Securitized Debt Obligations, Net - Schedule of Information on Securitized Debt Obligations (Detail) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) loan	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) loan
Debt Instrument [Line Items]
Interest expense on securitized debt obligations	$ 43,300	$ 15,500	$ 83,100	$ 26,500
Senior CLO Securities Outstanding
Debt Instrument [Line Items]
Count | loan			3		3
Principal Balance	2,671,734		$ 2,671,734		$ 2,673,541
Book Value	2,666,414		$ 2,666,414		$ 2,664,010
Senior CLO Securities Outstanding | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan			1		1
Principal Balance	803,750		$ 803,750		$ 803,750
Book Value	800,779		$ 800,779		$ 799,626
Senior CLO Securities Outstanding | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan			1		1
Principal Balance	808,750		$ 808,750		$ 808,750
Book Value	808,171		$ 808,171		$ 806,757
Senior CLO Securities Outstanding | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan			1		1
Principal Balance	1,059,234		$ 1,059,234		$ 1,061,041
Book Value	1,057,464		$ 1,057,464		$ 1,057,627
Underlying Collateral Assets
Debt Instrument [Line Items]
Count | loan			61		63
Principal Balance	3,316,109		$ 3,316,109		$ 3,317,916
Book Value	3,316,109		$ 3,316,109		$ 3,317,916
Underlying Collateral Assets | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan			28		30
Principal Balance	1,000,000		$ 1,000,000		$ 1,000,000
Book Value	1,000,000		$ 1,000,000		$ 1,000,000
Underlying Collateral Assets | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan			16		16
Principal Balance	1,000,000		$ 1,000,000		$ 1,000,000
Book Value	1,000,000		$ 1,000,000		$ 1,000,000
Underlying Collateral Assets | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan			17		17
Principal Balance	1,316,109		$ 1,316,109		$ 1,317,916
Book Value	$ 1,316,109		$ 1,316,109		$ 1,317,916
LIBOR | Senior CLO Securities Outstanding
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			1.77%		1.73%
LIBOR | Senior CLO Securities Outstanding | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			1.69%		1.57%
LIBOR | Senior CLO Securities Outstanding | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			2.15%		2.14%
LIBOR | Senior CLO Securities Outstanding | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			1.55%		1.55%
LIBOR | Underlying Collateral Assets
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			3.25%		3.38%
LIBOR | Underlying Collateral Assets | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			3.46%		3.47%
LIBOR | Underlying Collateral Assets | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			3.07%		3.25%
LIBOR | Underlying Collateral Assets | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost			3.25%		3.42%