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Real Estate Investments - Dispositions (Details) $ in Thousands																9 Months Ended
	Sep. 30, 2025 USD ($) ft² property	Sep. 29, 2025 USD ($) ft²	Aug. 29, 2025 USD ($) ft²	Aug. 27, 2025 USD ($) ft²	Aug. 25, 2025 USD ($)	Jul. 30, 2025 USD ($) ft²	Jul. 29, 2025 USD ($) ft²	Jul. 15, 2025 USD ($) ft²	Jun. 27, 2025 USD ($) ft²	Jun. 26, 2025 USD ($) ft²	May 23, 2025 USD ($) ft²	Apr. 30, 2025 USD ($) ft²	Mar. 20, 2025 USD ($) ft²	Feb. 14, 2025 USD ($) ft²	Feb. 07, 2025 USD ($) ft²	Sep. 30, 2025 USD ($) ft² property	Oct. 31, 2025 USD ($) ft²	Oct. 28, 2025 USD ($) ft²	Oct. 16, 2025 USD ($) ft²
Joint Venture | Two Medical Outpatient Properties
Real Estate Dispositions [Line Items]
Number of owned real estate properties | property	2															2
Joint Venture | Three Medical Outpatient Properties
Real Estate Dispositions [Line Items]
Number of owned real estate properties | property	3															3
Joint Venture | Four Medical Outpatient Properties
Real Estate Dispositions [Line Items]
Number of owned real estate properties | property	4															4
Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE	$ 477,561															$ 477,561
CLOSING ADJUSTMENTS	(24,833)															(24,833)
COMPANY-FINANCED MORTGAGE NOTES	(5,400)															(5,400)
NET PROCEEDS																447,328
NET REAL ESTATE INVESTMENT	369,324															369,324
OTHER (INCLUDING RECEIVABLES)	$ 7,921															7,921
GAIN/(IMPAIRMENT)																$ 75,483
SQUARE FOOTAGE | ft²	2,015,438															2,015,438
Real Estate Dispositions | Subsequent event
Real Estate Dispositions [Line Items]
SALE PRICE																	$ 7,950
SQUARE FOOTAGE | ft²																	152,655
Boston, MA | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE				$ 450							$ 3,000	$ 486			$ 4,500
CLOSING ADJUSTMENTS				(45)							(36)	(47)			(135)
COMPANY-FINANCED MORTGAGE NOTES				0							0	0			0
NET PROCEEDS					$ 405						2,964	439			4,365
NET REAL ESTATE INVESTMENT				413							2,631	60			4,325
OTHER (INCLUDING RECEIVABLES)				$ 32							27	2			15
GAIN/(IMPAIRMENT)					$ (40)						$ 306	$ 377			$ 25
SQUARE FOOTAGE | ft²				9,010							33,176	0			30,304
Denver, CO | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE														$ 8,600
CLOSING ADJUSTMENTS														(2,144)
COMPANY-FINANCED MORTGAGE NOTES														0
NET PROCEEDS														6,456
NET REAL ESTATE INVESTMENT														7,948
OTHER (INCLUDING RECEIVABLES)														113
GAIN/(IMPAIRMENT)														$ (1,605)
SQUARE FOOTAGE | ft²														69,715
Houston, TX | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE									$ 10,500				$ 15,000
CLOSING ADJUSTMENTS									(15)				(4,087)
COMPANY-FINANCED MORTGAGE NOTES									0				(5,400)
NET PROCEEDS									10,485				5,513
NET REAL ESTATE INVESTMENT									10,250				14,343
OTHER (INCLUDING RECEIVABLES)									42				347
GAIN/(IMPAIRMENT)									$ 193				$ (3,777)
SQUARE FOOTAGE | ft²									0				127,933
Jacksonville, FL | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE										$ 8,100
CLOSING ADJUSTMENTS										(11)
COMPANY-FINANCED MORTGAGE NOTES										0
NET PROCEEDS										8,089
NET REAL ESTATE INVESTMENT										23,064
OTHER (INCLUDING RECEIVABLES)										(529)
GAIN/(IMPAIRMENT)										$ (14,446)
SQUARE FOOTAGE | ft²										53,169
Yakima, WA | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE										$ 31,000
CLOSING ADJUSTMENTS										(2,256)
COMPANY-FINANCED MORTGAGE NOTES										0
NET PROCEEDS										28,744
NET REAL ESTATE INVESTMENT										8,689
OTHER (INCLUDING RECEIVABLES)										343
GAIN/(IMPAIRMENT)										$ 19,712
SQUARE FOOTAGE | ft²										91,561
South Bend, IN | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE								$ 43,100
CLOSING ADJUSTMENTS								(283)
COMPANY-FINANCED MORTGAGE NOTES								0
NET PROCEEDS								42,817
NET REAL ESTATE INVESTMENT								29,481
OTHER (INCLUDING RECEIVABLES)								(7)
GAIN/(IMPAIRMENT)								$ 13,343
SQUARE FOOTAGE | ft²								205,573
