REAL ESTATE PROPERTIES - Development and Value-Add Disclosures (Details)		12 Months Ended
		Dec. 31, 2023 USD ($) ft²	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Real Estate [Line Items]
Interest costs capitalized on development properties		$ 16,235,000	$ 12,393,000	$ 9,028,000
Internal Development Costs Capitalized During Period		10,472,000	9,985,000	7,713,000
Development costs incurred, for the period		388,213,000	$ 494,073,000	$ 418,855,000
Improvement costs on development and value-add properties		301,596,000
Costs to develop land		70,664,000
Costs subsequent to transfer, development transfers during the period		$ 15,953,000
Lease Up [Member]
Real Estate [Line Items]
Actual or estimated building size | ft²		1,352,000
Cumulative Development Costs		$ 162,356,000
Projected total costs		$ 180,600,000
Under construction [Member]
Real Estate [Line Items]
Actual or estimated building size | ft²		2,725,000
Cumulative Development Costs		$ 212,568,000
Projected total costs		$ 395,100,000
Lease-Up and Under Construction [Member]
Real Estate [Line Items]
Actual or estimated building size | ft²		4,077,000
Cumulative Development Costs		$ 374,924,000
Projected total costs		$ 575,700,000
Prospective Development (primarily land) [Member]
Real Estate [Line Items]
Actual or estimated building size | ft²		10,792,000
Cumulative Development Costs		$ 264,723,000
Lease Up, Construction, And Prospective Development [Member]
Real Estate [Line Items]
Actual or estimated building size | ft²		14,869,000
Cumulative Development Costs		$ 639,647,000
Development completed and transferred to Real estate properties [Member]
Real Estate [Line Items]
Actual or estimated building size | ft²		2,341,000
Cumulative Development Costs	[1]	$ 271,568,000

[1] Represents cumulative costs at the date of transfer.