The following schedule reconciles net operating income to net income available to common shareholders: (dollars in thousands)      Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Net operating income $ 74,867 $ 47,416 $ 165,370 $ 125,656  Add (deduct):  Depreciation and amortization (48,117) (44,099) (134,639) (127,266)  Gain on change of control of interests - - 15,347 -  Realized gains (losses) and unrealized losses on disposition of  rental property, net (17,053) 18,718 68,664 53,261  Gain on sale of investment in unconsolidated joint venture - - 5,670 6,448  Loss from extinguishment of debt, net (19,302) - (6,882) -  Impairments - (164,176) - (164,176)  Net income (loss) (9,605) (142,141) 113,530 (106,077)  Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Noncontrolling interest in Operating Partnership 999 15,530 (11,947) 11,461  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034) 

Significant Accounting Polici25

Significant Accounting Policies (Policy)	9 Months Ended
	Sep. 30, 2016
Rental Property	Rental Property Rental 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 $ 0.7 million and $ 0.9 million for the three months ended September 30, 2016 and 2015 , respectively, and $1.9 million and $3.5 million for the nine months ended September 30, 2016 and 2015 , respectively. Included in total rental property is construction, tenant improvement and development in-progress of $ 301 million and $ 88.7 million as of September 30, 2016 and December 31, 2015 , 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 differ from 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, 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 value 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. The Company generally considers assets to be held for sale when the transaction has received appropriate corporate authority, and there are no significant contingencies relating to the sale. If, in management’s opinion, the estimated net sales price, net of selling costs, of the assets which have been identified as held for sale is less than the carrying 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 value 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 Ventures The 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.  If the venture subsequently makes distributions and the Company does not have an implied or actual commitment to support the operations of the venture, including a general partner interest in the investee, the Company will not record a basis less than zero, rather such amounts will be recorded as equity in earnings of unconsolidated joint ventures. 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 value 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 Equivalents All highly liquid investments with an original maturity of three months or less when purchased are considered to be cash equivalents.
Deferred Financing Costs	 Deferred Financing Costs Costs incurred in obtaining financing are capitalized and amortized over the term of the related indebtedness. Deferred financing costs are presented in the balance sheet as a direct deduction from the carrying value of the debt liability to which they relate, except deferred financing costs related to the revolving credit facility, which are presented in deferred charges, goodwill and other assets. In all cases, amortization of such costs is included in interest expense and was $ 1,234,000 and $ 945,000 for the three months ended September 30, 2016 and 2015 , respectively, and $3,583,000 and $2,846,000 for the nine months ended September 30, 2016 and 2015 , respectively. If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (losses) from extinguishment of debt. Included in lo ss from extinguishment of debt , net of gains, of $19.3 million and $6.9 million for the three and nine months ended September 30, 2016, respectively, were unamortized deferred financing costs which were written off of $346,000 for both the three and nine months ended September 30, 2016 .
Deferred Leasing Costs	Deferred Leasing Costs Costs 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, and included in deferred charges, goodwill and other assets, net, was approximately $ 790,000 and $ 922,000 for the three months ended September 30, 2016 and 2015 , respectively, and $2,440,000 and $2,738,000 for the nine months ended September 30, 2016 and 2015 , respectively.
Goodwill	Goodwill Goodwill 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 value 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 value. If, based on this assessment, management determines that the fair value of the reporting unit is not less than its carrying value, then performing the additional two-step impairment test is unnecessary. If the carrying value of goodwill exceeds its fair value, an impairment charge is recognized.
Derivative Instruments	Derivative Instruments The 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 Recognition Base 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.  Real estate services revenue includes property management, development, construction 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.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts Management 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 Taxes The General Partner 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 General Partner 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 General Partner 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 General Partner retains and does not distribute any net capital gains, the General Partner will be required to pay federal, state and local taxes , as applicable, on such net capital gains at the rate applicable to capital gains of a corporation.  The Operating Partnership is a partnership, and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective tax returns. Accordingly, no provision or benefit for income taxes has been made in the accompanying financial statements.  T he 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 September 30, 2016 , the Company had a deferred tax asset related to its TRS activity with a balance of approximately $ 21.8 million which has been fully reserved for through a valuation allowance. If the General Partner fails to qualify as a REIT in any taxable year, the General Partner will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates. The General Partner is subject to certain state and local taxes.  Pursuant to the amended provisions related to uncertain tax provisions of ASC 740, Income Taxes, the Company recognized no material adjustments regarding its tax accounting treatment. The Company expects to recognize interest and penalties related to uncertain tax positions, if any, as income tax expense, which is included in general and administrative expense.  In the normal course of business, the Company or one of its subsidiaries is subject to examination by federal, state and local jurisdictions in which it operates, where applicable. As of September 30, 2016 , the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2011 forward.
Earnings Per Share Or Unit	Earnings Per Share or Unit The Company presents both basic and diluted earnings per share or unit (“EPS or EPU ”). Basic EPS or EPU excludes dilution and is computed by dividing net income available to common shareholders or unitholders by the weighted average number of shares or units outstanding for the period. Diluted EPS or EPU 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 or EPU from continuing operations amount. Shares or Units whose issuance is contingent upon the satisfaction of certain conditions shall be considered outstanding and included in the computation of diluted EPS or EPU as follows (i) if all necessary conditions have been satisfied by the end of the period (the events have occurred), those shares or units 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 or units included in diluted EPS or EPU shall be based on the number of shares or units , 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 or units 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 or units shall be included in the denominator of diluted EPS or EPU as of the beginning of the period (or as of the date of the grant, if later). 
Dividends And Distributions Payable	Dividends and Distributions Payable The dividends and distributions payable at September 30, 2016 represents dividends payable to common shareholders ( 89,647,443 shares) and distributions payable to noncontrolling interest unitholders of the Operating Partnership ( 10,497,946 common units and 657,373 LTIP units) for all such holders of record as of October 5, 2016 with respect to the third quarter 2016 . The third quarter 2016 common stock dividends and unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on September 27, 2016 and paid on October 14, 2016 .  The dividends and distributions payable at December 31, 2015 represents dividends payable to common shareholders ( 89,584,008 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership ( 10,516,844 common units) for all such holders of record as of January 6, 2016 with respect to the fourth quarter 2015 . The fourth quarter 2015 common stock dividends and common unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on December 8, 2015 and paid on January 15, 2016 . 
Costs Incurred For Stock Issuances	Costs Incurred For Stock Issuances Costs incurred in connection with the Company’s stock issuances are reflected as a reduction of additional paid ‑in capital. 
Stock Compensation	Stock Compensation The 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”), restricted stock units (“RSUs”), performance share units (“PSUs”), long-term incentive plan awards and stock options at the grant date be amortized ratably into expense over the appropriate vesting period. The Company recorded stock compensation expense of $ 2,046,000 and $ 695,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 4,299,000 and $1,500,000 for the nine months ended September 30, 2016 and 2015 , respectively. 
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) Other comprehensive income (loss) includes items that are recorded in equity, such as effective portions of derivatives designated as cash flow hedges or unrealized holding gains or losses on marketable securities available for sale.
Fair Value Hierarchy	Fair Value Hierarchy The 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 in active 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 Operations In April 2014, the Financial Accounting Standards Board (“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 is effective for all companies 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. The Company adopted 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.
Impact Of Recently-Issued Accounting Standards	Impact Of Recently-Issued Accounting Standards In May 2014, the 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, 2017, and early adoption is permitted for periods beginning after December 15, 2016. 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.  In August 2014, the FASB issued ASU 2014-15, which requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, and to provide certain disclosures when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. ASU 2014-15 is effective for the annual period ended December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The adoption of ASU 2014-15 is not expected to materially impact the Company’s consolidated financial statements or disclosures.  In February 2016, the FASB issued ASU 2016-02, modifying the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in the same manner as operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The guidance is expected to impact the consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee. The guidance supersedes previously issued guidance under ASC Topic 840 “Leases.” The guidance is effective on January 1, 2019, with early adoption permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s consolidated financial statements.  In March 2016, the FASB issued ASU 2016-07, which eliminates a requirement for the retroactive adjustment on a step by step basis of the investment, results of operations, and retained earnings as if the equity method had been effective during all previous periods that the investment had been held when an investment qualifies for equity method accounting due to an increase in the level of ownership or degree of influence. The cost of acquiring the additional interest in the investee is to be added to the current basis of the investor’s previously held interest and the equity method of accounting should be adopted as of the date the investment becomes qualified for equity method accounting. This guidance is to be applied on a prospective basis and is effective for interim and annual periods beginning after December 15, 2016. Early adoption is permitted for financial statements that have not been previously issued. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-07 will have on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. The new guidance allows for entities to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the guidance allows employers to withhold shares to satisfy minimum statutory tax withholding requirements up to the employees’ maximum individual tax rate without causing the award to be classified as a liability. The guidance also stipulates that cash paid by an employer to a taxing authority when directly withholding shares for tax-withholding purposes should be classified as a financing activity on the statement of cash flows. This guidance is effective for annual reporting periods beginning after December 15, 2016, and interim periods within that reporting period. Early adoption is permitted in any interim or annual period, with any adjustments reflected as of the beginning of the fiscal year of adoption. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-09 will have on the Company’s consolidated financial statements.  In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 addresses eight specific cash flow issues and intends to reduce the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This guidance is effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-15 will have on the Company’s consolidated statement of cash flows.
Mack Cali Realty LP [Member]
Rental Property	Rental Property Rental 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 $ 0.7 million and $ 0.9 million for the three months ended September 30, 2016 and 2015 , respectively, and $1.9 million and $3.5 million for the nine months ended September 30, 2016 and 2015 , respectively. Included in total rental property is construction, tenant improvement and development in-progress of $ 301 million and $ 88.7 million as of September 30, 2016 and December 31, 2015 , 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 differ from 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, 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 value 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. The Company generally considers assets to be held for sale when the transaction has received appropriate corporate authority, and there are no significant contingencies relating to the sale. If, in management’s opinion, the estimated net sales price, net of selling costs, of the assets which have been identified as held for sale is less than the carrying 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 value 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 Ventures The 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.  If the venture subsequently makes distributions and the Company does not have an implied or actual commitment to support the operations of the venture, including a general partner interest in the investee, the Company will not record a basis less than zero, rather such amounts will be recorded as equity in earnings of unconsolidated joint ventures. 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 value 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 Equivalents All highly liquid investments with an original maturity of three months or less when purchased are considered to be cash equivalents.
Deferred Financing Costs	 Deferred Financing Costs Costs incurred in obtaining financing are capitalized and amortized over the term of the related indebtedness. Deferred financing costs are presented in the balance sheet as a direct deduction from the carrying value of the debt liability to which they relate, except deferred financing costs related to the revolving credit facility, which are presented in deferred charges, goodwill and other assets. In all cases, amortization of such costs is included in interest expense and was $ 1,234,000 and $ 945,000 for the three months ended September 30, 2016 and 2015 , respectively, and $3,583,000 and $2,846,000 for the nine months ended September 30, 2016 and 2015 , respectively. If a financing obligation is extinguished early, any unamortized deferred financing costs are written off and included in gains (losses) from extinguishment of debt. Included in lo ss from extinguishment of debt , net of gains, of $19.3 million and $6.9 million for the three and nine months ended September 30, 2016, respectively, were unamortized deferred financing costs which were written off of $346,000 for both the three and nine months ended September 30, 2016 .
Deferred Leasing Costs	Deferred Leasing Costs Costs 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, and included in deferred charges, goodwill and other assets, net, was approximately $ 790,000 and $ 922,000 for the three months ended September 30, 2016 and 2015 , respectively, and $2,440,000 and $2,738,000 for the nine months ended September 30, 2016 and 2015 , respectively.
Goodwill	Goodwill Goodwill 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 value 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 value. If, based on this assessment, management determines that the fair value of the reporting unit is not less than its carrying value, then performing the additional two-step impairment test is unnecessary. If the carrying value of goodwill exceeds its fair value, an impairment charge is recognized.
Derivative Instruments	Derivative Instruments The 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 Recognition Base 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.  Real estate services revenue includes property management, development, construction 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.
Allowance For Doubtful Accounts	Allowance for Doubtful Accounts Management 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 Taxes The General Partner 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 General Partner 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 General Partner 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 General Partner retains and does not distribute any net capital gains, the General Partner will be required to pay federal, state and local taxes , as applicable, on such net capital gains at the rate applicable to capital gains of a corporation.  The Operating Partnership is a partnership, and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective tax returns. Accordingly, no provision or benefit for income taxes has been made in the accompanying financial statements.  T he 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 September 30, 2016 , the Company had a deferred tax asset related to its TRS activity with a balance of approximately $ 21.8 million which has been fully reserved for through a valuation allowance. If the General Partner fails to qualify as a REIT in any taxable year, the General Partner will be subject to federal income tax (including any applicable alternative minimum tax) on its taxable income at regular corporate tax rates. The General Partner is subject to certain state and local taxes.  Pursuant to the amended provisions related to uncertain tax provisions of ASC 740, Income Taxes, the Company recognized no material adjustments regarding its tax accounting treatment. The Company expects to recognize interest and penalties related to uncertain tax positions, if any, as income tax expense, which is included in general and administrative expense.  In the normal course of business, the Company or one of its subsidiaries is subject to examination by federal, state and local jurisdictions in which it operates, where applicable. As of September 30, 2016 , the tax years that remain subject to examination by the major tax jurisdictions under the statute of limitations are generally from the year 2011 forward.
Earnings Per Share Or Unit	Earnings Per Share or Unit The Company presents both basic and diluted earnings per share or unit (“EPS or EPU ”). Basic EPS or EPU excludes dilution and is computed by dividing net income available to common shareholders or unitholders by the weighted average number of shares or units outstanding for the period. Diluted EPS or EPU 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 or EPU from continuing operations amount. Shares or Units whose issuance is contingent upon the satisfaction of certain conditions shall be considered outstanding and included in the computation of diluted EPS or EPU as follows (i) if all necessary conditions have been satisfied by the end of the period (the events have occurred), those shares or units 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 or units included in diluted EPS or EPU shall be based on the number of shares or units , 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 or units 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 or units shall be included in the denominator of diluted EPS or EPU as of the beginning of the period (or as of the date of the grant, if later). 
Dividends And Distributions Payable	Dividends and Distributions Payable The dividends and distributions payable at September 30, 2016 represents dividends payable to common shareholders ( 89,647,443 shares) and distributions payable to noncontrolling interest unitholders of the Operating Partnership ( 10,497,946 common units and 657,373 LTIP units) for all such holders of record as of October 5, 2016 with respect to the third quarter 2016 . The third quarter 2016 common stock dividends and unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on September 27, 2016 and paid on October 14, 2016 .  The dividends and distributions payable at December 31, 2015 represents dividends payable to common shareholders ( 89,584,008 shares) and distributions payable to noncontrolling interest common unitholders of the Operating Partnership ( 10,516,844 common units) for all such holders of record as of January 6, 2016 with respect to the fourth quarter 2015 . The fourth quarter 2015 common stock dividends and common unit distributions of $ 0.15 per common share and unit were approved by the General Partner’s Board of Directors on December 8, 2015 and paid on January 15, 2016 . 
Costs Incurred For Stock Issuances	Costs Incurred For Stock Issuances Costs incurred in connection with the Company’s stock issuances are reflected as a reduction of additional paid ‑in capital. 
Stock Compensation	Stock Compensation The 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”), restricted stock units (“RSUs”), performance share units (“PSUs”), long-term incentive plan awards and stock options at the grant date be amortized ratably into expense over the appropriate vesting period. The Company recorded stock compensation expense of $ 2,046,000 and $ 695,000 for the three months ended September 30, 2016 and 2015 , respectively, and $ 4,299,000 and $1,500,000 for the nine months ended September 30, 2016 and 2015 , respectively. 
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) Other comprehensive income (loss) includes items that are recorded in equity, such as effective portions of derivatives designated as cash flow hedges or unrealized holding gains or losses on marketable securities available for sale.
Fair Value Hierarchy	Fair Value Hierarchy The 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 in active 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 Operations In April 2014, the Financial Accounting Standards Board (“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 is effective for all companies 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. The Company adopted 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.
Impact Of Recently-Issued Accounting Standards	Impact Of Recently-Issued Accounting Standards In May 2014, the 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, 2017, and early adoption is permitted for periods beginning after December 15, 2016. 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.  In August 2014, the FASB issued ASU 2014-15, which requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, and to provide certain disclosures when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. ASU 2014-15 is effective for the annual period ended December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The adoption of ASU 2014-15 is not expected to materially impact the Company’s consolidated financial statements or disclosures.  In February 2016, the FASB issued ASU 2016-02, modifying the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The new standard requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase by the lessee. This classification will determine whether lease expense is recognized based on an effective interest method or on a straight line basis over the term of the lease, respectively. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. Leases with a term of 12 months or less will be accounted for in the same manner as operating leases today. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The guidance is expected to impact the consolidated financial statements as the Company has certain operating and land lease arrangements for which it is the lessee. The guidance supersedes previously issued guidance under ASC Topic 840 “Leases.” The guidance is effective on January 1, 2019, with early adoption permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-02 will have on the Company’s consolidated financial statements.  In March 2016, the FASB issued ASU 2016-07, which eliminates a requirement for the retroactive adjustment on a step by step basis of the investment, results of operations, and retained earnings as if the equity method had been effective during all previous periods that the investment had been held when an investment qualifies for equity method accounting due to an increase in the level of ownership or degree of influence. The cost of acquiring the additional interest in the investee is to be added to the current basis of the investor’s previously held interest and the equity method of accounting should be adopted as of the date the investment becomes qualified for equity method accounting. This guidance is to be applied on a prospective basis and is effective for interim and annual periods beginning after December 15, 2016. Early adoption is permitted for financial statements that have not been previously issued. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-07 will have on the Company’s consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, intended to simplify various aspects related to how share-based payments are accounted for and presented in the financial statements. The new guidance allows for entities to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. In addition, the guidance allows employers to withhold shares to satisfy minimum statutory tax withholding requirements up to the employees’ maximum individual tax rate without causing the award to be classified as a liability. The guidance also stipulates that cash paid by an employer to a taxing authority when directly withholding shares for tax-withholding purposes should be classified as a financing activity on the statement of cash flows. This guidance is effective for annual reporting periods beginning after December 15, 2016, and interim periods within that reporting period. Early adoption is permitted in any interim or annual period, with any adjustments reflected as of the beginning of the fiscal year of adoption. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-09 will have on the Company’s consolidated financial statements.  In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 addresses eight specific cash flow issues and intends to reduce the diversity in practice in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This guidance is effective for annual periods beginning after December 15, 2017, including interim periods within that reporting period. Early adoption is permitted. The Company is currently in the process of evaluating the impact the adoption of ASU 2016-15 will have on the Company’s consolidated statement of cash flows.

Significant Accounting Polici26

Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2016
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 
Mack Cali Realty LP [Member]
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 

Recent Transactions (Tables)

