Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 16,903	$ 29,148
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	17,792	18,278
Straight-lining of rental income	8,820	1,313
Write-off of tenant receivables	1,022	0
Stock-based compensation	600	394
Change in fair value of marketable securities	9,558	5,240
Dividends received in stock	(214)	0
Changes in operating assets and liabilities:
Tenant and other receivables, net	(2,646)	(652)
Other assets	1,687	(2,054)
Amounts due to Vornado	(692)	2,679
Accounts payable and accrued expenses	241	(3,246)
Other liabilities	(315)	(302)
Net cash provided by operating activities	52,756	50,798
CASH FLOWS FROM INVESTING ACTIVITIES
Construction in progress and real estate additions	(13,009)	(4,901)
Net cash used in investing activities	(13,009)	(4,901)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid	(46,068)	(46,056)
Debt issuance costs	(99)	(14)
Proceeds from borrowing	145,708	0
Net cash provided by (used in) financing activities	99,541	(46,070)
Net increase (decrease) in cash and cash equivalents and restricted cash	139,288	(173)
Cash and cash equivalents and restricted cash at beginning of period	313,977	289,495
Cash and cash equivalents and restricted cash at end of period	453,265	289,322
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents at beginning of period	298,063	283,056
Restricted cash at beginning of period	15,914	6,439
Cash and cash equivalents and restricted cash at beginning of period	313,977	289,495
Cash and cash equivalents at end of period	441,905	283,948
Restricted cash at end of period	11,360	5,374
Cash and cash equivalents and restricted cash at end of period	453,265	289,322
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash payments for interest	13,510	18,107
NON-CASH TRANSACTIONS
Liability for real estate additions, including $269 and $29 for development fees due to Vornado in 2020 and 2019, respectively	3,289	791
Write-off of fully amortized and/or depreciated assets	367	0
Lease liability arising from the recognition of right-of-use asset	0	5,428
Reclassification of prepaid real estate taxes to construction in progress for property in redevelopment	$ 0	$ 1,466