Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS - Northwest Retirement (Details)

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SUBSEQUENT EVENTS - Northwest Retirement (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2022
Dec. 31, 2021
Subordinated performance units    
Subsequent Event [Line Items]    
Period prior to conversion for conversion rate metric   1 year
Percentage of CAD per unit used in conversion rate calculation   110.00%
Subsequent Event    
Subsequent Event [Line Items]    
PRO retirement, contractual formula, equity interests issued and issuable $ 3.2  
Period prior to conversion for conversion rate metric 2 years  
Subsequent Event | OP units    
Subsequent Event [Line Items]    
PRO retirement, contractual formula, equity interests issued and issuable (in shares) 46,540  
Number of units converted (in units) 3,911,260  
Subsequent Event | Subordinated performance units    
Subsequent Event [Line Items]    
Number of units converted (in units) 2,078,357  
Percentage of CAD per unit used in conversion rate calculation 110.00%