Recent Transactions (Tables)	9 Months Ended
	Sep. 30, 2016
Real Estate Properties [Line Items]
Schedule Of Properties Acquired	  Acquisition # of Rentable Acquisition  Date Property Address Location Bldgs. Square Feet Cost  04/04/16 11 Martine Avenue (a) White Plains, New York 1 82,000 $ 10,750  04/07/16 320, 321 University Avenue (b) Newark, New Jersey 2 147,406 23,000  06/02/16 101 Wood Avenue South (c) Edison, New Jersey 1 262,841 82,300  07/01/16 111 River Street (c) Hoboken, New Jersey 1 566,215 210,761   Total Acquisitions 5 1,058,462 $ 326,811   (a) Acquisition represented four units of condominium interests which collectively comprise floors 2 through 5. Upon completion of the acquisition, the Company owns the entire 14-story 262,000 square-foot building. The acquisition was funded using available cash.  (b) This acquisition was funded through borrowings under the Company’s unsecured revolving credit facility.  (c) This acquisition was funded using available cash and through borrowings under the Company’s unsecured revolving credit facility. 
Schedule Of Purchase Price Allocation	   320,321  11 Martine University 101 Wood 111 River  Avenue Avenue Avenue Street  Land and leasehold interest $ 2,460 $ 7,305 $ 8,509 $ 204  Buildings and improvements 8,290 15,695 72,738 198,609  Above market leases (a) - - 58 617  In-place lease values (a) - - 6,743 43,801  Other assets - - - 11,279  88,048 254,510  Less: Below market lease values (a) - - (5,748) (43,749)  Net assets recorded upon acquisition $ 10,750 $ 23,000 $ 82,300 $ 210,761  ( a ) Above market, in-pla ce and below market lease s will be amortized over a weighted-average term of 8.1 years .
Schedule Of Net Assets Recorded Upon Consolidation	   Overlook Portside  Ridge Apts  Land and leasehold interest $ 11,072 $ -  Buildings and improvements 87,793 73,713  Furniture, fixtures and equipment 1,695 1,038  Other assets 237 10,181  In-place lease values (a) 4,389 2,637  Less: Below market lease values (a) (489) (242)  Sub Total 104,697 87,327   Less: Debt assumed (52,662) (42,500)   Net assets recorded upon consolidation $ 52,035 $ 44,827  ( a ) In-place lease values and below - market lease values will be amortized over a weighted average term of 7 months .
Disposal Group, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Schedule Of Dispositions/Rental Property Held For Sale	  Realized  Gains  Net Net (losses)/  Disposition # of Sales Book Unrealized  Date Property/Address Location Bldgs. Proceeds Value Losses, net  03/11/16 2 Independence Way (a) Princeton, New Jersey 1 $ 4,119 $ 4,283 $ (164)  03/24/16 1201 Connecticut Avenue, NW Washington, D.C. 1 90,591 31,827 58,764  04/26/16 125 Broad Street (b) New York, New York 1 192,323 200,183 (7,860)  05/09/16 9200 Edmonston Road Greenbelt, Maryland 1 4,083 (c) 3,837 246  05/18/16 1400 L Street Washington, D.C. 1 68,399 (d) 30,053 38,346  07/14/16 600 Parsippany Road Parsippany, New Jersey 1 10,465 (e) 5,875 4,590  07/14/16 4,5,6 Century Drive (f) Parsippany, New Jersey 3 14,533 17,308 (2,775)  08/11/16 Andover Place Andover, Massachusetts 1 39,863 37,150 2,713  09/26/16 222,233 Mount Airy Road (g) Basking Ridge, New Jersey 2 8,817 9,039 (222)  09/27/16 10 Mountainview Road Upper Saddle River, New Jersey 1 18,990 19,571 (581)  Sub-total 13 452,183 359,126 93,057   Unrealized losses on rental property held for sale (24,393)  Totals 13 $ 452,183 $ 359,126 $ 68,664   (a) The Company recorded an impairment charge of $3.2 million on this property during the year ended December 31, 2015.  (b) The Company recorded impairment charges of $83.2 million on this property during the year ended December 31, 2015.  (c) The Company transferred the deed for this property to the lender in satisfaction of its obligations. The Company recorded an impairment charge of $3.0 million on this property during the year ended December 31, 2012.  (d) $28.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (e) $10.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (f) The Company recorded impairment charges of $9.8 million on these properties during the year ended December 31, 2015.  (g) The Company recorded impairment charges of $1 million on these properties during the year ended December 31, 2015.   
Summary Of Income (Loss) From Properties Disposed	   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Total revenues $ 1,854 $ 12,934 $ 20,048 $ 47,583  Operating and other expenses (1,709) (7,273) (13,374) (25,488)  Depreciation and amortization (2,979) (7,798) (11,590) (20,061)  Interest expense (625) (1,241) (2,011) (6,621)   Income (loss) from properties disposed of $ (3,459) $ (3,378) $ (6,927) $ (4,587)   Impairments - (61,891) - (61,891)  Realized gains/unrealized Losses on dispositions 7,340 18,718 93,057 53,261   Total income (loss) from properties disposed of $ 3,881 $ (46,551) $ 86,130 $ (13,217) 
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Summary Of Income From Property Held For Sale, Net	   September 30,  2016  Land $ 34,802  Buildings and improvements 165,231  Less: Accumulated depreciation (72,842)  Less: Unrealized losses on properties held for sale (24,393)  Rental property held for sale,net $ 102,798 
Mack Cali Realty LP [Member]
Real Estate Properties [Line Items]
Schedule Of Properties Acquired	  Acquisition # of Rentable Acquisition  Date Property Address Location Bldgs. Square Feet Cost  04/04/16 11 Martine Avenue (a) White Plains, New York 1 82,000 $ 10,750  04/07/16 320, 321 University Avenue (b) Newark, New Jersey 2 147,406 23,000  06/02/16 101 Wood Avenue South (c) Edison, New Jersey 1 262,841 82,300  07/01/16 111 River Street (c) Hoboken, New Jersey 1 566,215 210,761   Total Acquisitions 5 1,058,462 $ 326,811   (a) Acquisition represented four units of condominium interests which collectively comprise floors 2 through 5. Upon completion of the acquisition, the Company owns the entire 14-story 262,000 square-foot building. The acquisition was funded using available cash.  (b) This acquisition was funded through borrowings under the Company’s unsecured revolving credit facility.  (c) This acquisition was funded using available cash and through borrowings under the Company’s unsecured revolving credit facility. 
Schedule Of Purchase Price Allocation	   320,321  11 Martine University 101 Wood 111 River  Avenue Avenue Avenue Street  Land and leasehold interest $ 2,460 $ 7,305 $ 8,509 $ 204  Buildings and improvements 8,290 15,695 72,738 198,609  Above market leases (a) - - 58 617  In-place lease values (a) - - 6,743 43,801  Other assets - - - 11,279  88,048 254,510  Less: Below market lease values (a) - - (5,748) (43,749)  Net assets recorded upon acquisition $ 10,750 $ 23,000 $ 82,300 $ 210,761  ( a ) Above market, in-pla ce and below market lease s will be amortized over a weighted-average term of 8.1 years .
Schedule Of Net Assets Recorded Upon Consolidation	   Overlook Portside  Ridge Apts  Land and leasehold interest $ 11,072 $ -  Buildings and improvements 87,793 73,713  Furniture, fixtures and equipment 1,695 1,038  Other assets 237 10,181  In-place lease values (a) 4,389 2,637  Less: Below market lease values (a) (489) (242)  Sub Total 104,697 87,327   Less: Debt assumed (52,662) (42,500)   Net assets recorded upon consolidation $ 52,035 $ 44,827  ( a ) In-place lease values and below - market lease values will be amortized over a weighted average term of 7 months .
Mack Cali Realty LP [Member] | Disposal Group, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Schedule Of Dispositions/Rental Property Held For Sale	  Realized  Gains  Net Net (losses)/  Disposition # of Sales Book Unrealized  Date Property/Address Location Bldgs. Proceeds Value Losses, net  03/11/16 2 Independence Way (a) Princeton, New Jersey 1 $ 4,119 $ 4,283 $ (164)  03/24/16 1201 Connecticut Avenue, NW Washington, D.C. 1 90,591 31,827 58,764  04/26/16 125 Broad Street (b) New York, New York 1 192,323 200,183 (7,860)  05/09/16 9200 Edmonston Road Greenbelt, Maryland 1 4,083 (c) 3,837 246  05/18/16 1400 L Street Washington, D.C. 1 68,399 (d) 30,053 38,346  07/14/16 600 Parsippany Road Parsippany, New Jersey 1 10,465 (e) 5,875 4,590  07/14/16 4,5,6 Century Drive (f) Parsippany, New Jersey 3 14,533 17,308 (2,775)  08/11/16 Andover Place Andover, Massachusetts 1 39,863 37,150 2,713  09/26/16 222,233 Mount Airy Road (g) Basking Ridge, New Jersey 2 8,817 9,039 (222)  09/27/16 10 Mountainview Road Upper Saddle River, New Jersey 1 18,990 19,571 (581)  Sub-total 13 452,183 359,126 93,057   Unrealized losses on rental property held for sale (24,393)  Totals 13 $ 452,183 $ 359,126 $ 68,664   (a) The Company recorded an impairment charge of $3.2 million on this property during the year ended December 31, 2015.  (b) The Company recorded impairment charges of $83.2 million on this property during the year ended December 31, 2015.  (c) The Company transferred the deed for this property to the lender in satisfaction of its obligations. The Company recorded an impairment charge of $3.0 million on this property during the year ended December 31, 2012.  (d) $28.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (e) $10.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.  (f) The Company recorded impairment charges of $9.8 million on these properties during the year ended December 31, 2015.  (g) The Company recorded impairment charges of $1 million on these properties during the year ended December 31, 2015.   
Summary Of Income (Loss) From Properties Disposed	   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Total revenues $ 1,854 $ 12,934 $ 20,048 $ 47,583  Operating and other expenses (1,709) (7,273) (13,374) (25,488)  Depreciation and amortization (2,979) (7,798) (11,590) (20,061)  Interest expense (625) (1,241) (2,011) (6,621)   Income (loss) from properties disposed of $ (3,459) $ (3,378) $ (6,927) $ (4,587)   Impairments - (61,891) - (61,891)  Realized gains/unrealized Losses on dispositions 7,340 18,718 93,057 53,261   Total income (loss) from properties disposed of $ 3,881 $ (46,551) $ 86,130 $ (13,217) 
Mack Cali Realty LP [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Summary Of Income From Property Held For Sale, Net	   September 30,  2016  Land $ 34,802  Buildings and improvements 165,231  Less: Accumulated depreciation (72,842)  Less: Unrealized losses on properties held for sale (24,393)  Rental property held for sale,net $ 102,798 

Investments In Unconsolidated28

Investments In Unconsolidated Joint Ventures (Tables)	9 Months Ended
	Sep. 30, 2016
Summary Of Unconsolidated Joint Ventures	   Property Debt  Number of Company's Carrying Value As of September 30, 2016  Apartment Units Effective September 30, December 31, Maturity Interest  Entity / Property Name or Rentable Square Feet (sf) Ownership % (a) 2016 2015 Balance Date Rate  Multi-family  Marbella RoseGarden, L.L.C./ Marbella (b) 412 units 24.27 % $ 15,360 $ 15,569 $ 95,000 05/01/18 4.99 %  RoseGarden Monaco Holdings, L.L.C./ Monaco (b) 523 units 15.00 % 68 937 165,000 02/01/21 4.19 %  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (b) (c) 130 units 12.50 % 6,958 5,723 44,190 (d) (d)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (b) (e) 316 units 50.00 % 10,464 - 79,067 07/15/21 6.00 % (f)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) (b) 355 units 7.50 % - - 128,100 03/01/30 4.00 %  Crystal House Apartments Investors LLC / Crystal House (g) 794 units 25.00 % 30,493 28,114 165,000 04/01/20 3.17 %  Roseland/Port Imperial Partners, L.P./ Riverwalk C (b) (h) 363 units 20.00 % 1,678 1,678 - - -  RoseGarden Marbella South, L.L.C./ Marbella II 311 units 24.27 % 17,895 16,728 72,955 03/30/17 L+2.25 % (i)  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) (b) 227 units 7.50 % - - 81,900 03/01/30 4.00 %  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison 141 units 45.00 % 2,169 2,544 30,000 08/01/25 3.70 %  Capitol Place Mezz LLC / Station Townhouses 378 units 50.00 % 44,103 46,267 100,700 07/01/33 4.82 %  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside 763 units 85.00 % 99,358 96,799 142,746 08/01/29 5.197 % (j)  RoseGarden Monaco, L.L.C./ San Remo Land 250 potential units 41.67 % 1,385 1,339 - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing 850 potential units 50.00 % 337 337 - - -  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 160,000 sf 50.00 % 1,962 1,962 - - -  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 1,225,000 sf 50.00 % 4,311 4,055 - - -   Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 92,878 sf 50.00 % 4,204 4,140 14,626 05/17/17 L+3.00 %  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 139,750 sf 50.00 % 6,157 5,890 11,420 07/01/23 2.87 %  BNES Associates III / Offices at Crystal Lake 106,345 sf 31.25 % 2,695 2,295 5,646 11/01/23 4.76 %  KPG-P 100 IMW JV, LLC / 100 Independence Mall West 339,615 sf 33.33 % - - 72,000 09/08/18 L+5.95 % (k)  Keystone-Penn 1,842,820 sf (l) - - 235,124 (m) (m)  Keystone-TriState 1,266,384 sf (n) 2,771 3,958 218,321 (o) (o)  KPG-MCG Curtis JV, L.L.C./ Curtis Center (p) 885,000 sf 50.00 % 64,909 59,858 (q) (q) (q)   Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (b) 30,745 sf 20.00 % 1,719 1,758 - - -  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 350 rooms 50.00 % (r) (r) 100,000 10/01/26 3.668 %  Other (s) 811 3,506 - - -  Totals: $ 319,807 $ 303,457 $ 1,761,795       (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 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) Property debt balance consists of: (i) an amortizable loan, collateralized by the Metropolitan at 40 Park, with a balance of $37,836 , bears interest at 3.25 percent, matures in September 2020 ; (ii) an amortizable loan, collateralized by the Shops at 40 Park, with a balance of $6,354 , bears interest at 3.63 percent, matures in August 2018 .  (e) During the second quarter 2016, the Company acquired the equity interests of its joint venture partner in Portside Apartment Holdings, L.L.C and PruRose Riverwalk G, L.L.C. for $39.6 million and $11.3 million, respectively, which increased its ownership to 100 percent in Portside Apartment Holdings, LLC and 50 percent in Riverwalk G Urban Renewal, L.L.C. (See Note 3: Recent Transactions – Acquisitions).  (f) The loan was refinanced in October 2016. The new $82 million loan matures in October 2026 and has an interest rate of 3.21 percent.  (g) 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.  (h) The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J that can accommodate the development of 836 apartment units.  (i) 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.  (j) The construction/permanent loan has a maximum borrowing amount of $192,000 .  (k) The mortgage loan has three one -year extension options, subject to certain conditions.  (l) The Company’s equity interests in the joint ventures will be subordinated to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (m) Principal balance of $127,538 bears interest at 5.114 percent and matures on August 27, 2023 ; principal balance of $45,500 bears interest at 5.01 percent and matures on September 6, 2025 ; principal balance of $17,911 bears interest at 8.0 percent and matures on October 31, 2016 ; principal balance of $22,500 bears interest at LIBOR+5.2 percent t and matures on August 31, 2019 ; principal balance of $11,250 bears interest at LIBOR+5.5 percent and matures on January 9, 2019 ; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures on August 27, 2017 .  (n) Includes the Company’s pari-passu interests of $2.8 million in five properties and Company’s subordinated equity interests to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (o) Principal balance of $47,500 bears interest at 5.38 percent and matures on July 1, 2017 ; principal balance of $78,121 bears interest at rates ranging from 5.65 percent to 6.75 percent and matures on September 9, 2017 ; principal balance of $14,250 bears interest at 4.88 percent and matures on July 6, 2024 ; principal balance of $63,400 bears interest at 4.93 percent and matures on July 6, 2044 ; principal balance of $15,050 bears interest at 4.71 percent and matures on August 6, 2044 .  (p) Includes undivided interests in the same manner as investments in noncontrolling partnership, pursuant to ASC 970-323-25-12.  (q) See Note 10: Mortgages, Loans Payable and Other Obligations for debt secured by interests in these assets.  (r) The negative carrying value for this venture of $3,317 as of December 31, 2015, was included in accounts payable, accrued expenses and other liabilities.  (s) 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 Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures	   Three Months Ended Nine Months Ended  September 30, September 30,  Entity / Property Name 2016 2015 2016 2015  Multi-family  Marbella RoseGarden, L.L.C./ Marbella $ 76 $ 64 $ 208 $ 186  RoseGarden Monaco Holdings, L.L.C./ Monaco (277) (295) (869) (924)  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (76) (93) (239) (277)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (594) (151) (1,189) (681)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) - - - -  Crystal House Apartments Investors LLC / Crystal House (99) (44) (321) (41)  Roseland/Port Imperial Partners, L.P./ Riverwalk C (36) (85) (36) (394)  RoseGarden Marbella South, L.L.C./ Marbella II 105 - (202) -  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) - - - -  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison (43) (54) (173) (377)  Capitol Place Mezz LLC / Station Townhouses (500) (1,454) (1,995) (2,642)  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (42) - (60) -  RoseGarden Monaco, L.L.C./ San Remo Land - - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing - (12) (60) (32)  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 (22) - (53) (5)  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 81 102 256 258  Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 111 110 321 332  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 74 38 266 110  BNES Associates III / Offices at Crystal Lake 109 13 (68) 133  KPG-P 100 IMW JV, LLC / 100 Independence Mall West - (37) - (800)  Keystone-Penn 150 3,663 450 3,663  Keystone-TriState (518) (173) (1,186) (1,763)  KPG-MCG Curtis JV, L.L.C./ Curtis Center 113 327 518 755  Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (14) (17) (39) (52)  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 22,447 1,151 23,267 1,934  Other 745 82 826 (2,106)  Company's equity in earnings (loss) of unconsolidated joint ventures $ 21,790 $ 3,135 $ 19,622 $ (2,723) 
Summary Of Financial Position Of Unconsolidated Joint Ventures	 September 30, 2016   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 41,161 $ 1,684,502 $ 1,725,663  Other assets 17,959 250,274 268,233  Total assets $ 59,120 $ 1,934,776 $ 1,993,896  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 100,000 $ 1,235,918 $ 1,335,918  Other liabilities 4,985 226,086 231,071  Partners'/members' capital (45,865) 472,772 426,907  Total liabilities and  partners'/members' capital $ 59,120 $ 1,934,776 $ 1,993,896  Company's net investment  in unconsolidated  joint ventures $ - $ 319,807 $ 319,807       December 31, 2015   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 44,925 $ 1,736,696 $ 1,781,621  Other assets 15,249 291,751 307,000  Total assets $ 60,174 $ 2,028,447 $ 2,088,621  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 63,741 $ 1,234,552 $ 1,298,293  Other liabilities 5,481 210,470 215,951  Partners'/members' capital (9,048) 583,425 574,377  Total liabilities and  partners'/members' capital $ 60,174 $ 2,028,447 $ 2,088,621  Company's net investment  in unconsolidated  joint ventures $ - $ 303,457 $ 303,457  
Summary Of Results Of Operations Of Unconsolidated Joint Ventures	  Three Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 11,262 $ 78,808 $ 90,070  Operating and other expenses (7,248) (56,411) (63,659)  Depreciation and amortization (1,499) (14,825) (16,324)  Interest expense (1,036) (12,236) (13,272)  Net income $ 1,479 $ (4,664) $ (3,185)  Company's equity in earnings  of unconsolidated  joint ventures $ 22,447 $ (657) $ 21,790    Three Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 12,390 $ 70,196 $ 82,586  Operating and other expenses (7,580) (48,389) (55,969)  Depreciation and amortization (1,501) (15,322) (16,823)  Interest expense (1,008) (13,614) (14,622)  Net income $ 2,301 $ (7,129) $ (4,828)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,151 $ 1,984 $ 3,135       Nine Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 30,973 $ 223,412 $ 254,385  Operating and other expenses (20,356) (154,320) (174,676)  Depreciation and amortization (4,478) (47,612) (52,090)  Interest expense (3,020) (37,716) (40,736)  Net income $ 3,119 $ (16,236) $ (13,117)  Company's equity in earnings  of unconsolidated  joint ventures $ 23,267 $ (3,645) $ 19,622       Nine Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 31,815 $ 206,323 $ 238,138  Operating and other expenses (20,306) (148,972) (169,278)  Depreciation and amortization (4,589) (47,043) (51,632)  Interest expense (3,051) (36,229) (39,280)  Net income $ 3,869 $ (25,921) $ (22,052)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,934 $ (4,657) $ (2,723)  
Mack Cali Realty LP [Member]
Summary Of Unconsolidated Joint Ventures	   Property Debt  Number of Company's Carrying Value As of September 30, 2016  Apartment Units Effective September 30, December 31, Maturity Interest  Entity / Property Name or Rentable Square Feet (sf) Ownership % (a) 2016 2015 Balance Date Rate  Multi-family  Marbella RoseGarden, L.L.C./ Marbella (b) 412 units 24.27 % $ 15,360 $ 15,569 $ 95,000 05/01/18 4.99 %  RoseGarden Monaco Holdings, L.L.C./ Monaco (b) 523 units 15.00 % 68 937 165,000 02/01/21 4.19 %  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (b) (c) 130 units 12.50 % 6,958 5,723 44,190 (d) (d)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (b) (e) 316 units 50.00 % 10,464 - 79,067 07/15/21 6.00 % (f)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) (b) 355 units 7.50 % - - 128,100 03/01/30 4.00 %  Crystal House Apartments Investors LLC / Crystal House (g) 794 units 25.00 % 30,493 28,114 165,000 04/01/20 3.17 %  Roseland/Port Imperial Partners, L.P./ Riverwalk C (b) (h) 363 units 20.00 % 1,678 1,678 - - -  RoseGarden Marbella South, L.L.C./ Marbella II 311 units 24.27 % 17,895 16,728 72,955 03/30/17 L+2.25 % (i)  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) (b) 227 units 7.50 % - - 81,900 03/01/30 4.00 %  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison 141 units 45.00 % 2,169 2,544 30,000 08/01/25 3.70 %  Capitol Place Mezz LLC / Station Townhouses 378 units 50.00 % 44,103 46,267 100,700 07/01/33 4.82 %  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside 763 units 85.00 % 99,358 96,799 142,746 08/01/29 5.197 % (j)  RoseGarden Monaco, L.L.C./ San Remo Land 250 potential units 41.67 % 1,385 1,339 - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing 850 potential units 50.00 % 337 337 - - -  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 160,000 sf 50.00 % 1,962 1,962 - - -  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 1,225,000 sf 50.00 % 4,311 4,055 - - -   Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 92,878 sf 50.00 % 4,204 4,140 14,626 05/17/17 L+3.00 %  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 139,750 sf 50.00 % 6,157 5,890 11,420 07/01/23 2.87 %  BNES Associates III / Offices at Crystal Lake 106,345 sf 31.25 % 2,695 2,295 5,646 11/01/23 4.76 %  KPG-P 100 IMW JV, LLC / 100 Independence Mall West 339,615 sf 33.33 % - - 72,000 09/08/18 L+5.95 % (k)  Keystone-Penn 1,842,820 sf (l) - - 235,124 (m) (m)  Keystone-TriState 1,266,384 sf (n) 2,771 3,958 218,321 (o) (o)  KPG-MCG Curtis JV, L.L.C./ Curtis Center (p) 885,000 sf 50.00 % 64,909 59,858 (q) (q) (q)   Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (b) 30,745 sf 20.00 % 1,719 1,758 - - -  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 350 rooms 50.00 % (r) (r) 100,000 10/01/26 3.668 %  Other (s) 811 3,506 - - -  Totals: $ 319,807 $ 303,457 $ 1,761,795       (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 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) Property debt balance consists of: (i) an amortizable loan, collateralized by the Metropolitan at 40 Park, with a balance of $37,836 , bears interest at 3.25 percent, matures in September 2020 ; (ii) an amortizable loan, collateralized by the Shops at 40 Park, with a balance of $6,354 , bears interest at 3.63 percent, matures in August 2018 .  (e) During the second quarter 2016, the Company acquired the equity interests of its joint venture partner in Portside Apartment Holdings, L.L.C and PruRose Riverwalk G, L.L.C. for $39.6 million and $11.3 million, respectively, which increased its ownership to 100 percent in Portside Apartment Holdings, LLC and 50 percent in Riverwalk G Urban Renewal, L.L.C. (See Note 3: Recent Transactions – Acquisitions).  (f) The loan was refinanced in October 2016. The new $82 million loan matures in October 2026 and has an interest rate of 3.21 percent.  (g) 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.  (h) The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J that can accommodate the development of 836 apartment units.  (i) 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.  (j) The construction/permanent loan has a maximum borrowing amount of $192,000 .  (k) The mortgage loan has three one -year extension options, subject to certain conditions.  (l) The Company’s equity interests in the joint ventures will be subordinated to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (m) Principal balance of $127,538 bears interest at 5.114 percent and matures on August 27, 2023 ; principal balance of $45,500 bears interest at 5.01 percent and matures on September 6, 2025 ; principal balance of $17,911 bears interest at 8.0 percent and matures on October 31, 2016 ; principal balance of $22,500 bears interest at LIBOR+5.2 percent t and matures on August 31, 2019 ; principal balance of $11,250 bears interest at LIBOR+5.5 percent and matures on January 9, 2019 ; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures on August 27, 2017 .  (n) Includes the Company’s pari-passu interests of $2.8 million in five properties and Company’s subordinated equity interests to Keystone Entities receiving a 15 percent internal rate of return (“IRR”) after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.  (o) Principal balance of $47,500 bears interest at 5.38 percent and matures on July 1, 2017 ; principal balance of $78,121 bears interest at rates ranging from 5.65 percent to 6.75 percent and matures on September 9, 2017 ; principal balance of $14,250 bears interest at 4.88 percent and matures on July 6, 2024 ; principal balance of $63,400 bears interest at 4.93 percent and matures on July 6, 2044 ; principal balance of $15,050 bears interest at 4.71 percent and matures on August 6, 2044 .  (p) Includes undivided interests in the same manner as investments in noncontrolling partnership, pursuant to ASC 970-323-25-12.  (q) See Note 10: Mortgages, Loans Payable and Other Obligations for debt secured by interests in these assets.  (r) The negative carrying value for this venture of $3,317 as of December 31, 2015, was included in accounts payable, accrued expenses and other liabilities.  (s) 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 Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures	   Three Months Ended Nine Months Ended  September 30, September 30,  Entity / Property Name 2016 2015 2016 2015  Multi-family  Marbella RoseGarden, L.L.C./ Marbella $ 76 $ 64 $ 208 $ 186  RoseGarden Monaco Holdings, L.L.C./ Monaco (277) (295) (869) (924)  Rosewood Morristown, L.L.C. / Metropolitan at 40 Park (76) (93) (239) (277)  Riverwalk G Urban Renewal, L.L.C./ RiverTrace at Port Imperial (594) (151) (1,189) (681)  Elmajo Urban Renewal Associates, LLC / Lincoln Harbor (Bldg A&C) - - - -  Crystal House Apartments Investors LLC / Crystal House (99) (44) (321) (41)  Roseland/Port Imperial Partners, L.P./ Riverwalk C (36) (85) (36) (394)  RoseGarden Marbella South, L.L.C./ Marbella II 105 - (202) -  Estuary Urban Renewal Unit B, LLC / Lincoln Harbor (Bldg B) - - - -  Riverpark at Harrison I, L.L.C./ Riverpark at Harrison (43) (54) (173) (377)  Capitol Place Mezz LLC / Station Townhouses (500) (1,454) (1,995) (2,642)  Harborside Unit A Urban Renewal, L.L.C. / URL Harborside (42) - (60) -  RoseGarden Monaco, L.L.C./ San Remo Land - - - -  Grand Jersey Waterfront URA, L.L.C./ Liberty Landing - (12) (60) (32)  Hillsborough 206 Holdings, L.L.C./ Hillsborough 206 (22) - (53) (5)  Plaza VIII & IX Associates, L.L.C./ Vacant land (parking operations) 81 102 256 258  Office  Red Bank Corporate Plaza, L.L.C./ Red Bank 111 110 321 332  12 Vreeland Associates, L.L.C./ 12 Vreeland Road 74 38 266 110  BNES Associates III / Offices at Crystal Lake 109 13 (68) 133  KPG-P 100 IMW JV, LLC / 100 Independence Mall West - (37) - (800)  Keystone-Penn 150 3,663 450 3,663  Keystone-TriState (518) (173) (1,186) (1,763)  KPG-MCG Curtis JV, L.L.C./ Curtis Center 113 327 518 755  Other  Roseland/North Retail, L.L.C./ Riverwalk at Port Imperial (14) (17) (39) (52)  South Pier at Harborside / Hyatt Regency Jersey City on the Hudson 22,447 1,151 23,267 1,934  Other 745 82 826 (2,106)  Company's equity in earnings (loss) of unconsolidated joint ventures $ 21,790 $ 3,135 $ 19,622 $ (2,723) 
Summary Of Financial Position Of Unconsolidated Joint Ventures	 September 30, 2016   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 41,161 $ 1,684,502 $ 1,725,663  Other assets 17,959 250,274 268,233  Total assets $ 59,120 $ 1,934,776 $ 1,993,896  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 100,000 $ 1,235,918 $ 1,335,918  Other liabilities 4,985 226,086 231,071  Partners'/members' capital (45,865) 472,772 426,907  Total liabilities and  partners'/members' capital $ 59,120 $ 1,934,776 $ 1,993,896  Company's net investment  in unconsolidated  joint ventures $ - $ 319,807 $ 319,807       December 31, 2015   Harborside Combined  South Pier Other JV's Total  Assets:  Rental property, net $ 44,925 $ 1,736,696 $ 1,781,621  Other assets 15,249 291,751 307,000  Total assets $ 60,174 $ 2,028,447 $ 2,088,621  Liabilities and partners'  members' capital:  Mortgages and loans payable $ 63,741 $ 1,234,552 $ 1,298,293  Other liabilities 5,481 210,470 215,951  Partners'/members' capital (9,048) 583,425 574,377  Total liabilities and  partners'/members' capital $ 60,174 $ 2,028,447 $ 2,088,621  Company's net investment  in unconsolidated  joint ventures $ - $ 303,457 $ 303,457  
Summary Of Results Of Operations Of Unconsolidated Joint Ventures	  Three Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 11,262 $ 78,808 $ 90,070  Operating and other expenses (7,248) (56,411) (63,659)  Depreciation and amortization (1,499) (14,825) (16,324)  Interest expense (1,036) (12,236) (13,272)  Net income $ 1,479 $ (4,664) $ (3,185)  Company's equity in earnings  of unconsolidated  joint ventures $ 22,447 $ (657) $ 21,790    Three Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 12,390 $ 70,196 $ 82,586  Operating and other expenses (7,580) (48,389) (55,969)  Depreciation and amortization (1,501) (15,322) (16,823)  Interest expense (1,008) (13,614) (14,622)  Net income $ 2,301 $ (7,129) $ (4,828)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,151 $ 1,984 $ 3,135       Nine Months Ended September 30, 2016   Harborside Combined  South Pier Other JV's Total  Total revenues $ 30,973 $ 223,412 $ 254,385  Operating and other expenses (20,356) (154,320) (174,676)  Depreciation and amortization (4,478) (47,612) (52,090)  Interest expense (3,020) (37,716) (40,736)  Net income $ 3,119 $ (16,236) $ (13,117)  Company's equity in earnings  of unconsolidated  joint ventures $ 23,267 $ (3,645) $ 19,622       Nine Months Ended September 30, 2015   Harborside Combined  South Pier Other JV's Total  Total revenues $ 31,815 $ 206,323 $ 238,138  Operating and other expenses (20,306) (148,972) (169,278)  Depreciation and amortization (4,589) (47,043) (51,632)  Interest expense (3,051) (36,229) (39,280)  Net income $ 3,869 $ (25,921) $ (22,052)  Company's equity in earnings  of unconsolidated  joint ventures $ 1,934 $ (4,657) $ (2,723)  

