SIGNIFICANT ACCOUNTING POLICIES (Details 3)		12 Months Ended
		Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) Integer	Dec. 31, 2020 USD ($)
Accounting Policies [Abstract]
Amortization of debt issuance costs		$ 1,358,000	$ 1,296,000	$ 1,418,000
Amortization of facility fees		713,000	751,000	790,000
Leasing costs amortization expense		18,950,000	16,209,000	14,449,000
Rental Income (Increase) Decrease For Amortization Of Acquired In Place Lease Intangibles		(2,565,000)	(1,048,000)	(1,451,000)
Amortization of Intangible Assets		9,489,000	5,980,000	5,620,000
Future Amortization In Place Lease Expense Year One		7,353,000
Future Amortization In Place Lease Expense Year Two		5,561,000
Future Amortization In Place Lease Expense Year Three		4,343,000
Future Amortization In Place Lease Expense Year Four		2,482,000
Future Amortization In Place Lease Expense Year Five		652,000
Real Estate Properties
Land		730,445,000	544,505,000
Buildings and building improvements		3,012,319,000	2,408,944,000
Tenant and other improvements		633,817,000	570,627,000
In-place lease intangibles		37,181,000	31,561,000
Below market lease intangibles		(10,735,000)	$ (8,124,000)
Real estate properties, Held-for-sale
Real Estate Properties
Number of Real Estate Properties | Integer			1
2021 acquisitions
Real Estate Properties
Land			$ 42,554,000
Buildings and building improvements			225,645,000
Tenant and other improvements			4,907,000
Right of use assets - Ground leases (operating)			12,708,000
Real Estate Investment Property, at Cost			285,814,000
In-place lease intangibles	[1]		9,949,000
Total assets acquired, net of liabilities assumed			$ 279,225,000
Weighted Average Remaining Lease Term of Acquired Properties			2 years 10 months 24 days
2021 acquisitions | Above Market Leases [Member]
Real Estate Properties
Above market lease intangibles	[1]		$ 6,000
2021 acquisitions | Below market lease [Member]
Real Estate Properties
Below market lease intangibles	[2]		(3,836,000)
2021 acquisitions | Operating lease liabilities - ground leases
Real Estate Properties
Operating lease liabilities - Ground leases	[3]		$ (12,708,000)
2020 Acquisitions [Member]
Real Estate Properties
Land				23,565,000
Buildings and building improvements				42,024,000
Tenant and other improvements				7,971,000
Right of use assets - Ground leases (operating)				0
Real Estate Investment Property, at Cost				73,560,000
In-place lease intangibles	[1]			3,257,000
Total assets acquired, net of liabilities assumed				$ 76,518,000
Weighted Average Remaining Lease Term of Acquired Properties				3 years 10 months 24 days
2020 Acquisitions [Member] | Above Market Leases [Member]
Real Estate Properties
Above market lease intangibles	[1]			$ 104,000
2020 Acquisitions [Member] | Below market lease [Member]
Real Estate Properties
Below market lease intangibles	[2]			(403,000)
2020 Acquisitions [Member] | Operating lease liabilities - ground leases
Real Estate Properties
Operating lease liabilities - Ground leases	[3]			$ 0
2022 Acquisitions
Real Estate Properties
Land		127,402,000
Buildings and building improvements		335,335,000
Tenant and other improvements		11,502,000
Right of use assets - Ground leases (operating)		0
Real Estate Investment Property, at Cost		474,239,000
In-place lease intangibles	[1]	11,871,000
Total assets acquired, net of liabilities assumed		$ 482,051,000
Weighted Average Remaining Lease Term of Acquired Properties		3 years 10 months 24 days
2022 Acquisitions | Above Market Leases [Member]
Real Estate Properties
Above market lease intangibles	[1]	$ 0
2022 Acquisitions | Below market lease [Member]
Real Estate Properties
Below market lease intangibles	[2]	(4,059,000)
2022 Acquisitions | Operating lease liabilities - ground leases
Real Estate Properties
Operating lease liabilities - Ground leases	[3]	$ 0

[1] In-place lease intangibles and above market lease intangibles are each included in Other assets on the Consolidated Balance Sheets. These costs are amortized over the remaining lives of the associated leases in place at the time of acquisition.

[2] Below market lease intangibles are included in Other liabilities on the Consolidated Balance Sheets. These costs are amortized over the remaining lives of the associated leases in place at the time of acquisition.

[3] Operating lease liabilities - Ground leases are included in Other liabilities on the Consolidated Balance Sheets.