Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 324,782	$ 210,577
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	353,761	407,539
Net gains on disposition of wholly owned and partially owned assets	(164,828)	(501)
Distributions of income from partially owned entities	61,782	65,097
Net realized and unrealized losses on real estate fund investments	33,709	18,537
Amortization of below-market leases, net	(31,480)	(35,446)
Other non-cash adjustments	28,432	43,921
Decrease in fair value of marketable securities	24,801	0
Return of capital from real estate fund investments	20,291	80,294
Straight-lining of rents	(10,279)	(37,752)
Equity in net income of partially owned entities	(6,059)	(6,013)
Net gains on sale of real estate and other	0	(3,797)
Changes in operating assets and liabilities:
Real estate fund investments	(68,950)	0
Tenant and other receivables, net	(11,662)	5,485
Prepaid assets	74,322	(70,949)
Other assets	(122,925)	(27,065)
Accounts payable and accrued expenses	(3,810)	27,609
Other liabilities	(13,849)	(15,911)
Net cash provided by operating activities	488,038	661,625
Cash Flows from Investing Activities:
Acquisitions of real estate and other	(500,225)	(11,841)
Development costs and construction in progress	(274,147)	(274,716)
Proceeds from sales of real estate and related investments	219,731	9,543
Additions to real estate	(163,546)	(207,759)
Distributions of capital from partially owned entities	98,609	347,776
Investments in partially owned entities	(32,728)	(33,578)
Repayment of JBG SMITH Properties loan receivable	0	115,630
Proceeds from repayments of mortgage loans receivable	0	650
Net cash used in investing activities	(652,306)	(54,295)
Cash Flows from Financing Activities:
Redemption of preferred shares / units	(470,000)	0
Dividends paid on common shares / Distributions to Vornado	(359,456)	(382,552)
Proceeds from borrowings	312,763	229,042
Repayments of borrowings	(264,482)	(177,109)
Distributions to noncontrolling interests / Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries	(63,110)	(48,329)
Contributions from noncontrolling interests / noncontrolling interests in consolidated subsidiaries	59,924	1,044
Dividends paid on preferred shares / Distributions to preferred unitholders	(42,582)	(48,386)
Debt prepayment and extinguishment costs	(7,451)	(2,944)
Proceeds received from exercise of employee share options and other / Proceeds received from exercise of Vornado stock options and other	5,262	25,011
Repurchase of shares related to stock compensation agreements and related tax withholdings and other	(818)	0
Repurchase of shares / Class A units related to stock compensation agreements and related tax withholdings and other	(784)	(418)
Cash and cash equivalents and restricted cash included in the spin-off of JBG SMITH Properties ($275,000 plus The Bartlett financing proceeds less transaction costs and other mortgage items)	0	(416,237)
Net cash used in financing activities	(830,734)	(820,878)
Net decrease in cash and cash equivalents and restricted cash	(995,002)	(213,548)
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,331
Cash and cash equivalents and restricted cash at end of period	919,810	1,385,783
Reconciliation of Cash and Cash Equivalents and Restricted Cash:
Cash and cash equivalents at beginning of period	1,817,655	1,501,027
Restricted cash at beginning of period	97,157	95,032
Restricted cash included in discontinued operations at beginning of period	0	3,272
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,331
Cash and cash equivalents at end of period	772,524	1,282,230
Restricted cash at end of period	147,286	103,553
Restricted cash included in discontinued operations at end of period	0	0
Cash and cash equivalents and restricted cash at end of period	919,810	1,385,783
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $45,292 and $31,243	245,628	257,173
Cash payments for income taxes	61,047	5,292
Non-Cash Investing and Financing Activities:
Reclassification of condominium units from development costs and construction in progress to 220 Central Park South condominium units ready for sale	307,552	0
Adjustments to carry redeemable Class A units at redemption value	74,185	69,033
Accrued capital expenditures included in accounts payable and accrued expenses	(61,120)	(41,458)
Adjustments to carry redeemable Class A units at redemption value	57,970	286,928
Non-cash distribution to JBG SMITH Properties:
Assets	0	3,432,738
Liabilities	0	(1,414,186)
Equity	0	(2,018,552)
Loan receivable established upon the spin-off of JBG SMITH Properties	0	115,630
Reduction in unrealized net gain on available-for-sale securities	0	(10,559)
Vornado Realty L.P.
