Real Estate - Summary of Purchase Price Allocation (Details) - Mergers $ in Thousands	Mar. 01, 2021 USD ($)
Real Estate [Line Items]
Cash assumed	$ 2,721
Land	143,724
Building and improvements	992,779
Tenant origination and absorption cost	152,793
In-place lease valuation (above market)	11,591
Intangibles	27,788
Other assets	1,690
Total assets	1,333,086
Debt	415,926
In-place lease valuation (below market)	10,026
Lease liability	4,616
Accounts payable and other liabilities	20,604
Total liabilities	451,172
Fair value of net assets acquired	881,914
Less: GRT's CCIT II Merger expenses	43,599
Fair value of net assets acquired, less GRT's CCIT II Merger expenses	$ 838,315