Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities:
Net income	$ 282	$ 73,847
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	115,337	145,886
Decrease in fair value of marketable securities	32,986	0
Distributions of income from partially owned entities	20,559	18,226
Return of capital from real estate fund investments	14,966	0
Amortization of below-market leases, net	(10,581)	(11,459)
Equity in net loss (income) of partially owned entities	9,904	(1,445)
Straight-lining of rents	(7,430)	(15,522)
Net realized and unrealized losses on real estate fund investments	911	6,946
Net gains on sale of real estate and other	0	(2,267)
Net gains on disposition of wholly owned and partially owned assets	0	(501)
Other non-cash adjustments	14,736	17,535
Changes in operating assets and liabilities:
Real estate fund investments	(2,950)	0
Tenant and other receivables, net	(5,702)	2,027
Prepaid assets	77,053	72,051
Other assets	(15,151)	(11,452)
Accounts payable and accrued expenses	19,835	(670)
Other liabilities	663	8,083
Net cash provided by operating activities	265,418	301,285
Cash Flows from Investing Activities:
Development costs and construction in progress	(86,808)	(98,227)
Additions to real estate	(54,284)	(67,363)
Acquisitions of real estate and other	(44,095)	(1,171)
Investments in partially owned entities	(7,519)	(6,679)
Distributions of capital from partially owned entities	2,086	11,592
Proceeds from sales of real estate and related investments	0	5,180
Proceeds from repayments of mortgage loans receivable	0	14
Net cash used in investing activities	(190,620)	(156,654)
Cash Flows from Financing Activities:
Redemption of preferred shares / units	(470,000)	0
Proceeds from borrowings	185,701	2,529
Repayments of borrowings	(144,822)	(6,987)
Dividends paid on common shares / Distributions to Vornado	(119,764)	(134,332)
Dividends paid on preferred shares / Distributions to preferred unitholders	(16,628)	(16,129)
Distributions to noncontrolling interests / Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries	(13,266)	(14,281)
Contributions from noncontrolling interests / noncontrolling interests in consolidated subsidiaries	8,370	75
Proceeds received from exercise of employee share options and other / Proceeds received from exercise of Vornado stock options and other	3,769	8,484
Debt issuance costs	(3,300)	(43)
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)	(264)
Net cash used in financing activities	(571,542)	(160,948)
Net decrease in cash and cash equivalents and restricted cash	(496,744)	(16,317)
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	1,418,068	1,583,005
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	1,327,384	1,484,814
Restricted cash at end of period	90,684	93,463
Restricted cash included in discontinued operations at end of period	0	4,728
Cash and cash equivalents and restricted cash at end of period	1,418,068	1,583,005
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $13,272 and $9,364	84,566	88,078
Cash payments for income taxes	1,646	1,512
Non-Cash Investing and Financing Activities:
Adjustments to carry redeemable Class A units at redemption value	114,856	6,197
Accrued capital expenditures included in accounts payable and accrued expenses	51,431	57,993
Write-off of fully depreciated assets	(15,707)	(15,809)
Reduction in unrealized net gain on available-for-sale securities	0	(15,009)
Vornado Realty L.P.
Cash Flows from Operating Activities:
Net income	282	73,847
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization (including amortization of deferred financing costs)	115,337	145,886
Decrease in fair value of marketable securities	32,986	0
Distributions of income from partially owned entities	20,559	18,226
Return of capital from real estate fund investments	14,966	0
Amortization of below-market leases, net	(10,581)	(11,459)
Equity in net loss (income) of partially owned entities	9,904	(1,445)
Straight-lining of rents	(7,430)	(15,522)
Net realized and unrealized losses on real estate fund investments	911	6,946
Net gains on sale of real estate and other	0	(2,267)
Net gains on disposition of wholly owned and partially owned assets	0	(501)
Other non-cash adjustments	14,736	17,535
Changes in operating assets and liabilities:
Real estate fund investments	(2,950)	0
Tenant and other receivables, net	(5,702)	2,027
Prepaid assets	77,053	72,051
Other assets	(15,151)	(11,452)
Accounts payable and accrued expenses	19,835	(670)
Other liabilities	663	8,083
Net cash provided by operating activities	265,418	301,285
Cash Flows from Investing Activities:
Development costs and construction in progress	(86,808)	(98,227)
Additions to real estate	(54,284)	(67,363)
Acquisitions of real estate and other	(44,095)	(1,171)
Investments in partially owned entities	(7,519)	(6,679)
Distributions of capital from partially owned entities	2,086	11,592
Proceeds from sales of real estate and related investments	0	5,180
Proceeds from repayments of mortgage loans receivable	0	14
Net cash used in investing activities	(190,620)	(156,654)
Cash Flows from Financing Activities:
Redemption of preferred shares / units	(470,000)	0
Proceeds from borrowings	185,701	2,529
Repayments of borrowings	(144,822)	(6,987)
Dividends paid on common shares / Distributions to Vornado	(119,764)	(134,332)
Dividends paid on preferred shares / Distributions to preferred unitholders	(16,628)	(16,129)
Distributions to noncontrolling interests / Distributions to redeemable security holders and noncontrolling interests in consolidated subsidiaries	(13,266)	(14,281)
Contributions from noncontrolling interests / noncontrolling interests in consolidated subsidiaries	8,370	75
Proceeds received from exercise of employee share options and other / Proceeds received from exercise of Vornado stock options and other	3,769	8,484
Debt issuance costs	(3,300)	(43)
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)	(264)
Net cash used in financing activities	(571,542)	(160,948)
Net decrease in cash and cash equivalents and restricted cash	(496,744)	(16,317)
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	1,418,068	1,583,005
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	1,327,384	1,484,814
Restricted cash at end of period	90,684	93,463
Restricted cash included in discontinued operations at end of period	0	4,728
Cash and cash equivalents and restricted cash at end of period	1,418,068	1,583,005
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest, excluding capitalized interest of $13,272 and $9,364	84,566	88,078
Cash payments for income taxes	1,646	1,512
Non-Cash Investing and Financing Activities:
Adjustments to carry redeemable Class A units at redemption value	114,856	6,197
Accrued capital expenditures included in accounts payable and accrued expenses	51,431	57,993
Write-off of fully depreciated assets	(15,707)	(15,809)
Reduction in unrealized net gain on available-for-sale securities	$ 0	$ (15,009)