Deferred Charges, Goodwill An29

Deferred Charges, Goodwill And Other Assets, Net (Tables)	9 Months Ended
	Sep. 30, 2016
Deferred Charges, Goodwill And Other Assets [Line Items]
Schedule Of Deferred Charges, Goodwill And Other Assets	   September 30, December 31,  (dollars in thousands) 2016 2015  Deferred leasing costs $ 230,718 $ 239,690  Deferred financing costs - revolving credit facility (a) 5,359 5,394  236,077 245,084  Accumulated amortization (107,982) (118,014)  Deferred charges, net 128,095 127,070  Notes receivable (b) 13,313 13,496  In-place lease values, related intangibles and other assets, net 77,656 10,931  Goodwill (c) 2,945 2,945  Prepaid expenses and other assets, net (d) 81,645 49,408   Total deferred charges, goodwill and other assets, net $ 303,654 $ 203,850  (a) Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the revolving credit facility) are classified to net against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies – Deferred Financing Costs. (b) Includes as of September 30, 2016 : a mortgage receivable for $ 10.4 million which bears interest at LIBOR plus six percent and matures in August 2017 ; and an interest-free note receivable with a net present value of $ 2.9 million and matures in April 2023 . The Company believes these balances are fully collectible. (c) All goodwill is attributable to the Company’s Multi-family Services segment. (d) Includes as of September 30, 2016 , $39.0 million of proceeds from property sales held by a qualified intermediary.
Schedule Of Fair Value Of The Derivative Financial Instruments	   Fair Value  Liability Derivatives designated September 30, December 31,  as hedging instruments 2016 2015 Balance sheet location  Interest rate swaps $ 7,528 $ - Accounts payable, accrued expenses and other liabilities   Asset Derivatives not designated  as hedging instruments  Interest rate caps $ - $ 2 Deferred charges, goodwill and other assets 
Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement	   Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion, Reclassification for Forecasted Transactions No Longer Probable of Occurring and Amount Excluded from Effectiveness Testing)  2016 2015 2016 2015 2016 2015  Three months ended September 30,   Interest rate swaps $ 866 $ - Interest expense $ 860 $ - Interest and other investment income (loss) $ 1,012 $ -   Nine months ended September 30,   Interest rate swaps $ (10,128) $ - Interest expense $ 2,600 $ - Interest and other investment income (loss) $ - $ - 
Mack Cali Realty LP [Member]
Deferred Charges, Goodwill And Other Assets [Line Items]
Schedule Of Deferred Charges, Goodwill And Other Assets	   September 30, December 31,  (dollars in thousands) 2016 2015  Deferred leasing costs $ 230,718 $ 239,690  Deferred financing costs - revolving credit facility (a) 5,359 5,394  236,077 245,084  Accumulated amortization (107,982) (118,014)  Deferred charges, net 128,095 127,070  Notes receivable (b) 13,313 13,496  In-place lease values, related intangibles and other assets, net 77,656 10,931  Goodwill (c) 2,945 2,945  Prepaid expenses and other assets, net (d) 81,645 49,408   Total deferred charges, goodwill and other assets, net $ 303,654 $ 203,850  (a) Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the revolving credit facility) are classified to net against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies – Deferred Financing Costs. (b) Includes as of September 30, 2016 : a mortgage receivable for $ 10.4 million which bears interest at LIBOR plus six percent and matures in August 2017 ; and an interest-free note receivable with a net present value of $ 2.9 million and matures in April 2023 . The Company believes these balances are fully collectible. (c) All goodwill is attributable to the Company’s Multi-family Services segment. (d) Includes as of September 30, 2016 , $39.0 million of proceeds from property sales held by a qualified intermediary.
Schedule Of Fair Value Of The Derivative Financial Instruments	   Fair Value  Liability Derivatives designated September 30, December 31,  as hedging instruments 2016 2015 Balance sheet location  Interest rate swaps $ 7,528 $ - Accounts payable, accrued expenses and other liabilities   Asset Derivatives not designated  as hedging instruments  Interest rate caps $ - $ 2 Deferred charges, goodwill and other assets 
Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement	   Derivatives in Cash Flow Hedging Relationships Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing) Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion, Reclassification for Forecasted Transactions No Longer Probable of Occurring and Amount Excluded from Effectiveness Testing)  2016 2015 2016 2015 2016 2015  Three months ended September 30,   Interest rate swaps $ 866 $ - Interest expense $ 860 $ - Interest and other investment income (loss) $ 1,012 $ -   Nine months ended September 30,   Interest rate swaps $ (10,128) $ - Interest expense $ 2,600 $ - Interest and other investment income (loss) $ - $ - 

Restricted Cash (Tables)

Restricted Cash (Tables)	9 Months Ended
	Sep. 30, 2016
Schedule Of Restricted Cash	   September 30, December 31,  2016 2015  Security deposits $ 8,872 $ 7,785  Escrow and other reserve funds 45,912 27,558   Total restricted cash $ 54,784 $ 35,343 
Mack Cali Realty LP [Member]
Schedule Of Restricted Cash	   September 30, December 31,  2016 2015  Security deposits $ 8,872 $ 7,785  Escrow and other reserve funds 45,912 27,558   Total restricted cash $ 54,784 $ 35,343 

Senior Unsecured Notes (Tables)

Senior Unsecured Notes (Tables) - Unsecured Note [Member]	9 Months Ended
	Sep. 30, 2016
Debt Instrument [Line Items]
Summary Of Senior Unsecured Notes	    September 30, December 31, Effective  2016 2015 Rate (1)  5.800% Senior Unsecured Notes, due January 15, 2016 (2) - $ 200,000 5.806 %  2.500% Senior Unsecured Notes, due December 15, 2017 $ 250,000 250,000 2.803 %  7.750% Senior Unsecured Notes, due August 15, 2019 (3) 135,136 250,000 8.017 %  4.500% Senior Unsecured Notes, due April 18, 2022 300,000 300,000 4.612 %  3.150% Senior Unsecured Notes, due May 15, 2023 275,000 275,000 3.517 %  Principal balance outstanding 960,136 1,275,000  Adjustment for unamortized debt discount (5,013) (6,156)  Unamortized deferred financing costs (3,848) (5,062)   Total senior unsecured notes, net $ 951,275 $ 1,263,782  (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 January 15, 2016, the Company repaid these notes at their maturity using proceeds from a new unsecured term loan and borrowings under the Company’s unsecured revolving credit facility. (3) On September 19, 2016, the Company purchased $114.9 million principal amount of these notes pursuant to its tender offer. See summary above. 
Mack Cali Realty LP [Member]
Debt Instrument [Line Items]
Summary Of Senior Unsecured Notes	    September 30, December 31, Effective  2016 2015 Rate (1)  5.800% Senior Unsecured Notes, due January 15, 2016 (2) - $ 200,000 5.806 %  2.500% Senior Unsecured Notes, due December 15, 2017 $ 250,000 250,000 2.803 %  7.750% Senior Unsecured Notes, due August 15, 2019 (3) 135,136 250,000 8.017 %  4.500% Senior Unsecured Notes, due April 18, 2022 300,000 300,000 4.612 %  3.150% Senior Unsecured Notes, due May 15, 2023 275,000 275,000 3.517 %  Principal balance outstanding 960,136 1,275,000  Adjustment for unamortized debt discount (5,013) (6,156)  Unamortized deferred financing costs (3,848) (5,062)   Total senior unsecured notes, net $ 951,275 $ 1,263,782  (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 January 15, 2016, the Company repaid these notes at their maturity using proceeds from a new unsecured term loan and borrowings under the Company’s unsecured revolving credit facility. (3) On September 19, 2016, the Company purchased $114.9 million principal amount of these notes pursuant to its tender offer. See summary above. 

Unsecured Term Loan (Tables)

Unsecured Term Loan (Tables) - Unsecured Term Loan [Member]	9 Months Ended
	Sep. 30, 2016
Debt Instrument [Line Items]
Schedule Of Interest Rate On Outstanding Borrowings Payable	   Operating Partnership's Interest Rate -  Unsecured Debt Ratings: Applicable Basis Points  Higher of S&P or Moody's Above LIBOR  No ratings or less than BBB-/Baa3 185.0  BBB- or Baa3 (current interest rate based on Company's election) 140.0  BBB or Baa2 115.0  BBB+ or Baa1 100.0  A- or A3 or higher 90.0 
Schedule Of Defined Leverage Ratio	   Interest Rate -  Applicable Basis  Total Leverage Ratio Points above LIBOR  < 45% 145  ≥ 45% and < 50% (current ratio) 155  ≥ 50% and < 55% 165  ≥ 55% 195 
Mack Cali Realty LP [Member]
Debt Instrument [Line Items]
Schedule Of Interest Rate On Outstanding Borrowings Payable	   Operating Partnership's Interest Rate -  Unsecured Debt Ratings: Applicable Basis Points  Higher of S&P or Moody's Above LIBOR  No ratings or less than BBB-/Baa3 185.0  BBB- or Baa3 (current interest rate based on Company's election) 140.0  BBB or Baa2 115.0  BBB+ or Baa1 100.0  A- or A3 or higher 90.0 
Schedule Of Defined Leverage Ratio	   Interest Rate -  Applicable Basis  Total Leverage Ratio Points above LIBOR  < 45% 145  ≥ 45% and < 50% (current ratio) 155  ≥ 50% and < 55% 165  ≥ 55% 195 

Unsecured Revolving Credit Fa33

Unsecured Revolving Credit Facility (Tables) - Unsecured Revolving Credit Facility [Member]	9 Months Ended
	Sep. 30, 2016
Debt Instrument [Line Items]
Schedule Of Unsecured Credit Rating And Facility Fee	   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 (current) 130.0 30.0  BBB or Baa2 110.0 20.0  BBB+ or Baa1 100.0 15.0  A- or A3 or higher 92.5 12.5 
Mack Cali Realty LP [Member]
Debt Instrument [Line Items]
Schedule Of Unsecured Credit Rating And Facility Fee	   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 (current) 130.0 30.0  BBB or Baa2 110.0 20.0  BBB+ or Baa1 100.0 15.0  A- or A3 or higher 92.5 12.5 

Mortgages, Loans Payable And 34

Mortgages, Loans Payable And Other Obligations (Tables) - Secured Debt [Member]	9 Months Ended
	Sep. 30, 2016
Debt Instrument [Line Items]
Summary Of Mortgages, Loans Payable And Other Obligations	   Effective September 30, December 31,  Property/Project Name Lender Rate (a) 2016 2015 Maturity  Port Imperial South (b) Wells Fargo Bank N.A. LIBOR+1.75 % - $ 34,962 -  6 Becker, 85 Livingston,  75 Livingston & 20 Waterview (c) Wells Fargo CMBS 10.260 % - 63,279 -  9200 Edmonston Road (d) Principal Commercial Funding L.L.C. 9.780 % - 3,793 -  4 Becker Wells Fargo CMBS 11.260 % $ 40,180 40,631 05/11/16 (e)  Various (f) Prudential Insurance 6.332 % 141,894 143,513 01/15/17  150 Main St. (g) Webster Bank LIBOR+2.35 % 25,159 10,937 03/30/17  Curtis Center (h) CCRE & PREFG LIBOR+5.912 % (i) 75,000 64,000 10/09/17  23 Main Street JPMorgan CMBS 5.587 % 28,020 28,541 09/01/18  Port Imperial 4/5 Hotel (j) Fifth Third Bank & Santander LIBOR+4.50 % 8,311 - 10/06/18  Harborside Plaza 5 The Northwestern Mutual Life 6.842 % 214,690 217,736 11/01/18  Insurance Co. & New York Life  Insurance Co.  Chase II (k) Fifth Third Bank LIBOR+2.25 % 23,599 - 12/15/18  100 Walnut Avenue Guardian Life Insurance Co. 7.311 % 18,058 18,273 02/01/19  One River Center (l) Guardian Life Insurance Co. 7.311 % 41,367 41,859 02/01/19  Park Square Wells Fargo Bank N.A. LIBOR+1.872 % (m) 27,500 27,500 04/10/19  Port Imperial South 11 (n) JPMorgan Chase LIBOR+2.35 % 7,136 - 11/24/19  Port Imperial South 4/5 Retail American General Life & A/G PC 4.559 % 4,000 4,000 12/01/21  The Chase at Overlook Ridge New York Community Bank 3.740 % 72,500 - 02/01/23  Portside 7 (o) CBRE Capital Markets/ 3.569 % 58,998 - 08/01/23  FreddieMac  101 Hudson (p) Wells Fargo CMBS 3.197 % (q) 250,000 - 10/11/26  Port Imperial South 4/5 Garage American General Life & A/G PC 4.853 % 32,600 32,600 12/01/29   Principal balance outstanding 1,069,012 731,624  Adjustment for unamortized debt discount - (548)  Unamortized deferred financing costs (7,808) (4,465)   Total mortgages, loans payable and other obligations, net $ 1,061,204 $ 726,611           (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 January 19, 2016, the loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.  (c) On April 22, 2016, the loan was repaid at a discount for $51.5 million, using borrowings from the Company's revolving credit facility. Accordingly, the Company recognized a gain on extinguishment of debt of $12.4 million, which is included in loss on extinguishment of debt, net.  (d) On May 5, 2016, the Company transferred the deed for 9200 Edmonston Road to the lender in satisfaction of its obligations and recorded a gain of $0.2 million.  (e) The Company has begun discussions with the lender regarding the past due maturity of the loan.  (f) Mortgage is cross collateralized by seven properties. The Company has agreed, subject to certain conditions, to guarantee repayment of $61.1 million of the loan.  (g) This construction loan has a maximum borrowing capacity of $28.8 million.  (h) The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company’s $75 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.8191 percent at September 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.025 percent at September 30, 2016. The senior loan rate is based on a floating rate of one -month LIBOR plus 329 basis points and the mezzanine loan rate is based on a floating rate of one -month LIBOR plus 950 basis points. The Company has entered into LIBOR caps for the periods of the loans. In October 2016, the first of three one -year extension options was exercised by the venture.  (i) The effective interest rate includes amortization of deferred financing costs of 1.362 percent.  (j) This construction loan has a maximum borrowing capacity of $94 million.  (k) This construction loan has a maximum borrowing capacity of $48 million.  (l) Mortgage is collateralized by the three properties comprising One River Center.  (m) The effective interest rate includes amortization of deferred financing costs of 0.122 percent.  (n) This constuction loan has a maximum borrowing capacity of $78 million.  (o) This mortgage loan was obtained by the Company in July 2016 to replace a $42.5 million mortgage loan that was in place at the property acquisition date of April 1, 2016.  (p) This mortgage loan was obtained by the Company on September 30, 2016. $19.2 million of the mortgage loan principal was placed in escrow accounts directly by the lender at the loan closing.  (q) The effective interest rate includes amortization of deferred financing costs of 0.0798 percent.
Mack Cali Realty LP [Member]
Debt Instrument [Line Items]
Summary Of Mortgages, Loans Payable And Other Obligations	   Effective September 30, December 31,  Property/Project Name Lender Rate (a) 2016 2015 Maturity  Port Imperial South (b) Wells Fargo Bank N.A. LIBOR+1.75 % - $ 34,962 -  6 Becker, 85 Livingston,  75 Livingston & 20 Waterview (c) Wells Fargo CMBS 10.260 % - 63,279 -  9200 Edmonston Road (d) Principal Commercial Funding L.L.C. 9.780 % - 3,793 -  4 Becker Wells Fargo CMBS 11.260 % $ 40,180 40,631 05/11/16 (e)  Various (f) Prudential Insurance 6.332 % 141,894 143,513 01/15/17  150 Main St. (g) Webster Bank LIBOR+2.35 % 25,159 10,937 03/30/17  Curtis Center (h) CCRE & PREFG LIBOR+5.912 % (i) 75,000 64,000 10/09/17  23 Main Street JPMorgan CMBS 5.587 % 28,020 28,541 09/01/18  Port Imperial 4/5 Hotel (j) Fifth Third Bank & Santander LIBOR+4.50 % 8,311 - 10/06/18  Harborside Plaza 5 The Northwestern Mutual Life 6.842 % 214,690 217,736 11/01/18  Insurance Co. & New York Life  Insurance Co.  Chase II (k) Fifth Third Bank LIBOR+2.25 % 23,599 - 12/15/18  100 Walnut Avenue Guardian Life Insurance Co. 7.311 % 18,058 18,273 02/01/19  One River Center (l) Guardian Life Insurance Co. 7.311 % 41,367 41,859 02/01/19  Park Square Wells Fargo Bank N.A. LIBOR+1.872 % (m) 27,500 27,500 04/10/19  Port Imperial South 11 (n) JPMorgan Chase LIBOR+2.35 % 7,136 - 11/24/19  Port Imperial South 4/5 Retail American General Life & A/G PC 4.559 % 4,000 4,000 12/01/21  The Chase at Overlook Ridge New York Community Bank 3.740 % 72,500 - 02/01/23  Portside 7 (o) CBRE Capital Markets/ 3.569 % 58,998 - 08/01/23  FreddieMac  101 Hudson (p) Wells Fargo CMBS 3.197 % (q) 250,000 - 10/11/26  Port Imperial South 4/5 Garage American General Life & A/G PC 4.853 % 32,600 32,600 12/01/29   Principal balance outstanding 1,069,012 731,624  Adjustment for unamortized debt discount - (548)  Unamortized deferred financing costs (7,808) (4,465)   Total mortgages, loans payable and other obligations, net $ 1,061,204 $ 726,611           (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 January 19, 2016, the loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.  (c) On April 22, 2016, the loan was repaid at a discount for $51.5 million, using borrowings from the Company's revolving credit facility. Accordingly, the Company recognized a gain on extinguishment of debt of $12.4 million, which is included in loss on extinguishment of debt, net.  (d) On May 5, 2016, the Company transferred the deed for 9200 Edmonston Road to the lender in satisfaction of its obligations and recorded a gain of $0.2 million.  (e) The Company has begun discussions with the lender regarding the past due maturity of the loan.  (f) Mortgage is cross collateralized by seven properties. The Company has agreed, subject to certain conditions, to guarantee repayment of $61.1 million of the loan.  (g) This construction loan has a maximum borrowing capacity of $28.8 million.  (h) The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company’s $75 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.8191 percent at September 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.025 percent at September 30, 2016. The senior loan rate is based on a floating rate of one -month LIBOR plus 329 basis points and the mezzanine loan rate is based on a floating rate of one -month LIBOR plus 950 basis points. The Company has entered into LIBOR caps for the periods of the loans. In October 2016, the first of three one -year extension options was exercised by the venture.  (i) The effective interest rate includes amortization of deferred financing costs of 1.362 percent.  (j) This construction loan has a maximum borrowing capacity of $94 million.  (k) This construction loan has a maximum borrowing capacity of $48 million.  (l) Mortgage is collateralized by the three properties comprising One River Center.  (m) The effective interest rate includes amortization of deferred financing costs of 0.122 percent.  (n) This constuction loan has a maximum borrowing capacity of $78 million.  (o) This mortgage loan was obtained by the Company in July 2016 to replace a $42.5 million mortgage loan that was in place at the property acquisition date of April 1, 2016.  (p) This mortgage loan was obtained by the Company on September 30, 2016. $19.2 million of the mortgage loan principal was placed in escrow accounts directly by the lender at the loan closing.  (q) The effective interest rate includes amortization of deferred financing costs of 0.0798 percent.

