Debt - Series 2023B Notes (Details) - Senior Notes $ in Millions	Dec. 20, 2023 USD ($)	Dec. 06, 2023 USD ($)
Series 2023B-A Notes
Debt Instrument [Line Items]
Aggregate principal		$ 100.0
Basis spread on variable rate		4.75%
Minimum net worth		$ 1,060.0
Debt instrument, covenant, asset coverage ratio, minimum		1.50
Below investment grade event, interest rate (as a percent)		1.00%
Secured debt ratio event, interest rate (as a percent)		1.50%
Below investment grade and secured debt ratio events, interest rate (as a percent)		2.00%
Series 2023B-B Notes
Debt Instrument [Line Items]
Aggregate principal	$ 75.0
Basis spread on variable rate	4.45%
Minimum net worth	$ 1,060.0
Debt instrument, covenant, asset coverage ratio, minimum	1.50
Below investment grade event, interest rate (as a percent)	1.00%
Secured debt ratio event, interest rate (as a percent)	1.50%
Below investment grade and secured debt ratio events, interest rate (as a percent)	2.00%

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