Real Estate Investments - Dispositions (Details) $ in Thousands													9 Months Ended
	Sep. 27, 2023 USD ($) ft²	Sep. 18, 2023 USD ($) ft²	Sep. 15, 2023 USD ($) ft²	Aug. 22, 2023 USD ($) ft²	Aug. 02, 2023 USD ($) ft²	Jun. 30, 2023 USD ($) ft²	May 12, 2023 USD ($) a ft²	Mar. 30, 2023 USD ($) ft²	Mar. 23, 2023 USD ($) ft²	Feb. 10, 2023 USD ($) ft²	Jan. 30, 2023 USD ($) ft²	Jan. 12, 2023 USD ($) ft² disposition_transaction property	Sep. 30, 2023 USD ($) ft² property
Real Estate Dispositions [Line Items]
Number of owned real estate properties | property													663
Real Estate Dispositions
Real Estate Dispositions [Line Items]
SALE PRICE													$ 430,772
CLOSING ADJUSTMENTS													(18,951)
COMPANY-FINANCED MORTGAGE NOTES													(45,000)
NET PROCEEDS													366,821
NET REAL ESTATE INVESTMENT													390,485
OTHER (INCLUDING RECEIVABLES)													2,736
GAIN/(IMPAIRMENT)													$ 18,600
SQUARE FOOTAGE | ft²													922,922
Tampa/Miami, FL
Real Estate Dispositions [Line Items]
SALE PRICE												$ 93,250
CLOSING ADJUSTMENTS												(5,875)
COMPANY-FINANCED MORTGAGE NOTES												0
NET PROCEEDS												87,375
NET REAL ESTATE INVESTMENT												87,302
OTHER (INCLUDING RECEIVABLES)												(888)
GAIN/(IMPAIRMENT)												$ 961
SQUARE FOOTAGE | ft²												224,037
Number of owned real estate properties | property												2
Number of property dispositions | disposition_transaction												2
Dallas, TX
Real Estate Dispositions [Line Items]
SALE PRICE			$ 115,000								$ 19,210
CLOSING ADJUSTMENTS			(1,504)								(141)
COMPANY-FINANCED MORTGAGE NOTES			0								0
NET PROCEEDS			113,496								19,069
NET REAL ESTATE INVESTMENT			64,183								18,986
OTHER (INCLUDING RECEIVABLES)			6,094								43
GAIN/(IMPAIRMENT)			$ 43,219								$ 40
SQUARE FOOTAGE | ft²			161,264								36,691
Joint venture, ownership (in percentage)											40.00%
St. Louis, MO
Real Estate Dispositions [Line Items]
SALE PRICE										$ 350
CLOSING ADJUSTMENTS										(18)
COMPANY-FINANCED MORTGAGE NOTES										0
NET PROCEEDS										332
NET REAL ESTATE INVESTMENT										398
OTHER (INCLUDING RECEIVABLES)										0
GAIN/(IMPAIRMENT)										$ (66)
SQUARE FOOTAGE | ft²										6,500
Los Angeles, CA
Real Estate Dispositions [Line Items]
SALE PRICE							$ 3,300	$ 75,000	$ 21,000
CLOSING ADJUSTMENTS							(334)	(8,079)	(526)
COMPANY-FINANCED MORTGAGE NOTES							0	(45,000)	0
NET PROCEEDS							2,966	21,921	20,474
NET REAL ESTATE INVESTMENT							3,268	88,624	20,610
OTHER (INCLUDING RECEIVABLES)							0	(803)	52
GAIN/(IMPAIRMENT)							$ (302)	$ (20,900)	$ (188)
SQUARE FOOTAGE | ft²							0	147,078	37,165
Mortgage note								$ 45,000
Albany, NY
Real Estate Dispositions [Line Items]
SALE PRICE						$ 10,000
CLOSING ADJUSTMENTS						(1,229)
COMPANY-FINANCED MORTGAGE NOTES						0
NET PROCEEDS						8,771
NET REAL ESTATE INVESTMENT						2,613
OTHER (INCLUDING RECEIVABLES)						(1,040)
GAIN/(IMPAIRMENT)						$ 7,198
SQUARE FOOTAGE | ft²						40,870
Area of land | a							0.34
Houston, TX
Real Estate Dispositions [Line Items]
SALE PRICE		$ 250			$ 8,320
CLOSING ADJUSTMENTS		(24)			(285)
COMPANY-FINANCED MORTGAGE NOTES		0			0
NET PROCEEDS		226			8,035
NET REAL ESTATE INVESTMENT		1,998			4,567
OTHER (INCLUDING RECEIVABLES)		0			194
GAIN/(IMPAIRMENT)		$ (1,772)			$ 3,274
SQUARE FOOTAGE | ft²		52,040			57,170
Atlanta, GA
Real Estate Dispositions [Line Items]
SALE PRICE				$ 25,142
CLOSING ADJUSTMENTS				(66)
COMPANY-FINANCED MORTGAGE NOTES				0
NET PROCEEDS				25,076
NET REAL ESTATE INVESTMENT				23,226
OTHER (INCLUDING RECEIVABLES)				(536)
GAIN/(IMPAIRMENT)				$ 2,386
SQUARE FOOTAGE | ft²				55,195
Chicago, IL
Real Estate Dispositions [Line Items]
SALE PRICE	$ 59,950
CLOSING ADJUSTMENTS	(870)
COMPANY-FINANCED MORTGAGE NOTES	0
NET PROCEEDS	59,080
NET REAL ESTATE INVESTMENT	74,710
OTHER (INCLUDING RECEIVABLES)	(380)
GAIN/(IMPAIRMENT)	$ (15,250)
SQUARE FOOTAGE | ft²	104,912