Real Estate Owned, Net - Schedule of Real Estate Owned Asset Acquired (Detail) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Real Estate [Line Items]
Acquisition Date Fair Value	$ 591,629,000
Real estate owned, net	588,185,000	$ 0
7 Real Estate Owned Assets
Real Estate [Line Items]
Real estate owned, net	922,900,000
Office, Multifamily, Hospitality | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	645,684,000
Office | Mountain View, CA | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	60,203,000
Office | Burlington, MA | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	64,628,000
Office | Washington, DC | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	107,016,000
Office | El Segundo, CA | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	145,363,000
Office | Denver, CO | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	33,337,000
Multifamily | San Antonio, TX | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	33,607,000
Hospitality | San Francisco, CA | 7 Real Estate Owned Assets
Real Estate [Line Items]
Acquisition Date Fair Value	$ 201,530,000