Disclosure Of Fair Value Of A35

Disclosure Of Fair Value Of Assets And Liabilities (Tables)	9 Months Ended
	Sep. 30, 2016
Schedule Of Valuation Techniques And Significant Unobservable Inputs	   Fair Value at Primary  September 30, Valuation Unobservable Location Range of  Description 2015 Techniques Inputs Type Rates  Properties held and used on which the Company recognized impairment losses $ 438,606,000 Discounted cash flows Discount rate Suburban 8% - 15%  Central Business District 6% - 8%   Exit Capitalization rate Suburban 7.5% - 9%  Central Business District 4.6% - 5.75%  
Mack Cali Realty LP [Member]
Schedule Of Valuation Techniques And Significant Unobservable Inputs	   Fair Value at Primary  September 30, Valuation Unobservable Location Range of  Description 2015 Techniques Inputs Type Rates  Properties held and used on which the Company recognized impairment losses $ 438,606,000 Discounted cash flows Discount rate Suburban 8% - 15%  Central Business District 6% - 8%   Exit Capitalization rate Suburban 7.5% - 9%  Central Business District 4.6% - 5.75%  

Commitments And Contingencies (

Commitments And Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
Future Minimum Rental Payments Of Ground Leases	   Year Amount  October 1 through December 31, 2016 $ 320  2017 2,024  2018 1,989  2019 1,999  2020 2,015  2021 through 2084 172,264   Total $ 180,611 
Mack Cali Realty LP [Member]
Future Minimum Rental Payments Of Ground Leases	   Year Amount  October 1 through December 31, 2016 $ 320  2017 2,024  2018 1,989  2019 1,999  2020 2,015  2021 through 2084 172,264   Total $ 180,611 

Tenant Leases (Tables)

Tenant Leases (Tables)	9 Months Ended
	Sep. 30, 2016
Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases	   Year Amount  October 1 through December 31, 2016 $ 119,973  2017 438,466  2018 379,744  2019 319,822  2020 273,424  2021 and thereafter 1,194,462   Total $ 2,725,891 
Mack Cali Realty LP [Member]
Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases	   Year Amount  October 1 through December 31, 2016 $ 119,973  2017 438,466  2018 379,744  2019 319,822  2020 273,424  2021 and thereafter 1,194,462   Total $ 2,725,891 

Mack-Cali Realty Corporation 38

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Tables)	9 Months Ended
	Sep. 30, 2016
Schedule Of Stock Option Plans	   Weighted Aggregate  Average Intrinsic  Shares Exercise Value  Under Options Price $(000’s)  Outstanding at January 1, 2016 805,000 $ 17.33 $ 4,843  Lapsed or Cancelled - -  Outstanding at September 30, 2016 ($17.31 – $21.25) 805,000 $ 17.33 $ 7,958  Options exercisable at September 30, 2016 538,334  Available for grant at September 30, 2016 2,728,507 
Schedule Of Restricted Stock Awards	   Weighted-Average  Grant – Date  Shares Fair Value  Outstanding at January 1, 2016 136,220 $ 19.36  Granted 36,870 21.70  Vested (61,654) 18.94  Forfeited (3,687) 21.70  Outstanding at September 30, 2016 107,749 $ 20.33 
Schedule Of Basic And Diluted Earnings Per Share	  Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Basic EPS 2016 2015 2016 2015  Net income (loss) $ (9,605) $ (142,141) $ 113,530 $ (106,077)  Add: Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Add (deduct): Noncontrolling interest in Operating Partnership 999 15,530 (11,947) 11,461  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034)   Weighted average common shares 89,755 89,249 89,739 89,229   Basic EPS :  Net income (loss) available to common shareholders $ (0.10) $ (1.42) $ 1.14 $ (1.05)      Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Diluted EPS 2016 2015 2016 2015  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034)  Add (deduct): Noncontrolling interest in Operating Partnership (999) (15,530) 11,947 (11,461)  Net income (loss) for diluted earnings per share $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common shares 100,253 100,172 100,486 100,236   Diluted EPS :  Net income (loss) available to common shareholders $ (0.10) $ (1.42) $ 1.13 $ (1.05)   The following schedule reconciles the shares used in the basic EPS calculation to the shares used in the diluted EPS calculation: (in thousands)   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Basic EPS shares 89,755 89,249 89,739 89,229  Add: Operating Partnership – common units 10,498 10,923 10,502 11,007  Restricted Stock Awards - - 50 -  Stock Options - - 195 -  Diluted EPS Shares 100,253 100,172 100,486 100,236 
Mack Cali Realty LP [Member]
Schedule Of Stock Option Plans	   Weighted Aggregate  Average Intrinsic  Shares Exercise Value  Under Options Price $(000’s)  Outstanding at January 1, 2016 805,000 $ 17.33 $ 4,843  Lapsed or Cancelled - -  Outstanding at September 30, 2016 ($17.31 – $21.25) 805,000 $ 17.33 $ 7,958  Options exercisable at September 30, 2016 538,334  Available for grant at September 30, 2016 2,728,507 
Schedule Of Restricted Stock Awards	   Weighted-Average  Grant – Date  Shares Fair Value  Outstanding at January 1, 2016 136,220 $ 19.36  Granted 36,870 21.70  Vested (61,654) 18.94  Forfeited (3,687) 21.70  Outstanding at September 30, 2016 107,749 $ 20.33 
Schedule Of Basic And Diluted Earnings Per Share	  Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Basic EPU 2016 2015 2016 2015  Net income (loss) $ (9,605) $ (142,141) $ 113,530 $ (106,077)  Add: Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common units 100,253 100,172 100,241 100,236   Basic EPU :  Net income (loss) available to common unitholders $ (0.10) $ (1.42) $ 1.14 $ (1.05)    Three Months Ended Nine Months Ended  September 30, September 30,  Computation of Diluted EPU 2016 2015 2016 2015  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495)   Weighted average common unit 100,253 100,172 100,486 100,236   Diluted EPU :  Net income (loss) available to common unitholders $ (0.10) $ (1.42) $ 1.13 $ (1.05)  The following schedule reconciles the units used in the basic EPU calculation to the units used in the diluted EPU calculation: (in thousands)     Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Basic EPU units 100,253 100,172 100,241 100,236  Add: Restricted Stock Awards - - 50 -  Stock Options - - 195 -  Diluted EPU Units 100,253 100,172 100,486 100,236 

Noncontrolling Interests In S39

Noncontrolling Interests In Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2016
Noncontrolling Interests In Subsidiaries [Abstract]
Schedule Of Activity Of Noncontrolling Interests	  Nine Months Ended  September 30,  2016 2015  Balance at January 1 $ 228,032 $ 257,230  Net income 11,487 (12,043)  Unit distributions (4,947) (4,927)  Acquisition/increase in noncontrolling interests in consolidated joint ventures (35,544) 251  Redemption of common units  for common stock (308) (5,370)  Stock compensation 1,511 -  Other comprehensive income (loss) (789) -  Rebalancing of ownership percentage  between parent and subsidiaries (865) 276  Balance at September 30 $ 198,577 $ 235,417 
Changes In Noncontrolling Interests Of Subsidiaries	   Common LTIP  Units Units  Balance at January 1, 2016 10,516,844 -  Granted - 657,373  Redemption of common units for shares of common stock (18,898) -  Balance at September 30, 2016 10,497,946 657,373 

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2016
Schedule Of Selected Results Of Operations And Asset Information	  Real Estate  Commercial Multi-family Corporate Total  & Other Multi-family Services & Other (d) Company  Total revenues:  Three months ended:  September 30, 2016 $ 141,226 $ 8,806 $ 9,842 (e) $ (2,357) $ 157,517  September 30, 2015 131,910 6,964 8,409 (f) (1,125) 146,158  Nine months ended:  September 30, 2016 411,947 27,011 27,990 (e) (7,281) 459,667  September 30, 2015 406,128 20,541 24,910 (f) (3,139) 448,440   Total operating and  interest expenses (a):  Three months ended:  September 30, 2016 $ 68,533 $ 5,005 $ 9,633 (g) $ 21,269 $ 104,440  September 30, 2015 59,810 4,233 9,598 (h) 28,236 101,877  Nine months ended:  September 30, 2016 201,914 16,337 29,879 (g) 65,789 313,919  September 30, 2015 199,178 12,775 28,304 (h) 79,804 320,061   Equity in earnings (loss) of  unconsolidated joint ventures:  Three months ended:  September 30, 2016 $ 22,487 $ (1,442) $ 745 $ - $ 21,790  September 30, 2015 5,181 (2,793) 747 - 3,135  Nine months ended:  September 30, 2016 23,569 (4,773) 826 - 19,622  September 30, 2015 4,611 (8,290) 956 - (2,723)   Net operating income (loss) (b):  Three months ended:  September 30, 2016 $ 95,180 $ 2,359 $ 954 $ (23,626) $ 74,867  September 30, 2015 77,281 (62) (442) (29,361) 47,416  Nine months ended:  September 30, 2016 233,602 5,901 (1,063) (73,070) 165,370  September 30, 2015 211,561 (524) (2,438) (82,943) 125,656   Total assets:  September 30, 2016 $ 3,394,462 $ 963,569 $ 15,441 $ 62,147 $ 4,435,619  December 31, 2015 3,166,577 836,020 9,831 41,535 4,053,963   Total long-lived assets (c):  September 30, 2016 $ 3,061,298 $ 667,602 $ 4,371 $ (4,455) $ 3,728,816  December 31, 2015 2,886,583 577,705 3,670 (1,531) 3,466,427   Total investments in  unconsolidated joint ventures:  September 30, 2016 $ 80,735 $ 238,261 $ 811 $ - $ 319,807  December 31, 2015 76,140 225,850 1,467 - 303,457   (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, acquisition related costs and interest expense (net of interest income). All interest expense, net of interest and other investment 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 $ 3.8 million and $10.1 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (f) Includes $ 1.5 million and $5.9 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2015, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (g) Includes $1.8 million and $4.9 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (h) Includes $1 million and $ 4.5 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016 , respectively, from the multi-family real estate segment, which are eliminated in consolidation.
Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders	   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Net operating income $ 74,867 $ 47,416 $ 165,370 $ 125,656  Add (deduct):  Depreciation and amortization (48,117) (44,099) (134,639) (127,266)  Gain on change of control of interests - - 15,347 -  Realized gains (losses) and unrealized losses on disposition of  rental property, net (17,053) 18,718 68,664 53,261  Gain on sale of investment in unconsolidated joint venture - - 5,670 6,448  Loss from extinguishment of debt, net (19,302) - (6,882) -  Impairments - (164,176) - (164,176)  Net income (loss) (9,605) (142,141) 113,530 (106,077)  Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Noncontrolling interest in Operating Partnership 999 15,530 (11,947) 11,461  Net income (loss) available to common shareholders $ (8,541) $ (126,892) $ 102,043 $ (94,034) 
Mack Cali Realty LP [Member]
Schedule Of Selected Results Of Operations And Asset Information	  Real Estate  Commercial Multi-family Corporate Total  & Other Multi-family Services & Other (d) Company  Total revenues:  Three months ended:  September 30, 2016 $ 141,226 $ 8,806 $ 9,842 (e) $ (2,357) $ 157,517  September 30, 2015 131,910 6,964 8,409 (f) (1,125) 146,158  Nine months ended:  September 30, 2016 411,947 27,011 27,990 (e) (7,281) 459,667  September 30, 2015 406,128 20,541 24,910 (f) (3,139) 448,440   Total operating and  interest expenses (a):  Three months ended:  September 30, 2016 $ 68,533 $ 5,005 $ 9,633 (g) $ 21,269 $ 104,440  September 30, 2015 59,810 4,233 9,598 (h) 28,236 101,877  Nine months ended:  September 30, 2016 201,914 16,337 29,879 (g) 65,789 313,919  September 30, 2015 199,178 12,775 28,304 (h) 79,804 320,061   Equity in earnings (loss) of  unconsolidated joint ventures:  Three months ended:  September 30, 2016 $ 22,487 $ (1,442) $ 745 $ - $ 21,790  September 30, 2015 5,181 (2,793) 747 - 3,135  Nine months ended:  September 30, 2016 23,569 (4,773) 826 - 19,622  September 30, 2015 4,611 (8,290) 956 - (2,723)   Net operating income (loss) (b):  Three months ended:  September 30, 2016 $ 95,180 $ 2,359 $ 954 $ (23,626) $ 74,867  September 30, 2015 77,281 (62) (442) (29,361) 47,416  Nine months ended:  September 30, 2016 233,602 5,901 (1,063) (73,070) 165,370  September 30, 2015 211,561 (524) (2,438) (82,943) 125,656   Total assets:  September 30, 2016 $ 3,394,462 $ 963,569 $ 15,441 $ 62,147 $ 4,435,619  December 31, 2015 3,166,577 836,020 9,831 41,535 4,053,963   Total long-lived assets (c):  September 30, 2016 $ 3,061,298 $ 667,602 $ 4,371 $ (4,455) $ 3,728,816  December 31, 2015 2,886,583 577,705 3,670 (1,531) 3,466,427   Total investments in  unconsolidated joint ventures:  September 30, 2016 $ 80,735 $ 238,261 $ 811 $ - $ 319,807  December 31, 2015 76,140 225,850 1,467 - 303,457   (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, acquisition related costs and interest expense (net of interest income). All interest expense, net of interest and other investment 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 $ 3.8 million and $10.1 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (f) Includes $ 1.5 million and $5.9 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2015, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (g) Includes $1.8 million and $4.9 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation. (h) Includes $1 million and $ 4.5 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016 , respectively, from the multi-family real estate segment, which are eliminated in consolidation.
Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders	   Three Months Ended Nine Months Ended  September 30, September 30,  2016 2015 2016 2015  Net operating income $ 74,867 $ 47,416 $ 165,370 $ 125,656  Add (deduct):  Depreciation and amortization (48,117) (44,099) (134,639) (127,266)  Gain on change of control of interests - - 15,347 -  Realized gains (losses) and unrealized losses on disposition of  rental property, net (17,053) 18,718 68,664 53,261  Gain on sale of investment in unconsolidated joint venture - - 5,670 6,448  Loss from extinguishment of debt, net (19,302) - (6,882) -  Impairments - (164,176) - (164,176)  Net income (loss) (9,605) (142,141) 113,530 (106,077)  Noncontrolling interest in consolidated joint ventures 65 (281) 460 582  Net income (loss) available to common unitholders $ (9,540) $ (142,422) $ 113,990 $ (105,495) 

Organization And Basis Of Pre41

Organization And Basis Of Presentation (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)ft²statepropertyitem	Dec. 31, 2015USD ($)
Real Estate Properties [Line Items]
Percentage of ownership interest	89.50%	89.50%
Number of properties owned or investment interests	263
Aggregate square feet of the property owned or investment interest | ft²	29,000,000
Number of states where properties are located | state	7
Consolidated joint ventures, total real estate assets | $	$ 193.1	$ 273.4
Consolidated joint ventures, mortgages | $	70.1	89.5
Consolidated joint ventures, other liabilities | $	$ 20.7	$ 17.5
Commercial Properties [Member]
Real Estate Properties [Line Items]
Number of tenants | item	1,800
Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	17
Number of Apartment Units | item	5,214
Office And Office/Flex Buildings [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	94
Office [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	136
Aggregate square feet of the property owned or investment interest | ft²	23,700,000
Office Flex Buildings [Member]
Real Estate Properties [Line Items]
Aggregate square feet of the property owned or investment interest | ft²	4,800,000
Flex Properties [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	110
Unconsolidated Joint Venture Office Buildings [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	36
Aggregate square feet of the property owned or investment interest | ft²	5,600,000
Industrial/Warehouse Facilities [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	6
Aggregate square feet of the property owned or investment interest | ft²	387,400
Unconsolidated Joint Venture Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	10
Number of Apartment Units | item	3,587
Parking/Retail [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	6
Aggregate square feet of the property owned or investment interest | ft²	130,100
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 | ft²	81,700
Unconsolidated Joint Venture Hotel [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	1
Number of Apartment Units | item	350
Land [Member]
Real Estate Properties [Line Items]
Number of properties owned or investment interests	3

Significant Accounting Polici42

Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Oct. 05, 2016	Jan. 06, 2016
Significant Accounting Policies [Line Items]
Capitalized development and construction salaries and other related costs	$ 700,000		$ 900,000	$ 1,900,000	$ 3,500,000
Construction, tenant improvement, and development in-progress	301,000,000	$ 88,700,000		$ 301,000,000		$ 88,700,000
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	1,234,000		945,000	3,583,000	2,846,000
Loss from extinguishment of debt, net				12,420,000
Write off of unamortized deferred financing costs	346,000			346,000
Deferred leasing costs	790,000		922,000	2,440,000	2,738,000
Deferred tax asset	$ 21,800,000			21,800,000
Income taxes, material adjustment amount				$ 0
Common stock, shares outstanding	89,647,337	89,583,950		89,647,337		89,583,950		89,584,008
Common units outstanding	10,497,946	10,516,844		10,497,946		10,516,844		10,516,844
LTIP units outstanding	657,373			657,373
Distributions payable, record date				Oct. 5, 2016		Jan. 6, 2016
Distributions payable, approved date		Dec. 8, 2015		Sep. 27, 2016
Common stock dividends and common unit distributions per share		$ 0.15		$ 0.15
Restricted stock expense	$ 2,046,000		$ 695,000	$ 4,299,000	$ 1,500,000
Distributions payable, pay date		Jan. 15, 2016		Oct. 14, 2016
Subsequent Event [Member]
Significant Accounting Policies [Line Items]
Common stock, shares outstanding							89,647,443
Common units outstanding							10,497,946
LTIP units outstanding							657,373

Significant Accounting Polici43

Significant Accounting Policies (Estimated Useful Lives Of Assets) (Details)	9 Months Ended
	Sep. 30, 2016
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

Recent Transactions (Consolidat

Recent Transactions (Consolidations) (Narrative) (Details) $ in Thousands	Jul. 08, 2016USD ($)	Jan. 19, 2016USD ($)	Jan. 05, 2016USD ($)item	Jun. 30, 2016USD ($)item	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)
Real Estate Properties [Line Items]
Purchase price of property					$ 94,017	$ 59,700
Gain on change of control of interests					15,347
Gain on sale of investment in unconsolidated joint venture					5,670	$ 6,448
Overlook Ridge Apartments Investors, L.L.C. [Member]
Real Estate Properties [Line Items]
Percentage of interest in venture			50.00%
Number of units | item			371
Purchase price of property			$ 39,800
Loans assumed			$ 52,700
Gain on change of control of interests					$ 10,200
Spread over LIBOR		3.625%
Mortgage loan, maturity date					Feb. 1, 2023
Mortgage loan carrying amount		$ 72,500
Portside Apartment Holdings, L.L.C. [Member]
Real Estate Properties [Line Items]
Purchase price of property				$ 39,600
Portside Apartment Developers, L.L.C. [Member]
Real Estate Properties [Line Items]
Percentage of interest in venture				38.25%
Number of units | item				175
Purchase price of property				$ 39,600
Loans assumed				$ 42,500
Gain on change of control of interests					$ 5,200
Spread over LIBOR	3.44%
Mortgage loan carrying amount	$ 59,000

Recent Transactions (Other Inve

Recent Transactions (Other Investments) (Narrative) (Details) $ in Thousands	Apr. 26, 2016USD ($)	Sep. 30, 2016USD ($)ft²item	Sep. 30, 2015USD ($)
Real Estate Properties [Line Items]
Purchase price of property | $		$ 94,017	$ 59,700
Weehawken, New Jersey [Member]
Real Estate Properties [Line Items]
Purchase price of property | $	$ 36,400
Port Imperial 4/5 Garage And Retail [Member] | Projects Under Development And Developable Land [Member]
Real Estate Properties [Line Items]
Number of units | item		1,100
Area of property (in square feet) | ft²		290,000
Percentage of interest in venture		52.50%
Port Imperial South 11 [Member]
Real Estate Properties [Line Items]
Number of units | item		295

Recent Transactions (Rental Pro

Recent Transactions (Rental Property Held for Sale, Net) (Narrative) (Details) $ in Thousands, ft² in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016USD ($)ft²itemproperty	Sep. 30, 2016USD ($)ft²itemproperty	Dec. 31, 2015property
Real Estate Properties [Line Items]
Unrealized losses on properties held for sale		$ (24,393)
Number of properties sold | property			6
Sales proceeds		$ 452,183
Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of units | item	5,214	5,214
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Estimated expected sales proceeds	$ 113,000
Assets held for sale, Deferred charges and other assets	7,600	$ 7,600
Assets held for sale, Unbilled rents receivable, net	5,600	5,600
Assets held for sale, Accounts payable, accrued expenses and other liabilities	2,900	2,900
Assets held for sale, Rents received in advance and security deposits	$ 2,800	2,800
Expected assets to be written off		12,500
Expected liabilities to be written off		$ 2,800
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Office [Member]
Real Estate Properties [Line Items]
Area of property (in square feet) | ft²	1.8	1.8
Number of properties held for sale | property	14	14

Recent Transactions (Unconsolid

Recent Transactions (Unconsolidated Joint Venture Activity) (Narrative) (Details) $ in Thousands	May 26, 2016USD ($)item	Apr. 01, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016	Sep. 30, 2016USD ($)item	Sep. 30, 2015USD ($)
Real Estate Properties [Line Items]
Purchase price of property					$ 94,017	$ 59,700
Gain on sale of investment in unconsolidated joint venture					5,670	6,448
Proceeds from the sale of investments in unconsolidated joint ventures					$ 6,420	$ 6,448
Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of units | item					5,214
PruRose Riverwalk G, L.L.C. [Member]
Real Estate Properties [Line Items]
Purchase price of property		$ 11,300	$ 11,300
Percentage of additional interest acquired		50.00%		25.00%
Number of units | item					316
PruRose Port Imperial South 15, L.L.C. [Member]
Real Estate Properties [Line Items]
Number of units | item	236
Percentage of interest in venture	50.00%
PruRose Port Imperial South 13, L.L.C. [Member]
Real Estate Properties [Line Items]
Percentage of interest in venture	20.00%
PruRose Port Imperial South 13, L.L.C. [Member] | Multi-Family Properties [Member]
Real Estate Properties [Line Items]
Number of units | item	280
Pru Rose Port Imperial South 15 L.L.C. And Pru Rose Port Imperial South 13 L.L.C. [Member]
Real Estate Properties [Line Items]
Gain on sale of investment in unconsolidated joint venture	$ 5,700
Proceeds from the sale of investments in unconsolidated joint ventures	$ 6,400

Recent Transactions (Schedule O

Recent Transactions (Schedule Of Properties Acquired) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)ft²item
Business Acquisition [Line Items]
Number of Buildings, Acquired | item	5
Rentable Square Feet, Acquired | ft²	1,058,462
Acquisition Cost | $	$ 326,811
11 Martine Avenue [Member]
Business Acquisition [Line Items]
Number of Buildings, Acquired | item	1	[1]
Rentable Square Feet, Acquired | ft²	82,000	[1]
Acquisition Cost | $	$ 10,750	[1]
Number of apartment units | item	4
Area of property (in square feet) | ft²	262,000
320, 321 University Avenue [Member]
Business Acquisition [Line Items]
Number of Buildings, Acquired | item	2	[2]
Rentable Square Feet, Acquired | ft²	147,406	[2]
Acquisition Cost | $	$ 23,000	[2]
101 Wood Avenue South [Member]
Business Acquisition [Line Items]
Number of Buildings, Acquired | item	1	[3]
Rentable Square Feet, Acquired | ft²	262,841	[3]
Acquisition Cost | $	$ 82,300	[3]
111 River Street [Member]
Business Acquisition [Line Items]
Number of Buildings, Acquired | item	1	[3]
Rentable Square Feet, Acquired | ft²	566,215	[3]
Acquisition Cost | $	$ 210,761	[3]
[1]	Acquisition represented four units of condominium interests which collectively comprise floors 2 through 5. Upon completion of the acquisition, the Company owns the entire 14-story 262,000 square-foot building. The acquisition was funded using available cash.
[2]	This acquisition was funded through borrowings under the Company's unsecured revolving credit facility.
[3]	This acquisition was funded using available cash and through borrowings under the Company's unsecured revolving credit facility.

