Quarterly report pursuant to Section 13 or 15(d)

ACQUISITIONS AND DISPOSITIONS - Narrative (Details)

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ACQUISITIONS AND DISPOSITIONS - Narrative (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
property
shares
Asset Acquisition [Line Items]  
Number of properties acquired | property 12
Estimated fair value of net assets acquired $ 92,900
Acquisition-related costs capitalized 1,000
Value of OP equity $ 16,576
Self storage property | property 1
Proceeds from sale of undeveloped land parcel $ 6,200
Net gain on disposition 2,100
Real estate  
Asset Acquisition [Line Items]  
Recognized fair value allocated to real estate 91,200
Customer in-place leases  
Asset Acquisition [Line Items]  
Recognized fair value allocated to intangible assets $ 1,700
Assets acquired from PROs | Affiliated entity  
Asset Acquisition [Line Items]  
Number of properties acquired | property 1
Estimated fair value of net assets acquired $ 6,600
Northwest's Right to Property Management Contracts, Brand, Intellectual Property, Certain Tangible Assets  
Asset Acquisition [Line Items]  
Estimated fair value of net assets acquired $ 3,200
Northwest's Right to Property Management Contracts, Brand, Intellectual Property, Certain Tangible Assets | OP units | NSA OP, LP  
Asset Acquisition [Line Items]  
Number of shares issued | shares 46,540