v3.25.2
Document And Entity Information
Jul. 31, 2025
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 31, 2025
Entity Registrant Name City Office REIT, Inc.
Entity Central Index Key 0001593222
Entity Emerging Growth Company false
Entity File Number 001-36409
Entity Incorporation, State or Country Code MD
Entity Tax Identification Number 98-1141883
Entity Address, Address Line One 666 Burrard Street
Entity Address, Address Line Two Suite 3210
Entity Address, City or Town Vancouver
Entity Address, State or Province BC
Entity Address, Postal Zip Code V6C 2X8
City Area Code (604)
Local Phone Number 806-3366
Entity Information, Former Legal or Registered Name Not Applicable
Written Communications false
Soliciting Material true
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Series A Preferred Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security 6.625% Series A Cumulative Redeemable Preferred Stock, $0.01 par value per share
Trading Symbol CIO.PrA
Security Exchange Name NYSE
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, $0.01 par value
Trading Symbol CIO
Security Exchange Name NYSE