Annual report pursuant to Section 13 and 15(d)

Orion Office REIT, Receivables and Other Assets - Other Assets (Details)

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Orion Office REIT, Receivables and Other Assets - Other Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Receivables [Abstract]        
Restricted cash $ 34,673 $ 0 $ 3,915 $ 3,719
Operating lease, right-of-use asset, statement of financial position [Extensible Enumeration] Total Total    
Finance lease, right-of-use asset, statement of financial position [Extensible Enumeration] Total Total    
Right-of-use assets, net $ 26,422 $ 30,958    
Investment in unconsolidated joint venture 15,824 18,631    
Derivative assets 6,308 299    
Deferred costs, net 4,619 6,246    
Prepaid expenses 1,305 3,730    
Other assets, net 1,063 637    
Total 90,214 60,501    
Amortization expense for below market right-of-use, less than 200 100 0  
Finance lease, right-of-use asset, after accumulated amortization 9,000 13,800    
Operating lease right-of-use assets 10,600 10,200    
Below market lease, right-of-use asset 6,800 7,100    
Amortization of deferred costs 2,200 300 $ 0  
Accumulated amortization of deferred costs 2,500 300    
Deferred equity offering costs $ 500 $ 0