Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
REAL ESTATE ASSETS:
Land and improvements	$ 1,184,496	$ 1,160,138
Buildings and improvements	5,300,313	5,207,984
Undeveloped land and construction in progress	2,131,358	2,058,510
Total real estate assets held for investment	8,616,167	8,426,632
Accumulated depreciation and amortization	(1,441,506)	(1,391,368)
Total real estate assets held for investment, net	7,174,661	7,035,264
CASH AND CASH EQUIVALENTS	49,693	51,604
RESTRICTED CASH	6,300	119,430
MARKETABLE SECURITIES (Note 10)	24,098	21,779
CURRENT RECEIVABLES, NET (Note 1)	28,016	20,176
DEFERRED RENT RECEIVABLES, NET (Note 1)	280,756	267,007
DEFERRED LEASING COSTS AND ACQUISITION-RELATED INTANGIBLE ASSETS, NET (Note 1)	187,309	197,574
RIGHT OF USE GROUND LEASE ASSETS (Notes 1 and 9)	82,794
PREPAID EXPENSES AND OTHER ASSETS, NET (Note 2)	50,360	52,873
TOTAL ASSETS	7,883,987	7,765,707
LIABILITIES:
Secured debt, net (Notes 3 and 10)	259,878	335,531
Unsecured debt, net (Notes 3 and 10)	2,552,883	2,552,070
Unsecured line of credit (Notes 3, 10 and 15)	185,000	45,000
Accounts payable, accrued expenses and other liabilities	373,691	374,415
Ground lease liabilities (Notes 1 and 9)	87,247
Accrued dividends and distributions (Note 15)	47,676	47,559
Deferred revenue and acquisition-related intangible liabilities, net	138,973	149,646
Rents received in advance and tenant security deposits	55,457	60,225
Total liabilities	3,700,805	3,564,446
COMMITMENTS AND CONTINGENCIES (Note 9)
Stockholders’ Equity (Note 4):
Common stock, $.01 par value, 150,000,000 shares authorized, 100,967,024 and 100,746,988 shares issued and outstanding, respectively	1,010	1,007
Additional paid-in capital	3,976,204	3,976,953
Distributions in excess of earnings (Note 1)	(62,690)	(48,053)
Total stockholders’ equity	3,914,524	3,929,907
Noncontrolling Interests (Notes 1 and 5):
Common units of the Operating Partnership	78,413	78,991
Noncontrolling interests in consolidated property partnerships	190,245	192,363
Total noncontrolling interests	268,658	271,354
Total equity	4,183,182	4,201,261
TOTAL LIABILITIES AND EQUITY (CAPITAL)	$ 7,883,987	$ 7,765,707