v3.25.4
Document and Entity Information Document
Feb. 11, 2026
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Feb. 11, 2026
Entity Registrant Name Granite Point Mortgage Trust Inc.
Entity Central Index Key 0001703644
Amendment Flag false
Entity Incorporation, State or Country Code MD
Entity File Number 001-38124
Entity Tax Identification Number 61-1843143
Entity Address, Address Line One 1114 Avenue of the Americas, Suite 3020
Entity Address, City or Town New York,
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10036
City Area Code 212
Local Phone Number 364-5500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
NEW YORK STOCK EXCHANGE, INC. [Member] | Series A Preferred Stock  
Entity Information [Line Items]  
Title of 12(b) Security 7.00% Series A Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share
Trading Symbol GPMTPrA
Security Exchange Name NYSE
NEW YORK STOCK EXCHANGE, INC. [Member] | Common Stock  
Entity Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol GPMT
Security Exchange Name NYSE