Securitized Debt Obligations, Net - Schedule of Information on Securitized Debt Obligations (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Debt Instrument [Line Items]
Interest expense on securitized debt obligations	$ 87,600	$ 46,000
Senior CLO Securities Outstanding
Debt Instrument [Line Items]
Count | loan	3	3
Principal Balance	$ 2,673,541	$ 2,855,625
Book Value	$ 2,664,010	$ 2,838,062
Senior CLO Securities Outstanding | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan	1	1
Principal Balance	$ 803,750	$ 803,750
Book Value	$ 799,626	$ 797,373
Senior CLO Securities Outstanding | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan	1	1
Principal Balance	$ 808,750	$ 808,750
Book Value	$ 806,757	$ 804,096
Senior CLO Securities Outstanding | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan	1	1
Principal Balance	$ 1,061,041	$ 1,243,125
Book Value	$ 1,057,627	$ 1,236,593
Underlying Collateral Assets
Debt Instrument [Line Items]
Count | loan	63	73
Principal Balance	$ 3,317,916	$ 3,500,000
Book Value	$ 3,317,916	$ 3,500,000
Underlying Collateral Assets | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan	30	34
Principal Balance	$ 1,000,000	$ 1,000,000
Book Value	$ 1,000,000	$ 1,000,000
Underlying Collateral Assets | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan	16	18
Principal Balance	$ 1,000,000	$ 1,000,000
Book Value	$ 1,000,000	$ 1,000,000
Underlying Collateral Assets | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Count | loan	17	21
Principal Balance	$ 1,317,916	$ 1,500,000
Book Value	$ 1,317,916	$ 1,500,000
LIBOR
Debt Instrument [Line Items]
One-month USD LIBOR	4.39%	0.10%
LIBOR | Senior CLO Securities Outstanding
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	1.73%	1.69%
LIBOR | Senior CLO Securities Outstanding | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	1.57%	1.66%
LIBOR | Senior CLO Securities Outstanding | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	2.14%	2.10%
LIBOR | Senior CLO Securities Outstanding | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	1.55%	1.45%
LIBOR | Underlying Collateral Assets
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	3.38%	3.20%
LIBOR | Underlying Collateral Assets | 2021 FL4 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	3.47%	3.42%
LIBOR | Underlying Collateral Assets | 2020 FL3 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	3.25%	3.06%
LIBOR | Underlying Collateral Assets | 2020 FL2 Collateralized Loan Obligation
Debt Instrument [Line Items]
Wtd. Avg. Yield/Cost	3.42%	3.15%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
30 day average compounded SOFR reference rate	4.36%	0.05%