Cash Flows from Operating Activities:
Net income	324,782	210,577
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	353,761	407,539
Net gains on disposition of wholly owned and partially owned assets	(164,828)	(501)
Distributions of income from partially owned entities	61,782	65,097
Net realized and unrealized losses on real estate fund investments	33,709	18,537
Amortization of below-market leases, net	(31,480)	(35,446)
Other non-cash adjustments	28,432	43,921
Decrease in fair value of marketable securities	24,801	0
Return of capital from real estate fund investments	20,291	80,294
Straight-lining of rents	(10,279)	(37,752)
Equity in net income of partially owned entities	(6,059)	(6,013)
Net gains on sale of real estate and other	0	(3,797)
Changes in operating assets and liabilities:
Real estate fund investments	(68,950)	0
Tenant and other receivables, net	(11,662)	5,485
Prepaid assets	74,322	(70,949)
Other assets	(122,925)	(27,065)
Accounts payable and accrued expenses	(3,810)	27,609
Other liabilities	(13,849)	(15,911)
Net cash provided by operating activities	488,038	661,625
Cash Flows from Investing Activities:
Acquisitions of real estate and other	(500,225)	(11,841)
Development costs and construction in progress	(274,147)	(274,716)
Proceeds from sales of real estate and related investments	219,731	9,543
Additions to real estate	(163,546)	(207,759)
Distributions of capital from partially owned entities	98,609	347,776
Investments in partially owned entities	(32,728)	(33,578)
Repayment of JBG SMITH Properties loan receivable	0	115,630
Proceeds from repayments of mortgage loans receivable	0	650
Net cash used in investing activities	(652,306)	(54,295)
Cash Flows from Financing Activities:
Redemption of preferred shares / units	(470,000)	0
Dividends paid on common shares / Distributions to Vornado	(359,456)	(382,552)
Proceeds from borrowings	312,763	229,042
Repayments of borrowings	(264,482)	(177,109)
Distributions to noncontrolling interests / Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries	(63,110)	(48,329)
Contributions from noncontrolling interests / noncontrolling interests in consolidated subsidiaries	59,924	1,044
Dividends paid on preferred shares / Distributions to preferred unitholders	(42,582)	(48,386)
Debt prepayment and extinguishment costs	(7,451)	(2,944)
Proceeds received from exercise of employee share options and other / Proceeds received from exercise of Vornado stock options and other	5,262	25,011
Repurchase of shares related to stock compensation agreements and related tax withholdings and other	(818)	0
Repurchase of shares / Class A units related to stock compensation agreements and related tax withholdings and other	(784)	(418)
Cash and cash equivalents and restricted cash included in the spin-off of JBG SMITH Properties ($275,000 plus The Bartlett financing proceeds less transaction costs and other mortgage items)	0	(416,237)
Net cash used in financing activities	(830,734)	(820,878)
Net decrease in cash and cash equivalents and restricted cash	(995,002)	(213,548)
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,331
Cash and cash equivalents and restricted cash at end of period	919,810	1,385,783
Reconciliation of Cash and Cash Equivalents and Restricted Cash:
Cash and cash equivalents at beginning of period	1,817,655	1,501,027
Restricted cash at beginning of period	97,157	95,032
Restricted cash included in discontinued operations at beginning of period	0	3,272
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,331
Cash and cash equivalents at end of period	772,524	1,282,230
Restricted cash at end of period	147,286	103,553
Restricted cash included in discontinued operations at end of period	0	0
Cash and cash equivalents and restricted cash at end of period	919,810	1,385,783
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $45,292 and $31,243	245,628	257,173
Cash payments for income taxes	61,047	5,292
Non-Cash Investing and Financing Activities:
Reclassification of condominium units from development costs and construction in progress to 220 Central Park South condominium units ready for sale	307,552	0
Adjustments to carry redeemable Class A units at redemption value	74,185	69,033
Accrued capital expenditures included in accounts payable and accrued expenses	(61,120)	(41,458)
Adjustments to carry redeemable Class A units at redemption value	57,970	286,928
Non-cash distribution to JBG SMITH Properties:
Assets	0	3,432,738
Liabilities	0	(1,414,186)
Equity	0	(2,018,552)
Loan receivable established upon the spin-off of JBG SMITH Properties	0	115,630
Reduction in unrealized net gain on available-for-sale securities	$ 0	$ (10,559)