Real estate acquisitions and amortization of intangibles (Details) - USD ($)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amortization of Deferred Charges [Abstract]
Amortization of Debt Issuance Costs		$ 1,914,000	$ 1,943,000	$ 1,357,000
Amortization of facility fees		1,012,000	1,005,000	713,000
Amortization of deferred leasing costs		25,522,000	22,133,000	18,950,000
Amortization of above and below Market Leases		(2,916,000)	(2,483,000)	(2,565,000)
Amortization of Acquired-in-place lease intangibles		8,649,000	7,942,000	9,489,000
Projected amortization of acquired-in-place lease intangibles [Abstract]
Future Amortization In Place Lease Expense Year One		12,066,000
Future Amortization In Place Lease Expense Year Two		9,356,000
Future Amortization In Place Lease Expense Year Three		6,364,000
Future Amortization In Place Lease Expense Year Four		3,907,000
Future Amortization In Place Lease Expense Year Five		2,949,000
Future Amortization In Place Lease Expense After Year Five		4,016,000
Total acquired in-place lease intangibles, net of accumulated amortization		38,658,000	20,205,000
Asset Acquisition [Abstract]
Land		888,140,000	814,364,000
Buildings and building improvements		3,815,850,000	3,336,615,000
Tenant and other improvements		761,061,000	684,573,000
Right of use assets - Ground leases (operating)	[1]	38,393,000	17,996,000
In-place lease intangibles		59,101,000	39,600,000
Below market lease intangibles		(29,198,000)	(11,451,000)
Commercial Real Estate
Asset Acquisition [Abstract]
Land		41,815,000	44,676,000	127,402,000
Buildings and building improvements		312,911,000	111,082,000	335,335,000
Tenant and other improvements		27,049,000	4,346,000	11,502,000
Right of use assets - Ground leases (operating)		21,836,000	0	0
Total real estate properties acquired		403,611,000	160,104,000	474,239,000
In-place lease intangibles	[2]	27,102,000	7,242,000	11,871,000
Above market lease intangibles	[2]	121,000	0	0
Below market lease intangibles	[3]	(18,987,000)	(2,230,000)	(4,059,000)
Operating lease liabilities - Ground leases	[4]	(21,836,000)	0	0
Total assets acquired, net of liabilities assumed		$ 390,011,000	$ 165,116,000	$ 482,051,000
Weighted Average Remaining Lease Term of Acquired Properties		4 years 1 month 6 days	8 years	3 years 10 months 24 days

[1] See Ground Leases discussion below for information regarding the Company’s right of use assets for ground leases.

[2] 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 terms of the associated leases in place at the time of acquisition.

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

[4] Operating lease liabilities - Ground leases are included in Other liabilities on the Consolidated Balance Sheets. These costs are amortized over the remaining terms of the associated leases in place at the time of acquisition