v3.26.1
Cover Document
Aug. 05, 2026
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Aug. 05, 2026
Entity Registrant Name MFA FINANCIAL, INC.
Entity Incorporation, State or Country Code MD
Entity File Number 1-13991
Entity Tax Identification Number 13-3974868
Entity Address, Address Line One 12 East 49th Street11th Floor - Suite 825
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10017
City Area Code 212
Local Phone Number 207-6400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001055160
Amendment Flag false
Former Address  
Document Information [Line Items]  
Entity Address, Address Line One One Vanderbilt Ave., 48th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10017
Common Stock, par value $0.01 per share  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol MFA
Security Exchange Name NYSE
7.50% Series B Cumulative Redeemable Preferred Stock, par value $0.01 per share  
Document Information [Line Items]  
Title of 12(b) Security 7.50% Series B Cumulative Redeemable Preferred Stock, par value $0.01 per share
Trading Symbol MFA/PB
Security Exchange Name NYSE
6.50% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share  
Document Information [Line Items]  
Title of 12(b) Security 6.50% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share
Trading Symbol MFA/PC
Security Exchange Name NYSE
8.875% Senior Notes due 2029  
Document Information [Line Items]  
Title of 12(b) Security 8.875% Senior Notes due 2029
Trading Symbol MFAN
Security Exchange Name NYSE
9.00% Senior Notes due 2029  
Document Information [Line Items]  
Title of 12(b) Security 9.00% Senior Notes due 2029
Trading Symbol MFAO
Security Exchange Name NYSE