Recent Transactions (Schedule49

Recent Transactions (Schedule Of Purchase Price Allocation) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Above Market, In-Place And Below Market Leases [Member]
Business Acquisition [Line Items]
Amortization period	8 years 1 month 6 days
11 Martine Avenue [Member]
Business Acquisition [Line Items]
Land and leasehold interest	$ 2,460
Buildings and improvements	8,290
Net assets recorded upon acquisition/consolidation	10,750
320, 321 University Avenue [Member]
Business Acquisition [Line Items]
Land and leasehold interest	7,305
Buildings and improvements	15,695
Net assets recorded upon acquisition/consolidation	23,000
101 Wood Avenue South [Member]
Business Acquisition [Line Items]
Land and leasehold interest	8,509
Buildings and improvements	72,738
Above market leases	58	[1]
In-place lease values	6,743	[1]
Sub Total	88,048
Less: Below market lease values	(5,748)	[1]
Net assets recorded upon acquisition/consolidation	82,300
111 River Street [Member]
Business Acquisition [Line Items]
Land and leasehold interest	204
Buildings and improvements	198,609
Above market leases	617	[1]
In-place lease values	43,801	[1]
Other assets	11,279
Sub Total	254,510
Less: Below market lease values	(43,749)	[1]
Net assets recorded upon acquisition/consolidation	$ 210,761
[1]	Above market, in-place and below market leases will be amortized over a weighted-average term of 8.1 years.

Recent Transactions (Schedule50

Recent Transactions (Schedule Of Net Assets Recorded Upon Consolidation) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
In-Place And Below Market Leases [Member]
Business Acquisition [Line Items]
Amortization period	7 months
Overlook Ridge Apartments Investors, L.L.C. [Member]
Business Acquisition [Line Items]
Land and Leasehold Interests	$ 11,072
Buildings and improvements	87,793
Furniture, fixtures and equipment	1,695
Other assets	237
In-place lease values	4,389	[1]
Less: Below market lease values	(489)	[1]
Sub Total	104,697
Less: Debt assumed	(52,662)
Net assets recorded upon acquisition/consolidation	52,035
Portside Apartment Holdings, L.L.C. [Member]
Business Acquisition [Line Items]
Buildings and improvements	73,713
Furniture, fixtures and equipment	1,038
Other assets	10,181
In-place lease values	2,637	[1]
Less: Below market lease values	(242)	[1]
Sub Total	87,327
Less: Debt assumed	(42,500)
Net assets recorded upon acquisition/consolidation	$ 44,827
[1]	In-place lease values and below-market lease values will be amortized over a weighted average term of 7 months.

Recent Transactions (Schedule51

Recent Transactions (Schedule Of Dispositions/Rental Property Held For Sale) (Details) $ in Thousands		3 Months Ended	9 Months Ended		12 Months Ended
		Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)item	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2012USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			13
Net Sales Proceeds			$ 452,183
Net Book Value			359,126
Realized Gain (loss)/Unrealized Loss			93,057
Unrealized losses on properties held for sale			(24,393)
Totals			$ 68,664
Impairments		$ 164,176		$ 164,176
2 Independence Way [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item	[1]		1
Net Sales Proceeds	[1]		$ 4,119
Net Book Value	[1]		4,283
Realized Gain (loss)/Unrealized Loss	[1]		$ (164)
Impairments					$ 3,200
1201 Connecticut Avenue NW [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			1
Net Sales Proceeds			$ 90,591
Net Book Value			31,827
Realized Gain (loss)/Unrealized Loss			$ 58,764
125 Broad Street [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item	[2]		1
Net Sales Proceeds	[2]		$ 192,323
Net Book Value	[2]		200,183
Realized Gain (loss)/Unrealized Loss	[2]		$ (7,860)
Impairments					83,200
9200 Edmonston Road [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			1
Net Sales Proceeds	[3]		$ 4,083
Net Book Value			3,837
Realized Gain (loss)/Unrealized Loss			$ 246
Impairments						$ 3,000
1400 L Street [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			1
Net Sales Proceeds	[4]		$ 68,399
Net Book Value			30,053
Realized Gain (loss)/Unrealized Loss			38,346
Net sales proceeds held by qualified intermediary			$ 28,500
600 Parsippany Road [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			1
Net Sales Proceeds	[5]		$ 10,465
Net Book Value			5,875
Realized Gain (loss)/Unrealized Loss			4,590
Net sales proceeds held by qualified intermediary			$ 10,500
4, 5, 6 Century Drive [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item	[6]		3
Net Sales Proceeds	[6]		$ 14,533
Net Book Value	[6]		17,308
Realized Gain (loss)/Unrealized Loss	[6]		$ (2,775)
Impairments					9,800
Andover Place [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			1
Net Sales Proceeds			$ 39,863
Net Book Value			37,150
Realized Gain (loss)/Unrealized Loss			$ 2,713
222, 233 Mount Airy Road [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item	[7]		2
Net Sales Proceeds	[7]		$ 8,817
Net Book Value	[7]		9,039
Realized Gain (loss)/Unrealized Loss	[7]		$ (222)
Impairments					$ 1,000
10 Mountainview Road [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings, Disposed | item			1
Net Sales Proceeds			$ 18,990
Net Book Value			19,571
Realized Gain (loss)/Unrealized Loss			$ (581)
Multi-Family Properties [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of rental units | item			5,214
[1]	The Company recorded an impairment charge of $3.2 million on this property during the year ended December 31, 2015.
[2]	The Company recorded impairment charges of $83.2 million on this property during the year ended December 31, 2015.
[3]	The Company transferred the deed for this property to the lender in satisfaction of its obligations. The Company recorded an impairment charge of $3.0 million on this property during the year ended December 31, 2012.
[4]	$28.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.
[5]	$10.5 million of the net sales proceeds from this sale were held by a qualified intermediary until such funds are used in acquisitions.
[6]	The Company recorded impairment charges of $9.8 million on these properties during the year ended December 31, 2015.
[7]	The Company recorded impairment charges of $1 million on these properties during the year ended December 31, 2015.

Recent Transactions (Summary Of

Recent Transactions (Summary Of Income (Loss) From Properties Disposed) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Real Estate Properties [Line Items]
Total revenues	$ 157,517	$ 146,158	$ 459,667	$ 448,440
Depreciation and amortization	(48,117)	(44,099)	(134,639)	(127,266)
Operating income (loss)	27,931	(139,310)	82,528	(84,949)
Impairments		(164,176)		(164,176)
Realized gains/unrealized Losses on disposition	(17,053)	18,718	68,664	53,261
Net income (loss) available to common shareholders	(8,541)	(126,892)	102,043	(94,034)
Disposal Group, Not Discontinued Operations [Member]
Real Estate Properties [Line Items]
Total revenues	1,854	12,934	20,048	47,583
Operating and other expenses	(1,709)	(7,273)	(13,374)	(25,488)
Depreciation and amortization	(2,979)	(7,798)	(11,590)	(20,061)
Interest expense	(625)	(1,241)	(2,011)	(6,621)
Operating income (loss)	(3,459)	(3,378)	(6,927)	(4,587)
Impairments		(61,891)		(61,891)
Realized gains/unrealized Losses on disposition	7,340	18,718	93,057	53,261
Net income (loss) available to common shareholders	$ 3,881	$ (46,551)	$ 86,130	$ (13,217)

Recent Transactions (Summary 53

Recent Transactions (Summary Of Income From Property Held For Sale) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Less - accumulated depreciation	$ (1,351,825)	$ (1,464,482)
Rental property held for sale, net	102,798
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Land	34,802
Buildings and improvements	165,231
Less - accumulated depreciation	(72,842)
Less: Unrealized losses on properties held for sale	(24,393)
Rental property held for sale, net	$ 102,798

Investments In Unconsolidated54

Investments In Unconsolidated Joint Ventures (Narrative) (Details) $ in Thousands, ft² in Millions	Sep. 14, 2016USD ($)	Sep. 13, 2016USD ($)	Sep. 30, 2016USD ($)ft²propertyitem	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)ft²propertyitem	Dec. 31, 2015USD ($)	Oct. 06, 2015
Schedule of Equity Method Investments [Line Items]
Company's net investment in unconsolidated joint ventures			$ 319,807		$ 319,807	$ 303,457
Amount outstanding			95,000		95,000	155,000
Management, leasing, development and other services fees			900	$ 1,400
Accounts receivable due from unconsolidated joint ventures			1,400		1,400	800
Maximum exposure to loss			205,600		205,600
Estimated future funding commitments			22,000		22,000
Issuance of loan	$ 17,800
Accounts payable, accrued expenses and other liabilities			$ 185,326		$ 185,326	$ 135,057
Unconsolidated Joint Venture Office Buildings [Member]
Schedule of Equity Method Investments [Line Items]
Number of properties | property			36		36
Unconsolidated Joint Venture Office And Retail Buildings [Member]
Schedule of Equity Method Investments [Line Items]
Area of property (in square feet) | ft²			5.7		5.7
Unconsolidated Joint Venture Retail Buildings [Member]
Schedule of Equity Method Investments [Line Items]
Number of properties | property			2		2
Unconsolidated Joint Venture Multi-Family Properties [Member]
Schedule of Equity Method Investments [Line Items]
Number of properties | property			10		10
Number of units | item			3,587		3,587
Unconsolidated Joint Venture Hotel [Member]
Schedule of Equity Method Investments [Line Items]
Number of units | item			350		350
Percentage of interest in venture							90.00%
Unconsolidated Joint Venture Development Projects [Member]
Schedule of Equity Method Investments [Line Items]
Number of units | item			822		822
Unconsolidated Joint Venture Land Parcels [Member]
Schedule of Equity Method Investments [Line Items]
Number of units | item			4,151		4,151
Unconsolidated Joint Ventures [Member] | Guarantee of Indebtedness of Others [Member]
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity			$ 272,200		$ 272,200
Amount outstanding			221,800		221,800
Unconsolidated Joint Ventures [Member] | Parent Company [Member] | Guarantee of Indebtedness of Others [Member]
Schedule of Equity Method Investments [Line Items]
Maximum guaranteed amount			22,000		22,000
Guaranteed amount			$ 22,000		$ 22,000
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]
Company's net investment in unconsolidated joint ventures			$ 183,600		$ 183,600
Number of VIEs | property			4		4
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Letter of credit			$ 3,000		$ 3,000
Property Debt, Balance		$ 59,100	$ 100,000		$ 100,000
Property Debt, Interest Rate		6.15%	3.668%		3.668%
Mortgage loan, maturity date		Nov. 1, 2016			Oct. 1, 2026
Issuance of loan	$ 35,700
Accounts payable, accrued expenses and other liabilities			$ 3,317		$ 3,317

Investments In Unconsolidated55

Investments In Unconsolidated Joint Ventures (Summary Of Unconsolidated Joint Ventures) (Details) $ in Thousands		Sep. 13, 2016USD ($)	Apr. 01, 2016USD ($)	Oct. 31, 2016USD ($)	Jun. 30, 2016USD ($)	Sep. 30, 2016USD ($)ft²propertyitem	Sep. 30, 2015USD ($)	May 26, 2016item	Dec. 31, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
Carrying Amount						$ 319,807			$ 303,457
Accounts payable, accrued expenses and other liabilities						185,326			135,057
Purchase price of property						$ 94,017	$ 59,700
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Company's Effective Ownership %						7.50%
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Company's Effective Ownership %						85.00%
Riverwalk G Urban Renewal, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's Effective Ownership %					50.00%
Riverwalk G Urban Renewal, L.L.C. [Member] | Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Maturity Date				Oct. 1, 2026
Property Debt, Interest Rate				3.21%
Mortgage loan face amount				$ 82,000
PruRose Riverwalk G, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						316
Purchase price of property			$ 11,300		$ 11,300
Crystal House Apartments Investors LLC [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in developable land						50.00%
Number of units available for development | item						295
Number of approved units available for development | item						252
Portside Apartment Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Investment Ownership Percentage					100.00%
Purchase price of property					$ 39,600
RoseGarden Marbella South, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Interest Rate, Spread Over LIBOR	[1]					2.25%
RoseGarden Marbella South, L.L.C. [Member] | Construction Loan [Member]
Schedule of Equity Method Investments [Line Items]
Number of extension options | item						2
Loan extension period						1 year
Extension fee						0.25%
Maximum borrowing capacity						$ 77,400
Harborside Unit A Urban Renewal, LLC [Member] | Construction/Permanent Loan [Member]
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity						$ 192,000
PruRose Port Imperial South 15, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item								236
Red Bank Corporate Plaza, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Interest Rate, Spread Over LIBOR						3.00%
KPG-P 100 IMW JV, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Interest Rate, Spread Over LIBOR	[2]					5.95%
Number of extension options | item						3
Loan extension period						1 year
Keystone-Penn [Member] | Principal Balance Due August 27, 2023 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 127,538
Property Debt, Maturity Date						Aug. 27, 2023
Property Debt, Interest Rate						5.114%
Keystone-Penn [Member] | Principal Balance Due September 6, 2025 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 45,500
Property Debt, Maturity Date						Sep. 6, 2025
Property Debt, Interest Rate						5.01%
Keystone-Penn [Member] | Principal Balance Due October 31, 2016 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 17,911
Property Debt, Maturity Date						Oct. 31, 2016
Property Debt, Interest Rate						8.00%
Keystone-Penn [Member] | Principal Balance Due August 31, 2019 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 22,500
Property Debt, Maturity Date						Aug. 31, 2019
Property Debt, Interest Rate						5.20%
Property Debt, Interest Rate, LIBOR						LIBOR+5.2
Keystone-Penn [Member] | Principal Balance Due January 9, 2019 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 11,250
Property Debt, Maturity Date						Jan. 9, 2019
Property Debt, Interest Rate						5.50%
Property Debt, Interest Rate, LIBOR						LIBOR+5.5
Keystone-Penn [Member] | Principal Balance Due August 27, 2017 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 10,425
Property Debt, Maturity Date						Aug. 27, 2017
Property Debt, Interest Rate						6.00%
Property Debt, Interest Rate, LIBOR						LIBOR+6.0
Keystone-Penn [Member] | Keystone Property Group [Member]
Schedule of Equity Method Investments [Line Items]
Internal rate of return						15.00%
Keystone-Penn [Member] | Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Internal rate of return						10.00%
Keystone-TriState [Member]
Schedule of Equity Method Investments [Line Items]
Capital balance in properties in which senior pari passu interest is held						$ 2,800
Number of properties with senior pari passu interest | property						5
Keystone-TriState [Member] | Principal Balance Due July 1, 2017 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 47,500
Property Debt, Maturity Date						Jul. 1, 2017
Property Debt, Interest Rate						5.38%
Keystone-TriState [Member] | Principal Balance Due September 9, 2017 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 78,121
Property Debt, Maturity Date						Sep. 9, 2017
Keystone-TriState [Member] | Principal Balance Due September 9, 2017 [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Effective rate						5.65%
Keystone-TriState [Member] | Principal Balance Due September 9, 2017 [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Effective rate						6.75%
Keystone-TriState [Member] | Principal Balance Due July 6, 2024 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 14,250
Property Debt, Maturity Date						Jul. 6, 2024
Property Debt, Interest Rate						4.88%
Keystone-TriState [Member] | Principal Balance Due July 6, 2044 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 63,400
Property Debt, Maturity Date						Jul. 6, 2044
Property Debt, Interest Rate						4.93%
Keystone-TriState [Member] | Principal Balance Due August 6, 2044 [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 15,050
Property Debt, Maturity Date						Aug. 6, 2044
Property Debt, Interest Rate						4.71%
Keystone-TriState [Member] | Parent Company [Member]
Schedule of Equity Method Investments [Line Items]
Internal rate of return						10.00%
Keystone-TriState [Member] | Keystone Entities [Member]
Schedule of Equity Method Investments [Line Items]
Internal rate of return						15.00%
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance		$ 59,100				$ 100,000
Property Debt, Maturity Date		Nov. 1, 2016				Oct. 1, 2026
Property Debt, Interest Rate		6.15%				3.668%
Accounts payable, accrued expenses and other liabilities						$ 3,317
Other [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Amount						$ 319,807			303,457
The Shops At 40 Park Property [Member] | Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						50,973
Property Debt, Balance						$ 6,354
Property Debt, Maturity Date						Aug. 1, 2018
Property Debt, Interest Rate						3.63%
Residual ownership interest						12.50%
Lofts At 40 Park Property [Member] | Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						59
Indirect ownership interest						25.00%
Number of stories | item						5
Metropolitan Property [Member] | Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Property Debt, Balance						$ 37,836
Property Debt, Maturity Date						Sep. 1, 2020
Property Debt, Interest Rate						3.25%
Port Imperial North Land [Member] | Roseland/Port Imperial Partners, L.P. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						836
Residual ownership interest						20.00%
Unconsolidated Joint Venture Multi-Family Properties [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						3,587
Unconsolidated Joint Venture Multi-Family Properties [Member] | Marbella RoseGarden, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3]					412
Company's Effective Ownership %	[3],[4]					24.27%
Carrying Amount	[3]					$ 15,360			15,569
Property Debt, Balance	[3]					$ 95,000
Property Debt, Maturity Date	[3]					May 1, 2018
Property Debt, Interest Rate	[3]					4.99%
Unconsolidated Joint Venture Multi-Family Properties [Member] | RoseGarden Monaco Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3]					523
Company's Effective Ownership %	[3],[4]					15.00%
Carrying Amount	[3]					$ 68			937
Property Debt, Balance	[3]					$ 165,000
Property Debt, Maturity Date	[3]					Feb. 1, 2021
Property Debt, Interest Rate	[3]					4.19%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3],[5]					130
Company's Effective Ownership %	[3],[4],[5]					12.50%
Carrying Amount	[3],[5]					$ 6,958			5,723
Property Debt, Balance	[3],[5],[6]					$ 44,190
Property Debt, Interest Rate	[3],[5]
Unconsolidated Joint Venture Multi-Family Properties [Member] | Riverwalk G Urban Renewal, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3],[7]					316
Company's Effective Ownership %	[3],[4],[7]					50.00%
Carrying Amount	[3],[7]					$ 10,464
Property Debt, Balance	[3],[7]					$ 79,067
Property Debt, Maturity Date	[3],[7]					Jul. 15, 2021
Property Debt, Interest Rate	[3],[7],[8]					6.00%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Elmajo Urban Renewal Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3]					355
Company's Effective Ownership %	[3],[4]					7.50%
Property Debt, Balance	[3]					$ 128,100
Property Debt, Maturity Date	[3]					Mar. 1, 2030
Property Debt, Interest Rate	[3]					4.00%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Crystal House Apartments Investors LLC [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[9]					794
Company's Effective Ownership %	[4],[9]					25.00%
Carrying Amount	[9]					$ 30,493			28,114
Property Debt, Balance	[9]					$ 165,000
Property Debt, Maturity Date	[9]					Apr. 1, 2020
Property Debt, Interest Rate	[9]					3.17%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Roseland/Port Imperial Partners, L.P. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3],[10]					363
Company's Effective Ownership %	[3],[4],[10]					20.00%
Carrying Amount	[3],[10]					$ 1,678			1,678
Unconsolidated Joint Venture Multi-Family Properties [Member] | RoseGarden Marbella South, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						311
Company's Effective Ownership %	[4]					24.27%
Carrying Amount						$ 17,895			16,728
Property Debt, Balance						$ 72,955
Property Debt, Maturity Date						Mar. 30, 2017
Property Debt, Interest Rate, LIBOR	[11]					L+2.25
Unconsolidated Joint Venture Multi-Family Properties [Member] | Estuary Urban Renewal Unit B, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item	[3]					227
Company's Effective Ownership %	[3],[4]					7.50%
Property Debt, Balance	[3]					$ 81,900
Property Debt, Maturity Date	[3]					Mar. 1, 2030
Property Debt, Interest Rate	[3]					4.00%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Riverpark At Harrison I, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						141
Company's Effective Ownership %	[4]					45.00%
Carrying Amount						$ 2,169			2,544
Property Debt, Balance						$ 30,000
Property Debt, Maturity Date						Aug. 1, 2025
Property Debt, Interest Rate						3.70%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Capitol Place Mezz LLC [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						378
Company's Effective Ownership %	[4]					50.00%
Carrying Amount						$ 44,103			46,267
Property Debt, Balance						$ 100,700
Property Debt, Maturity Date						Jul. 1, 2033
Property Debt, Interest Rate						4.82%
Unconsolidated Joint Venture Multi-Family Properties [Member] | Harborside Unit A Urban Renewal, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						763
Company's Effective Ownership %	[4]					85.00%
Carrying Amount						$ 99,358			96,799
Property Debt, Balance						$ 142,746
Property Debt, Maturity Date						Aug. 1, 2029
Property Debt, Interest Rate	[1]					5.197%
Unconsolidated Joint Venture Multi-Family Properties [Member] | RoseGarden Monaco, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						250
Company's Effective Ownership %	[4]					41.67%
Carrying Amount						$ 1,385			1,339
Unconsolidated Joint Venture Multi-Family Properties [Member] | Grand Jersey Waterfront URA, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						850
Company's Effective Ownership %	[4]					50.00%
Carrying Amount						$ 337			337
Unconsolidated Joint Venture Multi-Family Properties [Member] | Hillsborough 206 Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						160,000
Company's Effective Ownership %	[4]					50.00%
Carrying Amount						$ 1,962			1,962
Unconsolidated Joint Venture Multi-Family Properties [Member] | Plaza VIII & IX Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						1,225,000
Company's Effective Ownership %	[4]					50.00%
Carrying Amount						$ 4,311			4,055
Unconsolidated Joint Venture Office Buildings [Member] | Red Bank Corporate Plaza, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						92,878
Company's Effective Ownership %	[4]					50.00%
Carrying Amount						$ 4,204			4,140
Property Debt, Balance						$ 14,626
Property Debt, Maturity Date						May 17, 2017
Property Debt, Interest Rate, LIBOR						L+3.00
Unconsolidated Joint Venture Office Buildings [Member] | 12 Vreeland Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						139,750
Company's Effective Ownership %	[4]					50.00%
Carrying Amount						$ 6,157			5,890
Property Debt, Balance						$ 11,420
Property Debt, Maturity Date						Jul. 1, 2023
Property Debt, Interest Rate						2.87%
Unconsolidated Joint Venture Office Buildings [Member] | BNES Associates III [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						106,345
Company's Effective Ownership %	[4]					31.25%
Carrying Amount						$ 2,695			2,295
Property Debt, Balance						$ 5,646
Property Debt, Maturity Date						Nov. 1, 2023
Property Debt, Interest Rate						4.76%
Unconsolidated Joint Venture Office Buildings [Member] | KPG-P 100 IMW JV, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						339,615
Company's Effective Ownership %	[4]					33.33%
Property Debt, Balance						$ 72,000
Property Debt, Maturity Date						Sep. 8, 2018
Property Debt, Interest Rate, LIBOR	[2]					L+5.95
Unconsolidated Joint Venture Office Buildings [Member] | Keystone-Penn [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						1,842,820
Company's Effective Ownership %	[4],[12]
Property Debt, Balance	[13]					$ 235,124
Property Debt, Interest Rate
Unconsolidated Joint Venture Office Buildings [Member] | Keystone-TriState [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²						1,266,384
Company's Effective Ownership %	[4],[14]
Carrying Amount						$ 2,771			3,958
Property Debt, Balance	[15]					$ 218,321
Property Debt, Interest Rate
Unconsolidated Joint Venture Office Buildings [Member] | KPG-MCG Curtis JV, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²	[16]					885,000
Company's Effective Ownership %	[4],[16]					50.00%
Carrying Amount	[16]					$ 64,909			59,858	[17]
Property Debt, Balance	[16]
Property Debt, Interest Rate	[16]
Unconsolidated Joint Venture Other Property [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Amount						$ 319,807			303,457
Property Debt, Balance						$ 1,761,795
Unconsolidated Joint Venture Other Property [Member] | Roseland/North Retail, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Rentable Square Feet (sf) | ft²	[3]					30,745
Company's Effective Ownership %	[3],[4]					20.00%
Carrying Amount	[3]					$ 1,719			1,758
Unconsolidated Joint Venture Other Property [Member] | South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Number of Apartment Units | item						350
Company's Effective Ownership %	[4],[18]					50.00%
Carrying Amount
Property Debt, Balance						$ 100,000
Property Debt, Maturity Date						Oct. 1, 2026
Property Debt, Interest Rate						3.668%
Unconsolidated Joint Venture Other Property [Member] | Other [Member]
Schedule of Equity Method Investments [Line Items]
Carrying Amount	[19]					$ 811			$ 3,506
[1]	The construction/permanent loan has a maximum borrowing amount of $192,000.
[2]	The mortgage loan has three one-year extension options, subject to certain conditions.
[3]	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.
[4]	Company's effective ownership % represents the Company's entitlement to residual distributions after payments of priority returns, where applicable.
[5]	Through the joint venture, the Company also owns a 12.5 percent interest in a 50,973 square feet 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").
[6]	Property debt balance consists of: (i) an amortizable loan, collateralized by the Metropolitan at 40 Park, with a balance of $37,836, bears interest at 3.25 percent, matures in September 2020; (ii) an amortizable loan, collateralized by the Shops at 40 Park, with a balance of $6,354, bears interest at 3.63 percent, matures in August 2018.
[7]	During the second quarter 2016, the Company acquired the equity interests of its joint venture partner in Portside Apartment Holdings, L.L.C and PruRose Riverwalk G, L.L.C. for $39.6 million and $11.3 million, respectively, which increased its ownership to 100 percent in Portside Apartment Holdings, LLC and 50 percent in Riverwalk G Urban Renewal, L.L.C. (See Note 3: Recent Transactions - Acquisitions).
[8]	The loan was refinanced in October 2016. The new $82 million loan matures in October 2026 and has an interest rate of 3.21 percent.
[9]	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.
[10]	The Company also owns a 20 percent residual interest in undeveloped land parcels: parcels 6, I, and J that can accommodate the development of 836 apartment units.
[11]	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.
[12]	The Company's equity interests in the joint ventures will be subordinated to Keystone Entities receiving a 15 percent internal rate of return ("IRR") after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.
[13]	Principal balance of $127,538 bears interest at 5.114 percent and matures on August 27, 2023; principal balance of $45,500 bears interest at 5.01 percent and matures on September 6, 2025; principal balance of $17,911 bears interest at 8.0 percent and matures on October 31, 2016; principal balance of $22,500 bears interest at LIBOR+5.2 percent t and matures on August 31, 2019; principal balance of $11,250 bears interest at LIBOR+5.5 percent and matures on January 9, 2019; principal balance of $10,425 bears interest at LIBOR+6.0 percent matures on August 27, 2017.
[14]	Includes the Company's pari-passu interests of $2.8 million in five properties and Company's subordinated equity interests to Keystone Entities receiving a 15 percent internal rate of return ("IRR") after which the Company will receive a 10 percent IRR on its subordinate equity and then all profit will be split equally.
[15]	Principal balance of $47,500 bears interest at 5.38 percent and matures on July 1, 2017; principal balance of $78,121 bears interest at rates ranging from 5.65 percent to 6.75 percent and matures on September 9, 2017; principal balance of $14,250 bears interest at 4.88 percent and matures on July 6, 2024; principal balance of $63,400 bears interest at 4.93 percent and matures on July 6, 2044; principal balance of $15,050 bears interest at 4.71 percent and matures on August 6, 2044.
[16]	Includes undivided interests in the same manner as investments in noncontrolling partnership, pursuant to ASC 970-323-25-12.
[17]	See Note 10: Mortgages, Loans Payable and Other Obligations for debt secured by interests in these assets.
[18]	The negative carrying value for this venture of $3,317 as of December 31, 2015, was included in accounts payable, accrued expenses and other liabilities.
[19]	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.

