Real Estate Properties - Acquisition Activities (Details) ft² in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2019 USD ($)	Dec. 31, 2021 USD ($) ft² property	Dec. 31, 2020 USD ($) ft² property
Business Acquisition [Line Items]
Number of properties acquired | property		3	2
Rentable Square Feet (in square feet) | ft²		926	163
Asset acquisition, consideration transferred		$ 576,478	$ 47,215
Purchase price adjustments		1,761
Asset acquisition, acquisition related costs		1,264	590
Assumed Real Estate Lease Obligations		(9,088)
Land
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		72,078	7,649
Buildings and Improvements
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		404,024	31,772
Acquired Real Estate Leases
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		$ 109,464	$ 7,794
Chicago, IL
Business Acquisition [Line Items]
Number of properties acquired | property		1
Rentable Square Feet (in square feet) | ft²		531
Asset acquisition, consideration transferred		$ 368,331
Assumed Real Estate Lease Obligations		(9,088)
Adjustment for estimated tax liability		13,031
Chicago, IL | Land
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		42,935
Chicago, IL | Buildings and Improvements
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		258,348
Chicago, IL | Acquired Real Estate Leases
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		$ 76,136
Atlanta, GA
Business Acquisition [Line Items]
Number of properties acquired | property		1
Rentable Square Feet (in square feet) | ft²		346
Asset acquisition, consideration transferred		$ 180,602
Assumed Real Estate Lease Obligations		0
Atlanta, GA | Land
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		13,040
Atlanta, GA | Buildings and Improvements
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		135,459
Atlanta, GA | Acquired Real Estate Leases
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		$ 32,103
Boston, MA
Business Acquisition [Line Items]
Number of properties acquired | property		1	1
Rentable Square Feet (in square feet) | ft²		49	13
Asset acquisition, consideration transferred	$ 2,900	$ 27,545	$ 11,864
Assumed Real Estate Lease Obligations		0
Boston, MA | Land
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		16,103	2,618
Boston, MA | Buildings and Improvements
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		10,217	9,246
Boston, MA | Acquired Real Estate Leases
Business Acquisition [Line Items]
Asset acquisition, consideration transferred		$ 1,225	$ 0
Fort Mill, SC
Business Acquisition [Line Items]
Number of properties acquired | property			1
Rentable Square Feet (in square feet) | ft²			150
Asset acquisition, consideration transferred			$ 35,351
Fort Mill, SC | Land
Business Acquisition [Line Items]
Asset acquisition, consideration transferred			5,031
Fort Mill, SC | Buildings and Improvements
Business Acquisition [Line Items]
Asset acquisition, consideration transferred			22,526
Fort Mill, SC | Acquired Real Estate Leases
Business Acquisition [Line Items]
Asset acquisition, consideration transferred			$ 7,794