Milwaukee, WI | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE		$ 60,000					$ 42,000
CLOSING ADJUSTMENTS		(2,203)					(913)
COMPANY-FINANCED MORTGAGE NOTES		0					0
NET PROCEEDS		57,797					41,087
NET REAL ESTATE INVESTMENT		61,485					40,644
OTHER (INCLUDING RECEIVABLES)		(2,884)					270
GAIN/(IMPAIRMENT)		$ (804)					$ 173
SQUARE FOOTAGE | ft²		220,747					147,406
Naples, FL | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE							$ 19,250
CLOSING ADJUSTMENTS							(2,692)
COMPANY-FINANCED MORTGAGE NOTES							0
NET PROCEEDS							16,558
NET REAL ESTATE INVESTMENT							15,586
OTHER (INCLUDING RECEIVABLES)							559
GAIN/(IMPAIRMENT)							$ 413
SQUARE FOOTAGE | ft²							61,359
New York, NY | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE						$ 25,000
CLOSING ADJUSTMENTS						(1,290)
COMPANY-FINANCED MORTGAGE NOTES						0
NET PROCEEDS						23,710
NET REAL ESTATE INVESTMENT						15,531
OTHER (INCLUDING RECEIVABLES)						364
GAIN/(IMPAIRMENT)						$ 7,815
SQUARE FOOTAGE | ft²						89,893
Lakeland, FL | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE				$ 7,325
CLOSING ADJUSTMENTS				(772)
COMPANY-FINANCED MORTGAGE NOTES				0
NET PROCEEDS				6,553
NET REAL ESTATE INVESTMENT				6,899
OTHER (INCLUDING RECEIVABLES)				234
GAIN/(IMPAIRMENT)				$ (580)
SQUARE FOOTAGE | ft²				31,158
Salem, OR | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE			$ 4,000
CLOSING ADJUSTMENTS			(427)
COMPANY-FINANCED MORTGAGE NOTES			0
NET PROCEEDS			3,573
NET REAL ESTATE INVESTMENT			3,482
OTHER (INCLUDING RECEIVABLES)			159
GAIN/(IMPAIRMENT)			$ (68)
SQUARE FOOTAGE | ft²			21,026
Tampa, FL | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE	$ 22,000															$ 22,000
CLOSING ADJUSTMENTS	(778)															(778)
COMPANY-FINANCED MORTGAGE NOTES	0															0
NET PROCEEDS	21,222
NET REAL ESTATE INVESTMENT	6,218															6,218
OTHER (INCLUDING RECEIVABLES)	646															$ 646
GAIN/(IMPAIRMENT)	$ 14,358
SQUARE FOOTAGE | ft²	47,962															47,962
Dallas, TX | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE	$ 58,800															$ 58,800
CLOSING ADJUSTMENTS	(1,885)															(1,885)
COMPANY-FINANCED MORTGAGE NOTES	0															0
NET PROCEEDS	56,915
NET REAL ESTATE INVESTMENT	26,822															26,822
OTHER (INCLUDING RECEIVABLES)	5,379															$ 5,379
GAIN/(IMPAIRMENT)	$ 24,714
SQUARE FOOTAGE | ft²	448,879															448,879
Chicago, IL | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE	$ 18,700															$ 18,700
CLOSING ADJUSTMENTS	(477)															(477)
COMPANY-FINANCED MORTGAGE NOTES	0															0
NET PROCEEDS	18,223
NET REAL ESTATE INVESTMENT	18,417															18,417
OTHER (INCLUDING RECEIVABLES)	(181)															$ (181)
GAIN/(IMPAIRMENT)	$ (13)
SQUARE FOOTAGE | ft²	56,531															56,531
Columbus, OH | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE	$ 33,750															$ 33,750
CLOSING ADJUSTMENTS	(2,470)															(2,470)
COMPANY-FINANCED MORTGAGE NOTES	0															0
NET PROCEEDS	31,280
NET REAL ESTATE INVESTMENT	27,884															27,884
OTHER (INCLUDING RECEIVABLES)	410															$ 410
GAIN/(IMPAIRMENT)	$ 2,986
SQUARE FOOTAGE | ft²	117,060															117,060
Miami, FL | Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE	$ 62,000															$ 62,000
CLOSING ADJUSTMENTS	(1,867)															(1,867)
COMPANY-FINANCED MORTGAGE NOTES	0															0
NET PROCEEDS	60,133
NET REAL ESTATE INVESTMENT	45,152															45,152
OTHER (INCLUDING RECEIVABLES)	2,580															$ 2,580
GAIN/(IMPAIRMENT)	$ 12,401
SQUARE FOOTAGE | ft²	152,976															152,976
New Haven, CT | Real Estate Dispositions | Subsequent event
Real Estate Dispositions [Line Items]
SALE PRICE																			$ 725
SQUARE FOOTAGE | ft²																			0
Des Moines, IA | Real Estate Dispositions | Subsequent event
Real Estate Dispositions [Line Items]
SALE PRICE																		$ 7,225
SQUARE FOOTAGE | ft²																		152,655

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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