Transactions With Related Parties - Incurred Amounts by Related Parties (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) asset	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
October 2021 | Senior secured notes, net
Related Party Transaction [Line Items]
Repurchase of aggregate principal amount	$ 30,800	$ 33,900
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	2,125	658	$ 524
Revantage Corporate Services, LLC And Revantage Global Services Europe S.à r.l. | Related Party
Related Party Transaction [Line Items]
Related party transaction	1,270	658	524
EQ Management, LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	796	0	0
LivCor LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	59	0	0
BRE Hotels & Resorts, LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	0	0	0
Total | Related Party
Related Party Transaction [Line Items]
Related party transaction	1,121	96	1,111
BTIG, LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	124	1	191
BTIG, LLC | Related Party | Convertible Senior Notes Due 2027 | Convertible notes, net
Related Party Transaction [Line Items]
Repurchase of aggregate principal amount		500
BTIG, LLC | Related Party | October 2021 | Senior secured notes, net
Related Party Transaction [Line Items]
Repurchase of aggregate principal amount	33,800
Gryphon Mutual Property Americas IC | Related Party
Related Party Transaction [Line Items]
Related party transaction	320	0	0
Insurance costs inclusive of premiums, capital surplus contributions, taxes and pro rata share of expenses	660
Gryphon Mutual Property Americas IC | Affiliates of Manager
Related Party Transaction [Line Items]
Management fees paid to manager	13
Blackstone Internal audit services | Related Party
Related Party Transaction [Line Items]
Related party transaction	95	95	95
CT Investment Management Co., LLC | Related Party
Related Party Transaction [Line Items]
Related party transaction	$ 0	0	0
Number of assets in special servicing under CLOs | asset	2
Lexington National Land Services | Related Party
Related Party Transaction [Line Items]
Related party transaction	$ 67	0	0
Blackstone Securities Partners L.P | Related Party
Related Party Transaction [Line Items]
Related party transaction	$ 515	$ 0	$ 825