Investments In Unconsolidated56

Investments In Unconsolidated Joint Ventures (Summary Of Company's Equity In Earnings (Loss) Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	$ 21,790	$ 3,135	$ 19,622	$ (2,723)
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	22,447	1,151	23,267	1,934
Other [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(657)	1,984	(3,645)	(4,657)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Marbella RoseGarden, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	76	64	208	186
Unconsolidated Joint Venture Multi-Family Properties [Member] | RoseGarden Monaco Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(277)	(295)	(869)	(924)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Rosewood Morristown, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(76)	(93)	(239)	(277)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Riverwalk G Urban Renewal, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(594)	(151)	(1,189)	(681)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Elmajo Urban Renewal Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures
Unconsolidated Joint Venture Multi-Family Properties [Member] | Crystal House Apartments Investors LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(99)	(44)	(321)	(41)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Roseland/Port Imperial Partners, L.P. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(36)	(85)	(36)	(394)
Unconsolidated Joint Venture Multi-Family Properties [Member] | RoseGarden Marbella South, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	105		(202)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Estuary Urban Renewal Unit B, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures
Unconsolidated Joint Venture Multi-Family Properties [Member] | Riverpark At Harrison I, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(43)	(54)	(173)	(377)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Capitol Place Mezz LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(500)	(1,454)	(1,995)	(2,642)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Harborside Unit A Urban Renewal, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(42)		(60)
Unconsolidated Joint Venture Multi-Family Properties [Member] | RoseGarden Monaco, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures
Unconsolidated Joint Venture Multi-Family Properties [Member] | Grand Jersey Waterfront URA, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures		(12)	(60)	(32)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Hillsborough 206 Holdings, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(22)		(53)	(5)
Unconsolidated Joint Venture Multi-Family Properties [Member] | Plaza VIII & IX Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	81	102	256	258
Unconsolidated Joint Venture Office Buildings [Member] | Red Bank Corporate Plaza, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	111	110	321	332
Unconsolidated Joint Venture Office Buildings [Member] | 12 Vreeland Associates, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	74	38	266	110
Unconsolidated Joint Venture Office Buildings [Member] | BNES Associates III [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	109	13	(68)	133
Unconsolidated Joint Venture Office Buildings [Member] | KPG-P 100 IMW JV, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures		(37)		(800)
Unconsolidated Joint Venture Office Buildings [Member] | Keystone-Penn [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	150	3,663	450	3,663
Unconsolidated Joint Venture Office Buildings [Member] | Keystone-TriState [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(518)	(173)	(1,186)	(1,763)
Unconsolidated Joint Venture Office Buildings [Member] | KPG-MCG Curtis JV, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	113	327	518	755
Unconsolidated Joint Venture Other Property [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	21,790	3,135	19,622	(2,723)
Unconsolidated Joint Venture Other Property [Member] | Roseland/North Retail, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	(14)	(17)	(39)	(52)
Unconsolidated Joint Venture Other Property [Member] | South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	22,447	1,151	23,267	1,934
Unconsolidated Joint Venture Other Property [Member] | Other [Member]
Schedule of Equity Method Investments [Line Items]
Company's equity in earnings of unconsolidated joint ventures	$ 745	$ 82	$ 826	$ (2,106)

Investments In Unconsolidated57

Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Rental property, net	$ 1,725,663	$ 1,781,621
Other assets	268,233	307,000
Total assets	1,993,896	2,088,621
Mortgages and loans payable	1,335,918	1,298,293
Other liabilities	231,071	215,951
Partners'/members' capital	426,907	574,377
Total liabilities and partners'/members' capital	1,993,896	2,088,621
Company's net investment in unconsolidated joint ventures	319,807	303,457
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Rental property, net	41,161	44,925
Other assets	17,959	15,249
Total assets	59,120	60,174
Mortgages and loans payable	100,000	63,741
Other liabilities	4,985	5,481
Partners'/members' capital	(45,865)	(9,048)
Total liabilities and partners'/members' capital	59,120	60,174
Other [Member]
Schedule of Equity Method Investments [Line Items]
Rental property, net	1,684,502	1,736,696
Other assets	250,274	291,751
Total assets	1,934,776	2,028,447
Mortgages and loans payable	1,235,918	1,234,552
Other liabilities	226,086	210,470
Partners'/members' capital	472,772	583,425
Total liabilities and partners'/members' capital	1,934,776	2,028,447
Company's net investment in unconsolidated joint ventures	$ 319,807	$ 303,457

Investments In Unconsolidated58

Investments In Unconsolidated Joint Ventures (Summary Of Results Of Operations Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 90,070	$ 82,586	$ 254,385	$ 238,138
Operating and other expenses	(63,659)	(55,969)	(174,676)	(169,278)
Depreciation and amortization	(16,324)	(16,823)	(52,090)	(51,632)
Interest expense	(13,272)	(14,622)	(40,736)	(39,280)
Net income	(3,185)	(4,828)	(13,117)	(22,052)
Company's equity in earnings of unconsolidated joint ventures	21,790	3,135	19,622	(2,723)
South Pier At Harborside [Member]
Schedule of Equity Method Investments [Line Items]
Total revenues	11,262	12,390	30,973	31,815
Operating and other expenses	(7,248)	(7,580)	(20,356)	(20,306)
Depreciation and amortization	(1,499)	(1,501)	(4,478)	(4,589)
Interest expense	(1,036)	(1,008)	(3,020)	(3,051)
Net income	1,479	2,301	3,119	3,869
Company's equity in earnings of unconsolidated joint ventures	22,447	1,151	23,267	1,934
Other [Member]
Schedule of Equity Method Investments [Line Items]
Total revenues	78,808	70,196	223,412	206,323
Operating and other expenses	(56,411)	(48,389)	(154,320)	(148,972)
Depreciation and amortization	(14,825)	(15,322)	(47,612)	(47,043)
Interest expense	(12,236)	(13,614)	(37,716)	(36,229)
Net income	(4,664)	(7,129)	(16,236)	(25,921)
Company's equity in earnings of unconsolidated joint ventures	$ (657)	$ 1,984	$ (3,645)	$ (4,657)

Deferred Charges, Goodwill An59

Deferred Charges, Goodwill And Other Assets, Net (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Credit Risk Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net liability	$ 8,000,000		$ 8,000,000
Settlement obligation	8,000,000		8,000,000
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	350,000,000		350,000,000
Ineffective increase to interest expense	1,012,000		0
Estimated additional amount to be reclassified to interest expense			2,700,000
Not Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of increase in the fair value of derivatives	$ 0	$ 12,000	$ 2,000	$ 92,000

Deferred Charges, Goodwill An60

Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Deferred Charges, Goodwill And Other Assets [Line Items]
Deferred leasing costs		$ 230,718	$ 239,690
Deferred financing costs - revolving credit facility	[1]	5,359	5,394
Deferred charges, gross		236,077	245,084
Accumulated amortization		(107,982)	(118,014)
Deferred charges, net		128,095	127,070
Notes receivable	[2]	13,313	13,496
In-place lease values, related intangibles and other assets, net		77,656	10,931
Goodwill	[3]	2,945	2,945
Prepaid expenses and other assets, net	[4]	81,645	49,408
Total deferred charges, goodwill and other assets, net		303,654	$ 203,850
Acquisition-related Costs [Member]
Deferred Charges, Goodwill And Other Assets [Line Items]
Net sales proceeds held by qualified intermediary		39,000
Mortgage Receivable [Member]
Deferred Charges, Goodwill And Other Assets [Line Items]
Notes receivable		$ 10,400
Spread over LIBOR		6.00%
LIBOR		Libor+6
Mortgage loan, maturity date		Aug. 1, 2017
Interest-Free Notes Receivable [Member]
Deferred Charges, Goodwill And Other Assets [Line Items]
Notes receivable		$ 2,900
Mortgage loan, maturity date		Apr. 1, 2023
[1]	Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the revolving credit facility) are classified to net against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies - Deferred Financing Costs.
[2]	Includes as of September 30, 2016: a mortgage receivable for $10.4 million which bears interest at LIBOR plus six percent and matures in August 2017; and an interest-free note receivable with a net present value of $2.9 million and matures in April 2023. The Company believes these balances are fully collectible.
[3]	All goodwill is attributable to the Company's Multi-family Services segment.
[4]	Includes as of September 30, 2016, $39.0 million of proceeds from property sales held by a qualified intermediary.

Deferred Charges, Goodwill An61

Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Fair Value Of The Derivative Financial Instruments) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Accounts Payable, Accrued Expenses And Other Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Liability Derivatives	$ 7,528
Not Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] | Deferred Charges, Goodwill And Other Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Asset Derivatives		$ 2

Deferred Charges, Goodwill An62

Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Cash Flow Hedging, Derivative Financial Instruments On The Income Statement) (Details) - Not Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		$ 2,600
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	$ 866	$ (10,128)
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	860
Interest Rate Swap [Member] | Interest And Other Investment Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion, Reclassification for Forecasted Transactions No Longer Probable of Occurring and Amount Excluded from Effectiveness Testing)	$ 1,012

Restricted Cash (Details)

Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Restricted Cash [Abstract]
Security deposits	$ 8,872	$ 7,785
Escrow and other reserve funds	45,912	27,558
Total restricted cash	$ 54,784	$ 35,343

Senior Unsecured Notes (Details

Senior Unsecured Notes (Details) - USD ($)		Sep. 19, 2016	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Principal balance outstanding			$ 2,455,309,000	$ 2,455,309,000	$ 2,145,393,000
Loss from extinguishment of debt, net			19,302,000	6,882,000
Total senior unsecured notes, net			$ 2,474,148,000	2,474,148,000	2,154,920,000
Repayments of senior unsecured notes				$ 314,755,000
5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]
Debt Instrument [Line Items]
Interest rate of senior unsecured notes			5.80%	5.80%
Maturity date of the senior unsecured notes				Jan. 15, 2016
2.500% Senior Unsecured Notes Due December 15, 2017 [Member]
Debt Instrument [Line Items]
Interest rate of senior unsecured notes			2.50%	2.50%
Maturity date of the senior unsecured notes				Dec. 15, 2017
7.750% Senior Unsecured Notes, Due August 15, 2019 [Member]
Debt Instrument [Line Items]
Interest rate of senior unsecured notes			7.75%	7.75%
Maturity date of the senior unsecured notes				Aug. 15, 2019
4.500% Senior Unsecured Notes Due April 18, 2022 [Member]
Debt Instrument [Line Items]
Interest rate of senior unsecured notes			4.50%	4.50%
Maturity date of the senior unsecured notes				Apr. 18, 2022
3.150% Senior Unsecured Notes, Due May 15, 2023 [Member]
Debt Instrument [Line Items]
Interest rate of senior unsecured notes			3.15%	3.15%
Maturity date of the senior unsecured notes				May 15, 2023
Unsecured Note [Member]
Debt Instrument [Line Items]
Principal balance outstanding			$ 960,136,000	$ 960,136,000	1,275,000,000
Adjustment for unamortized debt discount			(5,013,000)	(5,013,000)	(6,156,000)
Unamortized deferred financing costs			(3,848,000)	(3,848,000)	(5,062,000)
Loss from extinguishment of debt, net			19,300,000	19,300,000
Total senior unsecured notes, net			951,275,000	951,275,000	1,263,782,000
Face amount of senior unsecured notes		$ 114,900,000
Redemption percentage of notes		115.977%
Repayments of senior unsecured notes		$ 134,100,000
Unsecured Note [Member] | 5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]
Debt Instrument [Line Items]
Principal balance outstanding			$ 200,000,000	$ 200,000,000	200,000,000	[1]
Effective rate	[1],[2]		5.806%	5.806%
Interest rate of senior unsecured notes			5.80%	5.80%
Maturity date of the senior unsecured notes				Jan. 15, 2016
Unsecured Note [Member] | 2.500% Senior Unsecured Notes Due December 15, 2017 [Member]
Debt Instrument [Line Items]
Principal balance outstanding			$ 250,000,000	$ 250,000,000	250,000,000
Effective rate	[2]		2.803%	2.803%
Unsecured Note [Member] | 7.750% Senior Unsecured Notes, Due August 15, 2019 [Member]
Debt Instrument [Line Items]
Principal balance outstanding	[3]		$ 135,136,000	$ 135,136,000	250,000,000
Effective rate	[2],[3]		8.017%	8.017%
Unsecured Note [Member] | 4.500% Senior Unsecured Notes Due April 18, 2022 [Member]
Debt Instrument [Line Items]
Principal balance outstanding			$ 300,000,000	$ 300,000,000	300,000,000
Effective rate	[2]		4.612%	4.612%
Unsecured Note [Member] | 3.150% Senior Unsecured Notes, Due May 15, 2023 [Member]
Debt Instrument [Line Items]
Principal balance outstanding			$ 275,000,000	$ 275,000,000	$ 275,000,000
Effective rate	[2]		3.517%	3.517%
[1]	On January 15, 2016, the Company repaid these notes at their maturity using proceeds from a new unsecured term loan and borrowings under the Company's 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.
[3]	On September 19, 2016, the Company purchased $114.9 million principal amount of these notes pursuant to its tender offer. See summary above.

Unsecured Term Loan (Narrative)

Unsecured Term Loan (Narrative) (Details)	9 Months Ended
	Sep. 30, 2016USD ($)item	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Unsecured term loan, net	$ 347,830,000
Loan balance	2,455,309,000	$ 2,145,393,000
Unsecured Note [Member]
Debt Instrument [Line Items]
Loan balance	960,136,000	1,275,000,000
Unamortized deferred financing costs	$ 3,848,000	5,062,000
Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Loan maturity date	Jan. 1, 2019
Unamortized deferred financing costs	$ 2,170,000	0
Number of extension options | item	2
Loan extension period	1 year
Spread over LIBOR	1.40%
Interest rate	3.13%
Terms of the unsecured facility	The terms of the unsecured term loan 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 term loan described below, or (ii) the property dispositions are completed while the Company is under an event of default under the term loan, 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 General Partner to continue to qualify as a REIT under the Code. The Company was in compliance with its debt covenants under its unsecured term loan as of September 30, 2016.
Leverage ratio	60.00%
Secured indebtedness	40.00%
Fixed charge coverage ratio | item	1.5
Investment limitations as a percentage of total capitalization	15.00%
Unsecured Term Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Unencumbered property interest coverage | item	2
Unsecured Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unsecured indebtedness	60.00%
5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]
Debt Instrument [Line Items]
Loan maturity date	Jan. 15, 2016
Interest rate	5.80%
5.800% Senior Unsecured Notes, Due January 15, 2016 [Member] | Unsecured Note [Member]
Debt Instrument [Line Items]
Loan balance	$ 200,000,000	$ 200,000,000	[1]
Loan maturity date	Jan. 15, 2016
Interest rate	5.80%
[1]	On January 15, 2016, the Company repaid these notes at their maturity using proceeds from a new unsecured term loan and borrowings under the Company's unsecured revolving credit facility.

