v3.26.1
Variable Interest Entities and Securitized Debt Obligations - Schedule of Variable Interest Entities (Details) - USD ($)
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Variable Interest Entity [Line Items]            
Loans held-for-investment $ 1,389,380,000 $ 1,510,097,000 $ 1,683,644,000 $ 1,823,279,000 $ 1,937,659,000 $ 2,097,375,000
Allowance for credit losses (163,484,000) (147,298,000) (145,912,000) (151,968,000) (177,282,000) (199,727,000)
Loans held-for-investment, net 1,225,896,000 $ 1,362,799,000 1,537,732,000 $ 1,671,311,000 $ 1,760,377,000 $ 1,897,648,000
Restricted cash 48,994,000   14,108,000      
Other assets 31,786,000   37,793,000      
Total Assets [1] 1,462,754,000   1,755,224,000      
Securitized debt obligations 521,646,000   643,528,000      
Other liabilities 15,898,000   24,227,000      
Total Liabilities [1] 982,357,000   1,202,412,000      
Collateral assets(2)            
Variable Interest Entity [Line Items]            
Securitized debt obligations 672,153,000   801,997,000      
Collateral assets(2) | Asset Pledged as Collateral | CRE CLO financing activities            
Variable Interest Entity [Line Items]            
Restricted cash 48,700,000          
Collateral assets(2) | GPMT 2021-FL4 CRE CLO            
Variable Interest Entity [Line Items]            
Securitized debt obligations 399,105,000   446,569,000      
Collateral assets(2) | GPMT 2021-FL4 CRE CLO | Asset Pledged as Collateral | CRE CLO financing activities            
Variable Interest Entity [Line Items]            
Restricted cash 11,200,000   31,000.0      
Collateral assets(2) | GPMT 2021-FL3 CRE CLO            
Variable Interest Entity [Line Items]            
Securitized debt obligations 273,048,000   355,428,000      
Collateral assets(2) | GPMT 2021-FL3 CRE CLO | Asset Pledged as Collateral | CRE CLO financing activities            
Variable Interest Entity [Line Items]            
Restricted cash 37,500,000   0      
Variable Interest Entity, Primary Beneficiary            
Variable Interest Entity [Line Items]            
Loans held-for-investment 644,975,000   823,655,000      
Allowance for credit losses (21,500,000)   (21,689,000)      
Loans held-for-investment, net 623,475,000   801,966,000      
Restricted cash 48,679,000   31,000.0      
Other assets 5,487,000   5,054,000      
Total Assets 677,641,000   807,051,000      
Securitized debt obligations 521,646,000   643,528,000      
Other liabilities 884,000   1,273,000      
Total Liabilities $ 522,530,000   $ 644,801,000      
[1] The condensed consolidated balance sheets include assets of consolidated variable interest entities, or VIEs, that can only be used to settle obligations of these VIEs, and liabilities of the consolidated VIEs for which creditors do not have recourse to Granite Point Mortgage Trust Inc. At June 30, 2026, and December 31, 2025, assets of the VIEs totaled $677,641 and $807,051, respectively, and liabilities of the VIEs totaled $522,530 and $644,801, respectively. See Note 5 - Variable Interest Entities and Securitized Debt Obligations, for further detail.