Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 43,786	$ 35,163
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	18,981	16,061
Straight-lining of rental income	910	(943)
Stock-based compensation expense	450	600
Change in operating assets and liabilities:
Tenant and other receivables, net	1,495	(997)
Other assets	(34,112)	(23,769)
Amounts due to Vornado	(1,607)	(84)
Accounts payable and accrued expenses	2,851	(1,002)
Other liabilities	(15)	(15)
Net cash provided by operating activities	32,739	25,014
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(11,146)	(29,356)
Change in restricted cash	(2,581)	116
Proceeds from maturing short-term investments	0	24,998
Net cash used in investing activities	(13,727)	(4,242)
CASH FLOWS FROM FINANCING ACTIVITIES
Debt repayments	(1,687)	(1,567)
Dividends paid	(40,905)	(35,780)
Debt issuance costs	(16)	(10)
Net cash used in financing activities	(42,608)	(37,357)
Net decrease in cash and cash equivalents	(23,596)	(16,585)
Cash and cash equivalents at beginning of period	259,349	227,815
Cash and cash equivalents at end of period	235,753	211,230
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest, excluding capitalized interest of $1,017 in 2015	9,496	12,518
NON-CASH TRANSACTIONS
Liability for real estate additions, including $74 and $5,042 for development fees due to Vornado in 2016 and 2015, respectively	1,401	15,662
Write-off of fully amortized and/or depreciated assets	$ 1,591	$ 83