CONSOLIDATED STATEMENTS OF CASH FLOWS - Unaudited - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
OPERATING ACTIVITIES
Net Income	$ 48,910	$ 44,704	$ 37,817	$ 63,604	$ 137,079	$ 147,586
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	42,521		39,277		125,830	113,079
Stock-based compensation expense					6,835	6,530
Gain on sales of real estate investments					(4,809)	(40,999)
Gain on sales of non-operating real estate					(446)	0
Gain on involuntary conversion and business interruption claims					(4,187)	0
Changes in operating assets and liabilities:
Accrued income and other assets					(11,986)	(2,743)
Accounts payable, accrued expenses and prepaid rent					50,434	52,496
Other					1,349	602
NET CASH PROVIDED BY OPERATING ACTIVITIES					300,099	276,551
INVESTING ACTIVITIES
Development and value-add properties					(286,256)	(395,313)
Purchases of real estate					(87,338)	(2,049)
Real estate improvements					(42,097)	(31,043)
Net proceeds from sales of real estate investments					13,821	51,006
Leasing commissions					(22,712)	(26,968)
Proceeds from involuntary conversion on real estate assets					1,339	0
Changes in accrued development costs					26,724	22,141
Changes in accrued development costs					(7,060)	3,328
NET CASH USED IN INVESTING ACTIVITIES					(389,459)	(385,554)
FINANCING ACTIVITIES
Proceeds from unsecured bank credit facilities					334,230	695,726
Repayments on unsecured bank credit facilities					(504,230)	(749,053)
Proceeds from unsecured debt					100,000	375,000
Repayments of unsecured debt					(115,000)	(75,000)
Repayments on secured debt					(1,970)	(60,070)
Debt issuance costs					(1,796)	(1,617)
Distributions paid to stockholders (not including dividends accrued)					(166,960)	(139,597)
Proceeds from common stock offerings					450,869	75,379
Common stock offering related costs					(484)	(190)
Other					(4,981)	(11,120)
NET CASH PROVIDED BY FINANCING ACTIVITIES					89,678	109,458
INCREASE IN CASH AND CASH EQUIVALENTS
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD		$ 56		$ 4,393	56	4,393	$ 4,393
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 374		$ 4,848		374	4,848	$ 56
INCREASE IN CASH AND CASH EQUIVALENTS					318	455
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest, net of amounts capitalized of $11,864 and $8,515 for 2023 and 2022, respectively					30,888	21,550
Interest capitalized					11,864	8,515
Cash paid for operating lease liabilities					1,620	1,445
Common stock issued in the purchase of real estate					0	303,682
Debt assumed in the purchase of real estate					0	60,000
NON-CASH OPERATING ACTIVITY [Abstract]
Operating lease liabilities arising from obtaining right of use assets					$ 0	$ 398