Unsecured Term Loan (Schedule O

Unsecured Term Loan (Schedule Of Interest Rate On Outstanding Borrowings Payable) (Details)	9 Months Ended
	Sep. 30, 2016
Unsecured Term Loan [Member]
Line of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	1.40%
No Ratings Or Less Than Baa3 [Member] | No Ratings Or Less Than BBB- [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	No ratings or less than BBB-/Baa3
No Ratings Or Less Than Baa3 [Member] | Unsecured Term Loan [Member] | No Ratings Or Less Than BBB- [Member]
Line of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	1.85%
Baa3 [Member] | BBB- [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB- or Baa3 (current interest rate based on Company's election)
Baa3 [Member] | Unsecured Term Loan [Member] | BBB- [Member]
Line of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	1.40%
Baa2 [Member] | BBB [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB or Baa2
Baa2 [Member] | Unsecured Term Loan [Member] | BBB [Member]
Line of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	1.15%
Baa1 [Member] | BBB+ [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB+ or Baa1
Baa1 [Member] | Unsecured Term Loan [Member] | BBB+ [Member]
Line of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	1.00%
A3 Or Higher [Member] | A- Or Higher [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	A- or A3 or higher
A3 Or Higher [Member] | Unsecured Term Loan [Member] | A- Or Higher [Member]
Line of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	0.90%

Unsecured Term Loan (Schedule67

Unsecured Term Loan (Schedule Of Defined Leverage Ratio) (Details)	9 Months Ended
	Sep. 30, 2016
45% Unsecured Term Loan Leverage Ratio [Member]
Debt Instrument [Line Items]
Spread over LIBOR	1.45%
45% Unsecured Term Loan Leverage Ratio [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio	45.00%
45% And 50% Unsecured Term Loan Leverage Ratio [Member]
Debt Instrument [Line Items]
Spread over LIBOR	1.55%
45% And 50% Unsecured Term Loan Leverage Ratio [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio	45.00%
45% And 50% Unsecured Term Loan Leverage Ratio [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio	50.00%
50% And 55% Unsecured Term Loan Leverage Ratio [Member]
Debt Instrument [Line Items]
Spread over LIBOR	1.65%
50% And 55% Unsecured Term Loan Leverage Ratio [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio	50.00%
50% And 55% Unsecured Term Loan Leverage Ratio [Member] | Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio	55.00%
55% Unsecured Term Loan Leverage Ratio [Member]
Debt Instrument [Line Items]
Spread over LIBOR	1.95%
55% Unsecured Term Loan Leverage Ratio [Member] | Minimum [Member]
Debt Instrument [Line Items]
Leverage ratio	55.00%

Unsecured Revolving Credit Fa68

Unsecured Revolving Credit Facility (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)itementity	Dec. 31, 2015USD ($)
Line of Credit Facility [Line Items]
Outstanding borrowings under the facility	$ 95,000	$ 155,000
Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Number of lending institutions | entity	17
Borrowing capacity under the credit facility	$ 600,000
Expandable borrowing capacity under the credit facility	$ 1,000,000
Credit facility maturity date	Jul. 1, 2017
Number of extension options | item	2
Credit facility, extension period	6 months
Line of credit facility, bid feature, current borrowing capacity	$ 300,000
Terms of the unsecured facility	The terms of the unsecured facility include certain restrictions and covenants which limit, among other things the incurrence of additional indebtedness, the incurrence of liens and the disposition of real estate properties (to the extent that: (i) such property dispositions cause the Company to default on any of the financial ratios of the facility described below, or (ii) the property dispositions are completed while the Company is under an event of default under the facility, unless, under certain circumstances, such disposition is being carried out to cure such default), and which require compliance with financial ratios relating to the maximum leverage ratio (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 General Partner to continue to qualify as a REIT under the Code. The Company was in compliance with its debt covenants under its revolving credit facility as of September 30, 2016.
Outstanding borrowings under the facility	$ 95,000	$ 155,000
Unsecured Revolving Credit Facility Extension 1 [Member]
Line of Credit Facility [Line Items]
Credit facility extension fee, basis points	0.075%
Unsecured Revolving Credit Facility Extension 2 [Member]
Line of Credit Facility [Line Items]
Credit facility extension fee, basis points	0.075%
Minimum [Member] | Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Fixed charge coverage ratio | item	1.5
Unencumbered property interest coverage | item	2
Maximum [Member] | Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Leverage ratio	60.00%
Secured indebtedness	40.00%
Unsecured indebtedness	60.00%
Investment limitations as a percentage of total capitalization	15.00%

Unsecured Revolving Credit Fa69

Unsecured Revolving Credit Facility (Schedule Of Unsecured Credit Rating And Facility Fee) (Details)	9 Months Ended
	Sep. 30, 2016
No Ratings Or Less Than Baa3 [Member] | No Ratings Or Less Than BBB- [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	No ratings or less than BBB-/Baa3
Baa3 [Member] | BBB- [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB- or Baa3 (current interest rate based on Company's election)
Baa2 [Member] | BBB [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB or Baa2
Baa1 [Member] | BBB+ [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB+ or Baa1
A3 Or Higher [Member] | A- Or Higher [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	A- or A3 or higher
Unsecured Revolving Credit Facility [Member] | No Ratings Or Less Than Baa3 [Member] | No Ratings Or Less Than BBB- [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%
Unsecured Revolving Credit Facility [Member] | Baa3 [Member] | BBB- [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB- or Baa3 (current)
Interest Rate - Applicable Basis Points Above LIBOR	1.30%
Facility Fee Basis Points	0.30%
Unsecured Revolving Credit Facility [Member] | Baa2 [Member] | BBB [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	BBB or Baa2
Interest Rate - Applicable Basis Points Above LIBOR	1.10%
Facility Fee Basis Points	0.20%
Unsecured Revolving Credit Facility [Member] | Baa1 [Member] | BBB+ [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%
Unsecured Revolving Credit Facility [Member] | A3 Or Higher [Member] | A- Or Higher [Member]
Line of Credit Facility [Line Items]
Unsecured Debt Ratings	A- or A3 or higher
Interest Rate - Applicable Basis Points Above LIBOR	0.925%
Facility Fee Basis Points	0.125%

Mortgages, Loans Payable And 70

Mortgages, Loans Payable And Other Obligations (Narrative) (Details)	9 Months Ended
	Sep. 30, 2016USD ($)property	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Number of properties with encumbered company mortgages | property	21
Carrying value of encumbered properties	$ 1,200,000,000
Cash paid for interest	89,617,000	$ 85,019,000
Interest capitalized	14,436,000	11,744,000
Total indebtedness	$ 2,474,148,000		$ 2,154,920,000
Total indebtedness, weighted average interest rate	4.48%		5.22%
Projects Under Development And Developable Land [Member]
Debt Instrument [Line Items]
Number of properties with encumbered company mortgages | property	3
Other Property [Member]
Debt Instrument [Line Items]
Carrying value of encumbered properties	$ 146,000,000
Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]
Debt Instrument [Line Items]
Total indebtedness	$ 261,706,000		$ 292,399,000
Total indebtedness, weighted average interest rate	3.75%		2.81%
Fixed Rate Debt And Other Obligations [Member]
Debt Instrument [Line Items]
Total indebtedness	$ 2,212,442,000		$ 1,862,521,000
Total indebtedness, weighted average interest rate	4.56%		5.60%
Unconsolidated Joint Venture [Member]
Debt Instrument [Line Items]
Interest capitalized	$ 3,937,000	$ 3,769,000

Mortgages, Loans Payable And 71

Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details)		May 05, 2016USD ($)	Apr. 22, 2016USD ($)	Sep. 30, 2016USD ($)propertyitem		Sep. 30, 2015USD ($)	Jul. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Principal balance outstanding				$ 2,455,309,000				$ 2,145,393,000
Repayment of mortgages, loans payable and other obligations				187,969,000		$ 29,307,000
Loss from extinguishment of debt, net				$ 12,420,000
Minimum [Member]
Debt Instrument [Line Items]
Percentage of interest in venture				7.50%
Maximum [Member]
Debt Instrument [Line Items]
Percentage of interest in venture				85.00%
Port Imperial 4/5 Hotel [Member] | Construction Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 94,000,000
Secured Debt [Member]
Debt Instrument [Line Items]
Principal balance outstanding				1,069,012,000				731,624,000
Adjustment for unamortized debt discount								(548,000)
Unamortized deferred financing costs				(7,808,000)				(4,465,000)
Total mortgages, loans payable and other obligations, net				$ 1,061,204,000				726,611,000
Secured Debt [Member] | Port Imperial South [Member]
Debt Instrument [Line Items]
Property Name	[1]			Port Imperial South
Lender	[1]			Wells Fargo Bank N.A.
LIBOR	[1],[2]			LIBOR+1.75
Spread over LIBOR				1.75%
Principal balance outstanding	[1]							34,962,000
Secured Debt [Member] | 6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]
Debt Instrument [Line Items]
Property Name	[3]			6 Becker, 85 Livingston, 75 Livingston & 20 Waterview
Lender	[3]			Wells Fargo CMBS
Effective rate	[2],[3]			10.26%
Principal balance outstanding	[3]							63,279,000
Repayment of mortgages, loans payable and other obligations			$ 51,500,000
Loss from extinguishment of debt, net			$ 12,400,000
Secured Debt [Member] | 9200 Edmonston Road [Member]
Debt Instrument [Line Items]
Property Name	[4]			9200 Edmonston Road
Lender	[4]			Principal Commercial Funding L.L.C.
Effective rate	[2],[4]			9.78%
Principal balance outstanding	[4]							3,793,000
Gain on sale		$ 200,000
Secured Debt [Member] | 4 Becker [Member]
Debt Instrument [Line Items]
Property Name				4 Becker
Lender				Wells Fargo CMBS
Effective rate	[2]			11.26%
Principal balance outstanding				$ 40,180,000				40,631,000
Loan maturity date	[5]			May 11, 2016
Secured Debt [Member] | Various [Member]
Debt Instrument [Line Items]
Property Name	[6]			Various
Lender	[6]			Prudential Insurance
Effective rate	[2],[6]			6.332%
Principal balance outstanding	[6]			$ 141,894,000				143,513,000
Loan maturity date	[6]			Jan. 15, 2017
Number of properties used to collateralized mortgage | property				7
Repayment of mortgages, loans payable and other obligations				$ 61,100,000
Secured Debt [Member] | 150 Main St [Member]
Debt Instrument [Line Items]
Property Name	[7]			150 Main St.
Lender	[7]			Webster Bank
LIBOR	[2],[7]			LIBOR+2.35
Spread over LIBOR				2.35%
Principal balance outstanding	[7]			$ 25,159,000				10,937,000
Loan maturity date	[7]			Mar. 30, 2017
Secured Debt [Member] | 150 Main St [Member] | Construction Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 28,800,000
Secured Debt [Member] | Curtis Center [Member]
Debt Instrument [Line Items]
Property Name	[8]			Curtis Center
Lender	[8]			CCRE & PREFG
LIBOR	[2],[8],[9]			LIBOR+5.912
Spread over LIBOR	[9]			5.912%
Principal balance outstanding	[8]			$ 75,000,000				64,000,000
Loan maturity date	[8]			Oct. 9, 2017
Percentage of interest in venture				50.00%
Number of extension options | item				3
Loan extension period				1 year
Deferred financing costs amortization interest rate				1.362%
Secured Debt [Member] | Curtis Center [Member] | Senior Loan [Member]
Debt Instrument [Line Items]
Effective rate				3.8191%
Spread over LIBOR				3.29%
Principal balance outstanding				$ 102,000,000
Percentage of interest in venture				50.00%
LIBOR measurement period				1 month
Secured Debt [Member] | Curtis Center [Member] | Mezzanine Loan [Member]
Debt Instrument [Line Items]
Effective rate				10.025%
Spread over LIBOR				9.50%
Principal balance outstanding				$ 48,000,000
Percentage of interest in venture				50.00%
LIBOR measurement period				1 month
Secured Debt [Member] | 23 Main Street [Member]
Debt Instrument [Line Items]
Property Name				23 Main Street
Lender				JPMorgan CMBS
Effective rate	[2]			5.587%
Principal balance outstanding				$ 28,020,000				28,541,000
Loan maturity date				Sep. 1, 2018
Secured Debt [Member] | Port Imperial 4/5 Hotel [Member]
Debt Instrument [Line Items]
Property Name	[10]			Port Imperial 4/5 Hotel
Lender	[10]			Fifth Third Bank & Santander
LIBOR	[2],[10]			LIBOR+4.50
Spread over LIBOR				4.50%
Principal balance outstanding	[10]			$ 8,311,000
Loan maturity date	[10]			Oct. 6, 2018
Secured Debt [Member] | Harborside Plaza 5 [Member]
Debt Instrument [Line Items]
Property Name				Harborside Plaza 5
Lender				The Northwestern Mutual Life Insurance Co. & New York Life Insurance Co.
Effective rate	[2]			6.842%
Principal balance outstanding				$ 214,690,000				217,736,000
Loan maturity date				Nov. 1, 2018
Secured Debt [Member] | Chase II Project [Member]
Debt Instrument [Line Items]
Property Name	[11]			Chase II
Lender	[11]			Fifth Third Bank
LIBOR	[2],[11]			LIBOR+2.25
Spread over LIBOR				2.25%
Principal balance outstanding	[11]			$ 23,599,000
Loan maturity date	[11]			Dec. 15, 2018
Secured Debt [Member] | Chase II Project [Member] | Construction Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 48,000,000
Secured Debt [Member] | 100 Walnut Avenue [Member]
Debt Instrument [Line Items]
Property Name				100 Walnut Avenue
Lender				Guardian Life Insurance Co.
Effective rate	[2]			7.311%
Principal balance outstanding				$ 18,058,000				18,273,000
Loan maturity date				Feb. 1, 2019
Secured Debt [Member] | One River Center [Member]
Debt Instrument [Line Items]
Property Name	[12]			One River Center
Lender	[12]			Guardian Life Insurance Co.
Effective rate	[2],[12]			7.311%
Principal balance outstanding	[12]			$ 41,367,000				41,859,000
Loan maturity date	[12]			Feb. 1, 2019
Number of properties used to collateralized mortgage | property				3
Secured Debt [Member] | Park Square [Member]
Debt Instrument [Line Items]
Property Name				Park Square
Lender				Wells Fargo Bank N.A.
LIBOR	[2],[13]			LIBOR+1.872
Spread over LIBOR	[13]			1.872%
Principal balance outstanding				$ 27,500,000				27,500,000
Loan maturity date				Apr. 10, 2019
Deferred financing costs amortization interest rate				0.122%
Secured Debt [Member] | Port Imperial South 11 [Member]
Debt Instrument [Line Items]
Property Name	[14]			Port Imperial South 11
Lender	[14]			JPMorgan Chase
LIBOR	[2],[14]			LIBOR+2.35
Spread over LIBOR				2.35%
Principal balance outstanding	[14]			$ 7,136,000
Loan maturity date	[14]			Nov. 24, 2019
Secured Debt [Member] | Port Imperial South 11 [Member] | Construction Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 78,000,000
Secured Debt [Member] | Port Imperial South 4/5 Retail [Member]
Debt Instrument [Line Items]
Property Name				Port Imperial South 4/5 Retail
Lender				American General Life & A/G PC
Effective rate	[2]			4.559%
Principal balance outstanding				$ 4,000,000				4,000,000
Loan maturity date				Dec. 1, 2021
Secured Debt [Member] | The Chase At Overlook Ridge [Member]
Debt Instrument [Line Items]
Property Name				The Chase at Overlook Ridge
Lender				New York Community Bank
Effective rate	[2]			3.74%
Principal balance outstanding				$ 72,500,000
Loan maturity date				Feb. 1, 2023
Secured Debt [Member] | Portside 7 [Member]
Debt Instrument [Line Items]
Property Name	[15]			Portside 7
Lender	[15]			CBRE Capital Markets/FreddieMac
Effective rate	[2],[15]			3.569%
Principal balance outstanding				$ 58,998,000	[15]		$ 42,500,000
Loan maturity date	[15]			Aug. 1, 2023
Secured Debt [Member] | 101 Hudson Street [Member]
Debt Instrument [Line Items]
Property Name	[16]			101 Hudson
Lender	[16]			Wells Fargo CMBS
Effective rate	[2],[16],[17]			3.197%
Principal balance outstanding	[16]			$ 250,000,000
Loan maturity date	[16]			Oct. 11, 2026
Secured Debt [Member] | 101 Hudson Street [Member] | Construction Loan [Member]
Debt Instrument [Line Items]
Deferred financing costs amortization interest rate				0.0798%
Secured Debt [Member] | 101 Hudson Street - In Escrow [Member]
Debt Instrument [Line Items]
Principal balance outstanding				$ 19,200,000
Secured Debt [Member] | Port Imperial 4/5 Garage Development [Member]
Debt Instrument [Line Items]
Property Name				Port Imperial South 4/5 Garage
Lender				American General Life & A/G PC
Effective rate	[2]			4.853%
Principal balance outstanding				$ 32,600,000				$ 32,600,000
Loan maturity date				Dec. 1, 2029
[1]	On January 19, 2016, the loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.
[2]	Reflects effective rate of debt, including deferred financing costs, comprised of the cost of terminated treasury lock agreements (if any), debt initiation costs, mark-to-market adjustment of acquired debt and other transaction costs, as applicable.
[3]	On April 22, 2016, the loan was repaid at a discount for $51.5 million, using borrowings from the Company's revolving credit facility. Accordingly, the Company recognized a gain on extinguishment of debt of $12.4 million, which is included in loss on extinguishment of debt, net.
[4]	On May 5, 2016, the Company transferred the deed for 9200 Edmonston Road to the lender in satisfaction of its obligations and recorded a gain of $0.2 million.
[5]	The Company has begun discussions with the lender regarding the past due maturity of the loan.
[6]	Mortgage is cross collateralized by seven properties. The Company has agreed, subject to certain conditions, to guarantee repayment of $61.1 million of the loan.
[7]	This construction loan has a maximum borrowing capacity of $28.8 million.
[8]	The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company's $75 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.8191 percent at September 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.025 percent at September 30, 2016. The senior loan rate is based on a floating rate of one-month LIBOR plus 329 basis points and the mezzanine loan rate is based on a floating rate of one-month LIBOR plus 950 basis points. The Company has entered into LIBOR caps for the periods of the loans. In October 2016, the first of three one-year extension options was exercised by the venture.
[9]	The effective interest rate includes amortization of deferred financing costs of 1.362 percent.
[10]	This construction loan has a maximum borrowing capacity of $94 million.
[11]	This construction loan has a maximum borrowing capacity of $48 million.
[12]	Mortgage is collateralized by the three properties comprising One River Center.
[13]	The effective interest rate includes amortization of deferred financing costs of 0.122 percent.
[14]	This constuction loan has a maximum borrowing capacity of $78 million.
[15]	This mortgage loan was obtained by the Company in July 2016 to replace a $42.5 million mortgage loan that was in place at the property acquisition date of April 1, 2016.
[16]	This mortgage loan was obtained by the Company on September 30, 2016. $19.2 million of the mortgage loan principal was placed in escrow accounts directly by the lender at the loan closing.
[17]	The effective interest rate includes amortization of deferred financing costs of 0.0798 percent.

Employee Benefit 401(k) Plans (

Employee Benefit 401(k) Plans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
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	$ 254,000	$ 0	$ 746,000	$ 0
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

Disclosure Of Fair Value Of A73

Disclosure Of Fair Value Of Assets And Liabilities (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Disclosure Of Fair Value Of Assets And Liabilities [Abstract]
Fair value of Company's long-term debt	$ 2,483,897,000	$ 2,150,507,000
Principal balance outstanding	$ 2,455,309,000	$ 2,145,393,000

Disclosure Of Fair Value Of A74

Disclosure Of Fair Value Of Assets And Liabilities (Schedule Of Valuation Techniques And Significant Unobservable Inputs) (Details) - Level 3 [Member] - Discounted Cash Flow [Member]	9 Months Ended
	Sep. 30, 2015USD ($)
Discount Rate [Member] | Suburban [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 438,606,000
Discount Rate [Member] | Suburban [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	8.00%
Discount Rate [Member] | Suburban [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	15.00%
Discount Rate [Member] | Central Business District [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	6.00%
Discount Rate [Member] | Central Business District [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	8.00%
Exit Capitalization Rate [Member] | Suburban [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	7.50%
Exit Capitalization Rate [Member] | Suburban [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	9.00%
Exit Capitalization Rate [Member] | Central Business District [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	4.60%
Exit Capitalization Rate [Member] | Central Business District [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	5.75%

Commitments And Contingencies75

Commitments And Contingencies (Tax Abatement Agreements) (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		16 Months Ended	60 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Apr. 30, 2017	Apr. 30, 2022
Harborside 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)	$ 279,000	$ 247,000	$ 798,000	$ 742,000
Harborside 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)	1,100,000	$ 854,000	$ 2,900,000	$ 2,600,000
Port Imperial South 4/5 Garage [Member]
Commitments And Contingencies [Line Items]
Project period			5 years
Port Imperial South 4/5 Garage [Member] | Tax Year 1 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			0.00%
Port Imperial South 4/5 Garage [Member] | Tax Year 2 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			80.00%
Port Imperial South 4/5 Garage [Member] | Tax Year 3 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			80.00%
Port Imperial South 4/5 Garage [Member] | Tax Year 4 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			80.00%
Port Imperial South 4/5 Garage [Member] | Tax Year 5 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			80.00%
Port Imperial South 1/3 Garage [Member]
Commitments And Contingencies [Line Items]
Project period			5 years
Percentage of taxes paid based on the land value			100.00%
Port Imperial South 1/3 Garage [Member] | Tax Year 1 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			0.00%
Port Imperial South 1/3 Garage [Member] | Tax Year 2 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			95.00%
Port Imperial South 1/3 Garage [Member] | Tax Year 3 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			95.00%
Port Imperial South 1/3 Garage [Member] | Tax Year 4 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			95.00%
Port Imperial South 1/3 Garage [Member] | Tax Year 5 [Member]
Commitments And Contingencies [Line Items]
Annual percentage of cost for phase in			95.00%
Port Imperial Hotel Development [Member]
Commitments And Contingencies [Line Items]
Project period			15 years
Percentage of PILOT on project costs			2.00%
Port Imperial South 11 Development [Member]
Commitments And Contingencies [Line Items]
Project period			15 years
Percentage of PILOT on gross revenues			10.00%
111 River Realty [Member]
Commitments And Contingencies [Line Items]
Payments in lieu of property taxes (PILOT)	$ 306,927
111 River Realty [Member] | Scenario, Forecast [Member]
Commitments And Contingencies [Line Items]
Annual Payments in lieu of property taxes (PILOT)					$ 1,227,708	$ 1,406,064

Commitments And Contingencies76

Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Commitments And Contingencies [Abstract]
Ground lease expense incurred	$ 538,000	$ 102,000	$ 767,000	$ 305,000

