Debt - Estimated Fair Values of Long-term Debt (Details) - Senior Notes - 6.875% senior secured notes due November 1, 2027 - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Stated interest rate (as a percentage)	6.875%
Estimated Fair Value
Debt Instrument [Line Items]
Long-term debt	$ 437.5	$ 373.0