CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue, Product and Service [Extensible List]	Service [Member]	Service [Member]
REVENUES
Rental income (Note 5)	$ 290,104	$ 263,208
Other property income	2,698	2,293
Total revenues	292,802	265,501
EXPENSES
Property expenses	53,780	45,424
Real estate taxes	28,228	25,870
Ground leases	2,369	1,826
General and administrative expenses (Note 4)	23,936	22,781
Leasing costs	1,372	1,013
Depreciation and amortization	93,676	88,660
Total expenses	203,361	185,574
OTHER INCOME (EXPENSES)
Interest and other income, net	1,460	81
Interest expense (Note 2)	(25,671)	(20,625)
Total other expenses	(24,211)	(20,544)
NET INCOME	65,230	59,383
Net income attributable to noncontrolling common units of the Operating Partnership	(560)	(516)
Net income attributable to noncontrolling interests in consolidated property partnerships	(8,062)	(5,739)
Total income attributable to noncontrolling interests	(8,622)	(6,255)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 56,608	$ 53,128
Net income available to common stockholders per share – basic (in dollars per share)	$ 0.48	$ 0.45
Net income available to common stockholders per share – diluted (in dollars per share)	$ 0.48	$ 0.45
Weighted average common shares outstanding – basic (in shares)	117,059,329	116,650,228
Weighted average common shares outstanding – diluted (in shares)	117,406,518	117,060,094