Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 105,620	$ 221,331
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	233,748	289,898
Distributions of income from partially owned entities	45,999	44,778
Net realized and unrealized losses on real estate fund investments	30,426	6,201
Other non-cash adjustments	24,320	30,070
Net gains on disposition of wholly owned and partially owned assets	(23,559)	(501)
Amortization of below-market leases, net	(21,107)	(24,391)
Return of capital from real estate fund investments	20,291	0
Decrease in fair value of marketable securities	17,102	0
Straight-lining of rents	(10,122)	(28,581)
Equity in net loss (income) of partially owned entities	1,147	(47,721)
Net gains on sale of real estate and other	0	(2,267)
Changes in operating assets and liabilities:
Real estate fund investments	(68,950)	0
Tenant and other receivables, net	(7,511)	3,974
Prepaid assets	(19,092)	(146,770)
Other assets	(114,881)	(5,606)
Accounts payable and accrued expenses	(11,036)	(6,029)
Other liabilities	38,865	(18,169)
Net cash provided by operating activities	241,260	316,217
Cash Flows from Investing Activities:
Development costs and construction in progress	(185,039)	(191,073)
Additions to real estate	(113,300)	(139,611)
Distributions of capital from partially owned entities	81,997	113,507
Acquisitions of real estate and other	(56,500)	(11,841)
Proceeds from sales of real estate and related investments	44,599	5,180
Investments in partially owned entities	(26,663)	(27,720)
Proceeds from repayments of mortgage loans receivable	0	29
Net cash used in investing activities	(254,906)	(251,529)
Cash Flows from Financing Activities:
Redemption of preferred shares / units	(470,000)	0
Dividends paid on common shares / Distributions to Vornado	(239,594)	(268,817)
Proceeds from borrowings	189,042	226,929
Repayments of borrowings	(148,408)	(13,971)
Contributions from noncontrolling interests / noncontrolling interests in consolidated subsidiaries	59,558	991
Distributions to noncontrolling interests / Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries	(49,338)	(25,617)
Dividends paid on preferred shares / Distributions to preferred unitholders	(30,047)	(32,258)
Proceeds received from exercise of employee share options and other / Proceeds received from exercise of Vornado stock options and other	4,471	9,626
Debt issuance costs	(3,289)	(2,919)
Debt prepayment and extinguishment costs	(818)	0
Repurchase of shares / Class A units related to stock compensation agreements and related tax withholdings and other	(784)	(285)
Net cash used in financing activities	(689,207)	(106,321)
Net decrease in cash and cash equivalents and restricted cash	(702,853)	(41,633)
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,322
Cash and cash equivalents and restricted cash at end of period	1,211,959	1,557,689
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	3,263
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,322
Cash and cash equivalents at end of period	1,090,791	1,471,303
Restricted cash at end of period	121,168	82,651
Restricted cash included in discontinued operations at end of period	0	3,735
Cash and cash equivalents and restricted cash at end of period	1,211,959	1,557,689
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $28,558 and $20,050	155,875	175,718
Cash payments for income taxes	4,365	3,151
Non-Cash Investing and Financing Activities:
Accrued capital expenditures included in accounts payable and accrued expenses	54,176	59,733
Write-off of fully depreciated assets	(38,117)	(35,727)
Adjustments to carry redeemable Class A units at redemption value	36,450	90,208
Reduction in unrealized net gain on available-for-sale securities	0	(16,215)
Vornado Realty L.P.
Cash Flows from Operating Activities:
Net income	105,620	221,331
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	233,748	289,898
Distributions of income from partially owned entities	45,999	44,778
Net realized and unrealized losses on real estate fund investments	30,426	6,201
Other non-cash adjustments	24,320	30,070
Net gains on disposition of wholly owned and partially owned assets	(23,559)	(501)
Amortization of below-market leases, net	(21,107)	(24,391)
Return of capital from real estate fund investments	20,291	0
Decrease in fair value of marketable securities	17,102	0
Straight-lining of rents	(10,122)	(28,581)
Equity in net loss (income) of partially owned entities	1,147	(47,721)
Net gains on sale of real estate and other	0	(2,267)
Changes in operating assets and liabilities:
Real estate fund investments	(68,950)	0
Tenant and other receivables, net	(7,511)	3,974
Prepaid assets	(19,092)	(146,770)
Other assets	(114,881)	(5,606)
Accounts payable and accrued expenses	(11,036)	(6,029)
Other liabilities	38,865	(18,169)
Net cash provided by operating activities	241,260	316,217
Cash Flows from Investing Activities:
Development costs and construction in progress	(185,039)	(191,073)
Additions to real estate	(113,300)	(139,611)
Distributions of capital from partially owned entities	81,997	113,507
Acquisitions of real estate and other	(56,500)	(11,841)
Proceeds from sales of real estate and related investments	44,599	5,180
Investments in partially owned entities	(26,663)	(27,720)
Proceeds from repayments of mortgage loans receivable	0	29
Net cash used in investing activities	(254,906)	(251,529)
Cash Flows from Financing Activities:
Redemption of preferred shares / units	(470,000)	0
Dividends paid on common shares / Distributions to Vornado	(239,594)	(268,817)
Proceeds from borrowings	189,042	226,929
Repayments of borrowings	(148,408)	(13,971)
Contributions from noncontrolling interests / noncontrolling interests in consolidated subsidiaries	59,558	991
Distributions to noncontrolling interests / Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries	(49,338)	(25,617)
Dividends paid on preferred shares / Distributions to preferred unitholders	(30,047)	(32,258)
Proceeds received from exercise of employee share options and other / Proceeds received from exercise of Vornado stock options and other	4,471	9,626
Debt issuance costs	(3,289)	(2,919)
Debt prepayment and extinguishment costs	(818)	0
Repurchase of shares / Class A units related to stock compensation agreements and related tax withholdings and other	(784)	(285)
Net cash used in financing activities	(689,207)	(106,321)
Net decrease in cash and cash equivalents and restricted cash	(702,853)	(41,633)
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,322
Cash and cash equivalents and restricted cash at end of period	1,211,959	1,557,689
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	3,263
Cash and cash equivalents and restricted cash at beginning of period	1,914,812	1,599,322
Cash and cash equivalents at end of period	1,090,791	1,471,303
Restricted cash at end of period	121,168	82,651
Restricted cash included in discontinued operations at end of period	0	3,735
Cash and cash equivalents and restricted cash at end of period	1,211,959	1,557,689
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $28,558 and $20,050	155,875	175,718
Cash payments for income taxes	4,365	3,151
Non-Cash Investing and Financing Activities:
Accrued capital expenditures included in accounts payable and accrued expenses	54,176	59,733
Write-off of fully depreciated assets	(38,117)	(35,727)
Adjustments to carry redeemable Class A units at redemption value	36,450	90,208
Reduction in unrealized net gain on available-for-sale securities	$ 0	$ (16,215)