Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 62,626	$ 64,822
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	27,049	27,666
Straight-lining of rental income	3,223	1,594
Stock-based compensation expense	394	450
Changes in operating assets and liabilities:
Tenant and other receivables, net	(947)	1,081
Other assets	(14,209)	(23,088)
Amounts due to Vornado	(334)	(1,951)
Accounts payable and accrued expenses	(5,571)	11,346
Other liabilities	(21)	(22)
Net cash provided by operating activities	72,210	81,898
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(3,155)	(13,441)
Rego Park II loan participation payment	(200,000)	0
Principal repayment proceeds from Rego Park II loan participation	725	0
Net cash used in investing activities	(202,430)	(13,441)
CASH FLOWS FROM FINANCING ACTIVITIES
Debt repayments	(302,754)	(2,555)
Proceeds from borrowing	500,000	0
Dividends paid	(65,218)	(61,363)
Debt issuance costs	(11,972)	(16)
Net cash provided by (used in) financing activities	120,056	(63,934)
Net (decrease) increase in cash and cash equivalents and restricted cash	(10,164)	4,523
Cash and cash equivalents and restricted cash at beginning of period	374,678	344,656
Cash and cash equivalents and restricted cash at end of period	364,514	349,179
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents at beginning of period	288,926	259,349
Restricted cash at beginning of period	85,752	85,307
Cash and cash equivalents and restricted cash at beginning of period	374,678	344,656
Cash and cash equivalents at end of period	280,010	264,147
Restricted cash at end of period	84,504	85,032
Cash and cash equivalents and restricted cash at end of period	364,514	349,179
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest	19,358	14,469
NON-CASH TRANSACTIONS
Liability for real estate additions, including $24 and $92 for development fees due to Vornado in 2017 and 2016, respectively	124	1,053
Write-off of fully amortized and/or depreciated assets	4,265	1,691
Change in unrealized net gain or loss on available-for-sale securities	$ (8,494)	$ 96