Borrowings - CLO Borrowings (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
CLO Term Loan February 2017 Maturing September 2029
Debt Instrument [Line Items]
Borrowing Outstanding	$ 29.7	$ 39.9
CLO Term Loan February 2017 Maturing September 2029 | Euribor
Debt Instrument [Line Items]
Interest Rate	6.34%
CLO Term Loan June 2017 Maturing July 20, 2030
Debt Instrument [Line Items]
Borrowing Outstanding	$ 35.0	45.6
CLO Term Loan June 2017 Maturing July 20, 2030 | SOFR
Debt Instrument [Line Items]
Interest Rate	6.77%
Margin spread on interest rate (percent)	1.44%
CLO Term Loan December 2017 Maturing January 15, 2031
Debt Instrument [Line Items]
Borrowing Outstanding	$ 33.7	41.1
CLO Term Loan December 2017 Maturing January 15, 2031 | SOFR
Debt Instrument [Line Items]
Interest Rate	7.01%
Margin spread on interest rate (percent)	1.68%
CLO Term Loan March 2019 Maturing March 2032
Debt Instrument [Line Items]
Borrowing Outstanding	$ 1.8	1.8
CLO Term Loan March 2019 Maturing March 2032 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	11.83%
CLO Term Loan August 2019 Maturing August 2032
Debt Instrument [Line Items]
Borrowing Outstanding	$ 3.9	4.0
CLO Term Loan August 2019 Maturing August 2032 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	8.56%
CLO Term Loan September 2020 Maturing April 2033
Debt Instrument [Line Items]
Borrowing Outstanding	$ 19.1	19.7
CLO Term Loan September 2020 Maturing April 2033 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.49%
CLO Term Loan Maturing January 2034
Debt Instrument [Line Items]
Borrowing Outstanding	$ 19.9	20.6
CLO Term Loan Maturing January 2034 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.40%
CLO Term Loan Maturing August 2030
Debt Instrument [Line Items]
Borrowing Outstanding	$ 11.9	16.8
CLO Term Loan Maturing August 2030 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.34%
CLO Term Loan March 2021 Maturing March 2032
Debt Instrument [Line Items]
Borrowing Outstanding	$ 17.4	18.6
CLO Term Loan March 2021 Maturing March 2032 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.44%
CLO Term Loan Maturing April 2033
Debt Instrument [Line Items]
Borrowing Outstanding	$ 3.5	3.6
CLO Term Loan Maturing April 2033 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	9.75%
CLO Term Loan May2021 Maturing November2031
Debt Instrument [Line Items]
Borrowing Outstanding	$ 14.1	15.5
CLO Term Loan May2021 Maturing November2031 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.20%
CLO Term Loan June 2021 Maturing January 2034
Debt Instrument [Line Items]
Borrowing Outstanding	$ 20.0	20.7
CLO Term Loan June 2021 Maturing January 2034 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.19%
CLO Term Loan Maturing November 2031
Debt Instrument [Line Items]
Borrowing Outstanding	$ 1.3	1.3
CLO Term Loan Maturing November 2031 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.68%
CLO Term Loan July 2021 Maturing July 15, 2034
Debt Instrument [Line Items]
Borrowing Outstanding	$ 15.0	15.5
CLO Term Loan July 2021 Maturing July 15, 2034 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.20%
CLO Term Loan July 2021 Maturing July 20, 2031
Debt Instrument [Line Items]
Borrowing Outstanding	$ 20.0	20.6
CLO Term Loan July 2021 Maturing July 20, 2031 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.17%
CLO Term Loan August 2021 Maturing August 2032
Debt Instrument [Line Items]
Borrowing Outstanding	$ 16.2	16.7
CLO Term Loan August 2021 Maturing August 2032 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.57%
CLO Term Loan October 2021 Maturing October 2035
Debt Instrument [Line Items]
Borrowing Outstanding	$ 23.3	24.0
CLO Term Loan October 2021 Maturing October 2035 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.31%
CLO Term Loan November 2021 Maturing January 2034
Debt Instrument [Line Items]
Borrowing Outstanding	$ 13.9	14.3
CLO Term Loan November 2021 Maturing January 2034 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.99%
CLO Term Loan January 2022 Maturing February 15, 2035
Debt Instrument [Line Items]
Borrowing Outstanding	$ 20.1	20.7
CLO Term Loan January 2022 Maturing February 15, 2035 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.21%
CLO Term Loan February 2022 Maturing November 10, 2035
Debt Instrument [Line Items]
Borrowing Outstanding	$ 20.2	20.8
CLO Term Loan February 2022 Maturing November 10, 2035 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.27%
CLO Term Loan July 2022 Maturing January 13, 2035
Debt Instrument [Line Items]
Borrowing Outstanding	$ 16.9	17.5
CLO Term Loan July 2022 Maturing January 13, 2035 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	7.23%
CLO Term Loan October 2022
Debt Instrument [Line Items]
Borrowing Outstanding	$ 0.0	18.1
CLO Term Loan September 2023 Maturing August 2031
Debt Instrument [Line Items]
Borrowing Outstanding	$ 9.6	14.3
CLO Term Loan September 2023 Maturing August 2031 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	5.39%
CLO Term Loan April 2024 Maturing August 2037
Debt Instrument [Line Items]
Borrowing Outstanding	$ 17.8	0.0
CLO Term Loan April 2024 Maturing August 2037 | Average Effective Interest Rate
Debt Instrument [Line Items]
Interest Rate	6.76%
CLO Borrowings
Debt Instrument [Line Items]
Borrowing Outstanding	$ 384.3	$ 431.7
CLO Term Loan Various | Average Effective Interest Rate
Debt Instrument [Line Items]
Margin spread on interest rate (percent)	0.50%