Consolidation - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) collateralized_loan_obligation	Dec. 31, 2020 USD ($)
Variable Interest Entity [Line Items]
Derivative liabilities	$ 0
CLOs
Variable Interest Entity [Line Items]
Number of consolidated CLOs | collateralized_loan_obligation	6
Investments	$ 2,055,107,000	$ 2,217,055,000
CLOs | London Interbank Offered Rate (LIBOR)
Variable Interest Entity [Line Items]
Investments, basis spread on variable interest rate (as percent)	10.00%
CLOs | London Interbank Offered Rate (LIBOR) | Minimum
Variable Interest Entity [Line Items]
Basis spread on variable rate (as a percent)	0.80%
CLOs | London Interbank Offered Rate (LIBOR) | Maximum
Variable Interest Entity [Line Items]
Basis spread on variable rate (as a percent)	8.90%
CLOs | Senior notes
Variable Interest Entity [Line Items]
Unpaid principal balance exceeds fair value	$ 41,400,000
CLOs | CLO subordinated notes
Variable Interest Entity [Line Items]
Debt par value	2,200,000,000
CLOs | CLO subordinated notes | Subordinated debt
Variable Interest Entity [Line Items]
Debt par value	233,700,000
CLOs | CLO senior secured floating rate notes | Senior notes
Variable Interest Entity [Line Items]
Debt par value	2,000,000,000
Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Carrying value and maximum risk of loss	$ 31,700,000