Transactions With Related Parties - Incurred Amounts by Related Parties (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($) asset	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) asset	Jun. 30, 2024 USD ($)
Revantage Corporate Services, LLC and Revantage Global Services Europe S.à r.l, EQ Management, LLC, BRE Hotels & Resorts, LLC LivCor, LLC, NNN PortCo - Reliant | Related Party
Related Party Transaction [Line Items]
Related party transaction	$ 2,456	$ 353	$ 3,641	$ 604
Brio Real Estate Services, LLC, Brio Real Estate (UK) Ltd And Brio Real Estate (AUS) Pty Ltd | Related Party
Related Party Transaction [Line Items]
Related party transaction	1,101	0	1,101	0
Revantage Corporate Services, LLC And Revantage Global Services Europe S.à r.l. | Related Party
Related Party Transaction [Line Items]
Related party transaction	381	309	343	560
Perform Properties, LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	319	44	894	44
LivCor LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	117	0	276	0
BRE Hotels & Resorts, LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	380	0	869	0
LendingOne | Related Party
Related Party Transaction [Line Items]
Related party transaction	158	0	158	0
Total | Related Party
Related Party Transaction [Line Items]
Related party transaction	615	109	1,273	173
BTIG, LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	0	0	0	40
Repurchase of aggregate principal amount			0
BTIG, LLC | Related Party | October 2021 Senior Secured Notes | Senior secured notes, net
Related Party Transaction [Line Items]
Repurchase of aggregate principal amount				26,200
Gryphon Mutual Property Americas IC | Related Party
Related Party Transaction [Line Items]
Related party transaction	601	85	1,148	85
Insurance costs inclusive of premiums, capital surplus contributions, taxes and pro rata share of expenses			796	109
Gryphon Mutual Property Americas IC | Affiliates of Manager
Related Party Transaction [Line Items]
Management fees paid to manager			31	2
Blackstone internal audit services | Related Party
Related Party Transaction [Line Items]
Related party transaction	(111)	24	0	48
Lexington National Land Services | Related Party
Related Party Transaction [Line Items]
Related party transaction	46	0	46	0
Blackstone Securities Partners L.P | Related Party
Related Party Transaction [Line Items]
Related party transaction	$ 79	$ 0	$ 79	$ 0
CT Investment Management Co., LLC | Related Party
Related Party Transaction [Line Items]
Number of assets in special servicing under CLOs | asset	3		3