Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 35,163	$ 32,072
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	16,061	15,876
Straight-lining of rental income	(943)	(1,282)
Stock-based compensation expense	600	394
Change in operating assets and liabilities:
Tenant and other receivables, net	(997)	642
Other assets	(23,769)	(22,169)
Amounts due to Vornado	(84)	(818)
Accounts payable and accrued expenses	(1,002)	(2,448)
Other liabilities	(15)	(5)
Net cash provided by operating activities	25,014	22,262
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(29,356)	(13,362)
Change in restricted cash	116	4,457
Proceeds from maturing short-term investments	24,998	0
Net cash used in investing activities	(4,242)	(8,905)
CASH FLOWS FROM FINANCING ACTIVITIES
Debt repayments	(1,567)	(315,670)
Proceeds from borrowing	0	300,000
Dividends paid	(35,780)	(33,213)
Debt issuance costs	(10)	(4,263)
Net cash used in financing activities	(37,357)	(53,146)
Net decrease in cash and cash equivalents	(16,585)	(39,789)
Cash and cash equivalents at beginning of period	227,815	347,718
Cash and cash equivalents at end of period	211,230	307,929
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest, excluding capitalized interest of $1,017 and $85, respectively	12,518	17,238
NON-CASH TRANSACTIONS
Liability for real estate additions (including $5,042 due to Vornado in 2015)	15,662	8,850
Write-off of fully amortized and/or depreciated assets	$ 83	$ 10,569