Commitments And Contingencies77

Commitments And Contingencies (Construction Projects) (Narrative) (Details)	Oct. 06, 2015USD ($)item	Apr. 01, 2015USD ($)	Sep. 30, 2016USD ($)item	Sep. 30, 2015USD ($)item	Sep. 30, 2016USD ($)item	Dec. 31, 2015USD ($)
Commitments And Contingencies [Line Items]
Amount outstanding			$ 95,000,000		$ 95,000,000	$ 155,000,000
Investment in unconsolidated joint ventures			31,318,000	$ 68,468,000
Development of rental property			150,592,000	49,959,000
Purchase price of property			$ 94,017,000	$ 59,700,000
Eastchester Project [Member]
Commitments And Contingencies [Line Items]
Percentage of interest in venture			76.25%		76.25%
Costs of the project incurred			$ 20,100,000
Delivery date to tenant			fourth quarter of 2016
Number of units | item			108		108
Project costs incurred to date			$ 49,400,000		$ 49,400,000
Amount of project costs funded by members			24,000,000		24,000,000
Total project costs			53,100,000
Amount to fund			3,900,000		3,900,000
City Square Project [Member]
Commitments And Contingencies [Line Items]
Costs of the project incurred					23,900,000
Total project costs			90,500,000
Purchase price of property		$ 3,100,000
Contingent consideration		$ 1,250,000
Amount to fund			$ 8,600,000		$ 8,600,000
City Square Project Phase One [Member]
Commitments And Contingencies [Line Items]
Delivery date to tenant			fourth quarter 2017
Number of units | item				237
Signature Place Project [Member]
Commitments And Contingencies [Line Items]
Costs of the project incurred			$ 12,900,000
Delivery date to tenant			fourth quarter of 2017
Number of units | item			197		197
Project costs incurred to date			$ 13,100,000		$ 13,100,000
Total project costs			58,700,000
Amount to fund			13,100,000		$ 13,100,000
Portside 5/6 Project [Member]
Commitments And Contingencies [Line Items]
Costs of the project incurred			$ 26,000,000
Delivery date to tenant			first quarter of 2018
Number of units | item			296		296
Project costs incurred to date			$ 27,700,000		$ 27,700,000
Total project costs			$ 111,400,000
City Square Project Phase Two [Member]
Commitments And Contingencies [Line Items]
Number of properties | item			128		128
Delivery date to tenant			third quarter 2018
Maximum borrowing capacity			$ 58,000,000		$ 58,000,000
Riverhouse 11 Project [Member]
Commitments And Contingencies [Line Items]
Costs of the project incurred			25,800,000
Total project costs			46,000,000
51 Washington Street Project [Member]
Commitments And Contingencies [Line Items]
Costs of the project incurred			$ 32,100,000
Delivery date to tenant			fourth quarter of 2018
Construction Loan [Member] | Eastchester Project [Member]
Commitments And Contingencies [Line Items]
Maximum borrowing capacity			$ 28,800,000		28,800,000
Amount outstanding			25,200,000		25,200,000
Construction Loan [Member] | City Square Project [Member]
Commitments And Contingencies [Line Items]
Maximum borrowing capacity			41,500,000		41,500,000
Amount outstanding			0		0
Construction Loan [Member] | Signature Place Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			42,000,000		42,000,000
Construction Loan [Member] | Riverhouse 11 Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			78,000,000		78,000,000
Construction Loan [Member] | 51 Washington Street Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			54,000,000		54,000,000
Development Property [Member] | Signature Place Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			16,700,000		16,700,000
Development Property [Member] | Portside 5/6 Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			27,700,000		$ 27,700,000
Development Property [Member] | Chase II Project [Member]
Commitments And Contingencies [Line Items]
Costs of the project incurred			$ 26,900,000
Delivery date to tenant			fourth quarter of 2016
Number of units | item			1,034		1,034
Total project costs			$ 74,900,000
Amount to fund			$ 0		$ 0
Development Property [Member] | Chase II Project, Initial Phase [Member]
Commitments And Contingencies [Line Items]
Number of units | item				292
Development Property [Member] | Riverhouse 11 Project [Member]
Commitments And Contingencies [Line Items]
Delivery date to tenant			first quarter 2018
Number of units | item			295		295
Project costs incurred to date			$ 33,000,000		$ 33,000,000
Total project costs			$ 124,000,000
Development Property [Member] | 51 Washington Street Project [Member]
Commitments And Contingencies [Line Items]
Number of properties | item			310		310
Costs of the project incurred			$ 19,500,000
Total project costs			86,100,000
Development Property [Member] | Construction Loan [Member] | Chase II Project [Member]
Commitments And Contingencies [Line Items]
Maximum borrowing capacity			48,000,000		$ 48,000,000
Amount outstanding			23,600,000		$ 23,600,000
Unconsolidated Joint Venture Hotel [Member]
Commitments And Contingencies [Line Items]
Percentage of interest in venture	90.00%
Development costs			$ 8,400,000
Number of units | item			350		350
Amount to fund			$ 0		$ 0
Unconsolidated Joint Venture Hotel [Member] | Portside 5/6 Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			38,400,000		38,400,000
Unconsolidated Joint Venture Hotel [Member] | XS Port Imperial Hotel, LLC [Member]
Commitments And Contingencies [Line Items]
Number of units | item	372
Ownership percentage of third party venture	10.00%
Unconsolidated Joint Venture Hotel [Member] | Port Imperial Hotel [Member]
Commitments And Contingencies [Line Items]
Total project costs	$ 105,900,000
Unconsolidated Joint Venture Hotel [Member] | Construction Loan [Member] | Portside 5/6 Project [Member]
Commitments And Contingencies [Line Items]
Amount to fund			73,000,000		73,000,000
Unconsolidated Joint Venture Hotel [Member] | Construction Loan [Member] | Port Imperial Hotel [Member]
Commitments And Contingencies [Line Items]
Amount outstanding			$ 8,300,000		$ 8,300,000
Amount to fund	$ 94,000,000

Commitments And Contingencies78

Commitments And Contingencies (Other) (Narrative) (Details) $ in Billions	9 Months Ended
	Sep. 30, 2016USD ($)property
Property Lock-Ups [Member]
Commitments And Contingencies [Line Items]
Expiration year	2,016
Property Lock-Ups Expired [Member]
Commitments And Contingencies [Line Items]
Number of properties | property	116
Properties aggregate net book value | $	$ 1.3

Commitments And Contingencies79

Commitments And Contingencies (Future Minimum Rental Payments Of Ground Leases) (Details) $ in Thousands	Sep. 30, 2016USD ($)
Commitments And Contingencies [Abstract]
October 1 through December 31, 2016	$ 320
2,017	2,024
2,018	1,989
2,019	1,999
2,020	2,015
2021 through 2084	172,264
Total	$ 180,611

Tenant Leases (Details)

Tenant Leases (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Property Subject to or Available for Operating Lease [Line Items]
October 1 through December 31, 2016	$ 119,973
2,017	438,466
2,018	379,744
2,019	319,822
2,020	273,424
2021 and thereafter	1,194,462
Total	$ 2,725,891
Tenant Leases [Member]
Property Subject to or Available for Operating Lease [Line Items]
Operating leases with various expiration dates through year	Dec. 31, 2035
Multi-Family Properties [Member]
Property Subject to or Available for Operating Lease [Line Items]
Lease period	1 year

Mack-Cali Realty Corporation 81

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Share/Unit Repurchase Program And Dividend Reinvestment And Stock Purchase Plan) (Narrative) (Details) - USD ($)	9 Months Ended	12 Months Ended	43 Months Ended
	Sep. 30, 2016	Dec. 31, 2012	Mar. 31, 2016
Stockolders Equity [Line Items]
Date share repurchase program was initiated	September 2,012
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
Proceeds from sale of common units		$ 11,000,000
Dividend Reinvestment And Stock Purchase Plan [Member]
Stockolders Equity [Line Items]
Common stock reserved for future issuance	5,500,000
Monthly cash investment without restriction, maximum	$ 5,000

Mack-Cali Realty Corporation 82

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Stock Options Plans) (Narrative) (Details)	Jun. 05, 2015item$ / sharesshares	Sep. 30, 2016USD ($)shares	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)shares	Sep. 30, 2015USD ($)shares	Dec. 31, 2015	May 31, 2013shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option terms				10 years
Weighted average remaining contractual life				8 years 7 months 6 days		9 years 4 months 24 days
Share price | $ / shares	$ 17.31
Options exercised				0	0
Stock options expense | $		$ 924,000	$ 185,000	$ 1,291,000	$ 248,000
Shares Under Options - Granted	800,000
Common stock trade share price | $ / shares	$ 25
Annual installments | item	3
Exercisable period				10 years
Common stock trading days				30 days
Three Equal Annual Installment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Under Options - Granted	400,000
Common Stock Trades [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Under Options - Granted	400,000
2013 Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance							4,600,000
Employee And Director Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance		2,700,000		2,700,000
Employee And Director Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance		4,350,000		4,350,000
2000 Employee Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable time period				5 years
2000 Employee Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance		2,500,000		2,500,000
2000 Employee Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance		4,000,000		4,000,000
2000 Director Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable time period				1 year
2000 Director Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance		200,000		200,000
2000 Director Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved stocks for issuance		350,000		350,000

Mack-Cali Realty Corporation 83

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Restricted Stock Awards And Performance Share Units/TSR-Based Awards) (Narrative) (Details) - USD ($) $ in Millions	Jun. 05, 2015	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock outstanding		107,749	136,220
Shares granted		36,870
Shares issued		4,299,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock outstanding		82,716
Restricted Stock [Member] | 2013 Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	37,550.54
Performance period		3 years
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation vesting period		1 year
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation vesting period		7 years
Unvested Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock outstanding		82,716		99,006
Total Stockholder Return Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		$ 0.5
Total unrecognized compensation cost, period of recognition		6 months
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		$ 0.8
Total unrecognized compensation cost, period of recognition		1 year 8 months 12 days
Performance Shares [Member] | 2013 Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	112,651.64
Performance period		3 years
Performance Shares [Member] | Minimum [Member] | 2013 Incentive Stock Plan [Member] | Three Years Period Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vested	0.00%
Performance Shares [Member] | Maximum [Member] | 2013 Incentive Stock Plan [Member] | Three Years Period Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares vested	150.00%

Mack-Cali Realty Corporation 84

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Long-Term Incentive Plan Awards) (Narrative) (Details) $ in Millions	Mar. 08, 2016	Jun. 05, 2015shares	Sep. 30, 2016USD ($)itemshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		800,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost | $			$ 0.8
Total unrecognized compensation cost, period of recognition			1 year 8 months 12 days
2016 LTIP Plan Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period			3 years
Dividends paid, percent representing common unit of limited partnership interest			10.00%
Dividends paid, percent payable upon vesting of LTIP Unit			90.00%
Total unrecognized compensation cost | $			$ 7.4
Total unrecognized compensation cost, period of recognition			2 years 10 months 24 days
2016 TBV LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			157,617
2016 OPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
TSR percent			50.00%
2016 PBV LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			499,756
Messieur Rudin, Messieur DeMarco, And Messieur Tycher [Member] | 2016 LTIP Plan Awards [Member] | Time-Based Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of the award	25.00%
Performance period			3 years
Messieur Rudin, Messieur DeMarco, And Messieur Tycher [Member] | 2016 LTIP Plan Awards [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining percent of the award	75.00%
Other Executive Officers [Member] | 2016 LTIP Plan Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percent of the award	40.00%
Remaining percent of the award	60.00%
Executive Officers [Member] | 2016 LTIP Plan Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of senior management who received 2016 LTIP awards | item			8

Mack-Cali Realty Corporation 85

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Deferred Stock Compensation Plan For Directors) (Narrative) (Details) - shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital [Abstract]
Maximum percentage of retainer fee that directors may defer	100.00%
Deferred stock units earned	11,249	15,279
Deferred stock units outstanding	190,322		178,039

Mack-Cali Realty Corporation 86

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share) (Narrative) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Anti-dilutive securities excluded from the computation of earnings per share			0	405,000
Dividends declared per common share	$ 0.15	$ 0.15	$ 0.45	$ 0.45
Unvested restricted stock outstanding	107,749		107,749		136,220
Unvested Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock outstanding	82,716	99,006	82,716	99,006

Mack-Cali Realty Corporation 87

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Stock Option Plans) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital [Abstract]
Shares Under Options - Outstanding, beginning balance | shares	805,000
Shares Under Options - Lapsed or Cancelled | shares
Shares Under Options - Outstanding, ending balance | shares	805,000
Shares Under Options - Options exercisable | shares	538,334
Shares Under Options - Available for grant | shares	2,728,507
Weighted Average Exercise Price - Outstanding, beginning balance | $ / shares	$ 17.33
Weighted Average Exercise Price - Lapsed or Cancelled | $ / shares
Weighted Average Exercise Price - Outstanding, ending balance | $ / shares	$ 17.33
Aggregate Intrinsic Value, Outstanding, beginning balance | $	$ 4,843
Aggregate Intrinsic Value, Outstanding, ending balance | $	$ 7,958
Outstanding stock option price range, lower range | $ / shares	$ 17.31
Outstanding stock option price range, upper range | $ / shares	$ 21.25

Mack-Cali Realty Corporation 88

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details)	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital [Abstract]
Shares, Outstanding, Beginning balance | shares	136,220
Shares, Granted | shares	36,870
Shares, Vested | shares	(61,654)
Shares, Forfeited | shares	(3,687)
Shares, Outstanding, Ending balance | shares	107,749
Weighted-Average Grant-Date Fair Value, Outstanding beginning balance | $ / shares	$ 19.36
Weighted-Average Grant-Date Fair Value, Granted | $ / shares	21.70
Weighted-Average Grant-Date Fair Value, Vested | $ / shares	18.94
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares	21.70
Weighted-Average Grant-Date Fair Value, Outstanding ending balance | $ / shares	$ 20.33

Mack-Cali Realty Corporation 89

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Basic Computation Of EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (loss)	$ (9,605)	$ (142,141)	$ 113,530	$ (106,077)
Add: Noncontrolling interest in consolidated joint ventures	65	(281)	460	582
Add (deduct): Noncontrolling interest in Operating Partnership	999	15,530	(11,947)	11,461
Net income (loss) available to common shareholders	$ (8,541)	$ (126,892)	$ 102,043	$ (94,034)
Weighted average common shares	89,755	89,249	89,739	89,229
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.14	$ (1.05)
Mack Cali Realty LP [Member]
Net income (loss)	$ (9,605)	$ (142,141)	$ 113,530	$ (106,077)
Add: Noncontrolling interest in consolidated joint ventures	65	(281)	460	582
Net income (loss) available to common shareholders	$ (9,540)	$ (142,422)	$ 113,990	$ (105,495)
Weighted average common units	100,253	100,172	100,241	100,236
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.14	$ (1.05)

Mack-Cali Realty Corporation 90

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (loss) available to common shareholders	$ (8,541)	$ (126,892)	$ 102,043	$ (94,034)
Add (deduct): Noncontrolling interest in Operating Partnership	(999)	(15,530)	11,947	(11,461)
Net income (loss) for diluted earnings per share	$ (9,540)	$ (142,422)	$ 113,990	$ (105,495)
Weighted average common shares	100,253	100,172	100,486	100,236
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.13	$ (1.05)
Mack Cali Realty LP [Member]
Net income (loss) available to common shareholders	$ (9,540)	$ (142,422)	$ 113,990	$ (105,495)
Weighted average common unit	100,253	100,172	100,486	100,236
Net income (loss) available to common shareholders	$ (0.10)	$ (1.42)	$ 1.13	$ (1.05)

Mack-Cali Realty Corporation 91

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Basic EPS shares	89,755	89,249	89,739	89,229
Add: Operating Partnership - common units	10,498	10,923	10,502	11,007
Restricted Stock Awards			50
Stock Options			195
Diluted EPS Shares	100,253	100,172	100,486	100,236
Mack Cali Realty LP [Member]
Basic weighted average units outstanding	100,253	100,172	100,241	100,236
Restricted Stock Awards			50
Stock Options			195
Diluted weighted average units outstanding	100,253	100,172	100,486	100,236

Noncontrolling Interests In S92

Noncontrolling Interests In Subsidiaries (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)propertyshares	Dec. 31, 2015
Noncontrolling Interest [Line Items]
Number of common shares received upon redemption of common units | shares	1
Rebalance of ownership percentage | $	$ (0.9)
Percentage of noncontrolling interest	10.50%	10.50%
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 S93

Noncontrolling Interests In Subsidiaries (Schedule Of Activity Of Noncontrolling Interests) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Noncontrolling Interest [Line Items]
Balance, value	$ 228,032
Unit distributions	(4,947)
Acquisition/increase in noncontrolling interest in consolidated joint ventures	(35,130)
Redemption of common units for common stock
Other comprehensive income (loss)	(7,528)
Rebalancing of ownership percentage between parent and subsidiaries
Balance, value	198,577
Noncontrolling Interests In Subsidiaries [Member]
Noncontrolling Interest [Line Items]
Balance, value	228,032	$ 257,230
Net income	11,487	(12,043)
Unit distributions	(4,947)	(4,927)
Acquisition/increase in noncontrolling interest in consolidated joint ventures	(35,544)	251
Redemption of common units for common stock	(308)	(5,370)
Stock compensation	1,511
Other comprehensive income (loss)	(789)
Rebalancing of ownership percentage between parent and subsidiaries	(865)	276
Balance, value	$ 198,577	$ 235,417

Noncontrolling Interests In S94

Noncontrolling Interests In Subsidiaries (Changes In Noncontrolling Interests Of Subsidiaries) (Details)	9 Months Ended
	Sep. 30, 2016shares
Noncontrolling Interests In Subsidiaries [Abstract]
Balance, Beginning, Common Units	10,516,844
Redemption of common units for shares of common stock	(18,898)
Balance, Ending, Common Units	10,497,946
Balance, Beginning, LTIP Units
Granted, LTIP Units	657,373
Balance, Ending, LTIP Units	657,373

Segment Reporting (Narrative) (

Segment Reporting (Narrative) (Details)	9 Months Ended
	Sep. 30, 2016USD ($)segment	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Segment Reporting Information [Line Items]
Number of business segments | segment	3
Foreign Locations [Member]
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0
Long lived assets	$ 0		$ 0

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Selected Results Of Operations And Asset Information) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015		Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues		$ 157,517		$ 146,158		$ 459,667		$ 448,440
Total operating and interest expenses	[1]	104,440		101,877		313,919		320,061
Equity in earnings (loss) of unconsolidated joint ventures		21,790		3,135		19,622		(2,723)
Net operating income (loss)	[2]	74,867		47,416		165,370		125,656
Total assets		4,435,619				4,435,619				$ 4,053,963
Total long-lived assets	[3]	3,728,816				3,728,816				3,466,427
Total investments in unconsolidated joint ventures		319,807				319,807				303,457
Impairment charge				164,176				164,176
Corporate & Other [Member]
Segment Reporting Information [Line Items]
Total revenues	[4]	(2,357)		(1,125)		(7,281)		(3,139)
Total operating and interest expenses	[1],[4]	21,269		28,236		65,789		79,804
Net operating income (loss)	[2],[4]	(23,626)		(29,361)		(73,070)		(82,943)
Total assets	[4]	62,147				62,147				41,535
Total long-lived assets	[3],[4]	(4,455)				(4,455)				(1,531)
Real Estate - Commercial And Other [Member]
Segment Reporting Information [Line Items]
Total revenues		141,226		131,910		411,947		406,128
Total operating and interest expenses	[1]	68,533		59,810		201,914		199,178
Equity in earnings (loss) of unconsolidated joint ventures		22,487		5,181		23,569		4,611
Net operating income (loss)	[2]	95,180		77,281		233,602		211,561
Total assets		3,394,462				3,394,462				3,166,577
Total long-lived assets	[3]	3,061,298				3,061,298				2,886,583
Total investments in unconsolidated joint ventures		80,735				80,735				76,140
Real Estate - Multi Family [Member]
Segment Reporting Information [Line Items]
Total revenues		8,806		6,964		27,011		20,541
Total operating and interest expenses	[1]	5,005		4,233		16,337		12,775
Equity in earnings (loss) of unconsolidated joint ventures		(1,442)		(2,793)		(4,773)		(8,290)
Net operating income (loss)	[2]	2,359		(62)		5,901		(524)
Total assets		963,569				963,569				836,020
Total long-lived assets	[3]	667,602				667,602				577,705
Total investments in unconsolidated joint ventures		238,261				238,261				225,850
Multi Family Services [Member]
Segment Reporting Information [Line Items]
Total revenues		9,842	[5]	8,409	[6]	27,990	[5]	24,910	[6]
Total operating and interest expenses	[1]	9,633	[7]	9,598	[8]	29,879	[7]	28,304	[8]
Equity in earnings (loss) of unconsolidated joint ventures		745		747		826		956
Net operating income (loss)	[2]	954		(442)		(1,063)		(2,438)
Total assets		15,441				15,441				9,831
Total long-lived assets	[3]	4,371				4,371				3,670
Total investments in unconsolidated joint ventures		811				811				$ 1,467
Fee revenue		3,800		1,500		10,100		5,900
Management fee and salary reimbursement expenses		$ 1,800		$ 1,000		$ 4,900		$ 4,500
[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, acquisition related costs and interest expense (net of interest income). All interest expense, net of interest and other investment 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 "a"), 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]	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.
[5]	Includes $3.8 million and $10.1 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation.
[6]	Includes $2.2 million and $5.9 million of fees and salary reimbursements earned for the three and nine months ended September 30, 2015, respectively, from the multi-family real estate segment, which are eliminated in consolidation.
[7]	Includes $1.8 million and $4.9 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation.
[8]	Includes $1 million and $4.5 million of management fees and salary reimbursement expenses for the three and nine months ended September 30, 2016, respectively, from the multi-family real estate segment, which are eliminated in consolidation.

Segment Reporting (Schedule O97

Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Net operating income	[1]	$ 74,867	$ 47,416	$ 165,370	$ 125,656
Depreciation and amortization		(48,117)	(44,099)	(134,639)	(127,266)
Gain on change of control of interests				15,347
Realized gains (losses) and unrealized losses on disposition of rental property, net		(17,053)	18,718	68,664	53,261
Gain on sale of investment in unconsolidated joint venture				5,670	6,448
Loss from extinguishment of debt, net		(19,302)		(6,882)
Impairments			(164,176)		(164,176)
Net income (loss)		(9,605)	(142,141)	113,530	(106,077)
Noncontrolling interest in consolidated joint ventures		65	(281)	460	582
Noncontrolling interest in Operating Partnership		999	15,530	(11,947)	11,461
Net income (loss) available to common shareholders		(8,541)	(126,892)	102,043	(94,034)
Mack Cali Realty LP [Member]
Segment Reporting Information [Line Items]
Net operating income		74,867	47,416	165,370	125,656
Depreciation and amortization		(48,117)	(44,099)	(134,639)	(127,266)
Gain on change of control of interests				15,347
Realized gains (losses) and unrealized losses on disposition of rental property, net		(17,053)	18,718	68,664	53,261
Gain on sale of investment in unconsolidated joint venture				5,670	6,448
Loss from extinguishment of debt, net		(19,302)		(6,882)
Impairments			(164,176)		(164,176)
Net income (loss)		(9,605)	(142,141)	113,530	(106,077)
Noncontrolling interest in consolidated joint ventures		65	(281)	460	582
Net income (loss) available to common shareholders		$ (9,540)	$ (142,422)	$ 113,990	$ (105,495)
[1]	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.